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-
- DataPlot User's Guide
-
- Version 2.10 - 24 June 1991
-
- Table of Contents
-
- INTRODUCTION . . . . . . . . . . . 1
- STARTUP. . . . . . . . . . . . . . 2
- KEYBOARD OPERATION . . . . . . . . 3
- STOP . . . . . . . . . . . . . . . 4
- DATASETS . . . . . . . . . . . . . 5
- OPTIONS. . . . . . . . . . . . . . 6
- DEFAULT OPTION VALUES. . . . . . . 7
- INTERACTIVE OPTIONS. . . . . . . . 8
- FILE READING . . . . . . . . . . . 9
- CROSSHAIRS . . . . . . . . . . . .10
- FUNCTIONS. . . . . . . . . . . . .11
- MACROS . . . . . . . . . . . . . .12
- PRINTERPLOT. . . . . . . . . . . .13
- PLOTTEXT . . . . . . . . . . . . .14
- RESCALE and REPLOT . . . . . . . .15
- SKETCH FREEHAND. . . . . . . . . .16
- HPGL and PLT:. . . . . . . . . . .17
- DRAWFUNCTION . . . . . . . . . . .18
- SCREENPRINT. . . . . . . . . . . .19
- SCREENDUMP . . . . . . . . . . . .20
- SAMPLE FILES . . . . . . . . . . .21
- THE END. . . . . . . . . . . . . .22
-
-
-
- 1. INTRODUCTION
-
- DataPlot2.1 makes 2-dimensional plots of data on the screen and
- on dot matrix printers which are Epson MX-80 compatible. Hard
- copy plots can also be made in the Hewlett-Packard Graphics
- Language for driving pen plotters. If the PLT: driver is
- installed, then the output can be to any preferences supported
- dot matrix printer. Screen plots can be made at any resolution,
- and may range in size from 200 x 100 pixels to full screen.
- Screen prints are transferred to paper on a pixel to pixel
- basis. Variable size paper plots can be made to dot matrix
- printers, with the plots ranging from 4.5 to about 18 cm on a
- side. Up to 100 sets of data may be plotted on one screen. Up
- to 2 billion points can be in each data file, although it would
- take an unreasonably long time to plot that many points. Each
- file may have from 1 to 50 columns of numbers. Plots can be
- saved as IFF files. There is also a macro language for
- repetitively plotting datasets using the same options. At least
- one megabyte of ram is required.
-
- DataPlot2.1 is easy to use. It may be run from either WorkBench
- or the CLI. Many items can be selected from the mouse menu.
- Nearly all options may be set by clicking on them from the
- options screen. The keyboard may be used to select several of
- the mouse menu commands. These single key shortcuts are listed
- below under KEYBOARD OPERATION.
-
- 2. STARTUP
-
- Start up DataPlot2.1 by typing the name from a shell or CLI, or
- from WorkBench by double clicking on the icon. DataPlot2.1
- uses four system libraries. In order to use them, four special
- files, dos.bmap, exec.bmap, graphics.bmap, and intuition.bmap,
- are necessary. They are included on the Extras 1.3 disk. If
- they are not found in the LIBS: directory or in t:, then a
- short version will be created in t: and deleted as the program
- ends.
-
- A point-and-click file name requester is available when reading
- a file. Selecting the Requester box or pressing F8 calls up the
- file requester. If arp.library is in libs: and BatchRequester
- is in c:, then the ARP file requester, which is faster than the
- built-in one, will be used.
-
- Otherwise, a built-in requester will be used which starts at the
- top level of disk drives and assigned directories. Clicking on
- a file name selects that file for reading by DataPlot2.1. A
- file name can be entered from the keyboard by clicking on the
- "File:" word at the top of the requester window. Pressing ENTER
- ends the entry. All ".info" files are eliminated from the
- requester. The list of files is sorted without regard to case.
- Clicking on a directory name results in a display of
- subdirectories and files. The path is shown in the second line
- of the requestor. If there are no files from which to choose,
- then the display will indicate that and you may select cancel or
- parent directory from the bottom of the requester.
-
- Upon start up, DataPlot2.1 sets up the default options (as
- stated below) and opens a custom 640 x 200 pixel, 4-color
- screen. Selecting the "Plot a dataset" menu item will bring up
- a file name request window. The specified file will be read to
- determine any options to be applied, such as which column is X
- and which is Y. Options contained in the dataset file will
- override options set from the keyboard, unless USE NO is set,
- meaning that DataPlot2.1 is not to use any of the in-file
- options. After reading the options, the file will be read again
- to obtain the data. Automatic scaling information is determined
- from the first file to be read which actually contains any data
- points. A file could have only options and no data, if desired.
- After the scaling is performed, the file is read again and each
- point is plotted. Therefore, KYBD: may not be used as a data
- file name.
-
- The plot can be transferred to paper by selecting the menu item
- "Screen Print" or "Paper Plot". The "Screen Print" selection
- will make a screen pixel to printer pixel copy of the plot. The
- "Paper Plot" selection will read the data files again and make a
- plot at the size specified. (This is the DataPlot1.0
- capability.) The Y-axis label will be printed horizontally at
- the top of the Y-axis in the paper plot to Epson mode. It will
- be printed vertically in the HPGL mode. Plots can be made to
- any preferences supported printer by selecting the HPGL output
- to be the PLT: device, which will rasterize the HPGL output and
- send it to the printer. IF the output is to a file, then an
- ASCII file of HPGL commands will be created. That file may be
- copied to PLT: for a printer plot. If you copy the file to
- PLT:S, then the plot will be drawn on a high-resolution screen,
- giving a preview of the printer plot.
-
- 3. KEYBOARD OPERATION
-
- In addition to using the mouse to select operations to be
- performed, you may enter the characters shown in parentheses in
- the pull-down mouse menus and shown here to activate the
- indicated commands:
-
- Help (Help key)
- New Plot (N)
- Plot a Dataset (D)
- Draw a Function (F)
- Execute a Macro (M)
- Save as IFF file (F1)
- Save as a Macro (F2)
- Crosshairs (C)
- Rescale & Replot (R)
- Plot text (T)
- Sketch Freehand (S)
- Set an Option (O)
- Quit (Q)
- Printer Plot to Preferences Printer (P)
- Screen Print to Epson compatible printer (F3)
- Printer Plot to Epson compatible printer (F4)
- Printer Plot to HPGL output (F5)
- Screen Dump to Preferences Printer (F6)
-
- Case is insignificant. The left and right arrow keys may be
- used to position the cursor when entering a value from the
- keyboard. Some requestor boxes include boxes to erase, accept
- (OK), and cancel the operation with the mouse. Whether these
- boxes are shown or not, certain keys may be used as follows:
-
- Erase the entry F9, control-X, or control-U
- Cancel the operation ESCape
- Accept the entry F10 or ENTER
-
- These functions are available by clicking the mouse in the
- appropriately named box. The cursor can be positioned in the
- entry by use of the mouse and the cursor arrow keys.
-
- 4. STOP
-
- An operation, such as plotting a curve or printing a plot may be
- halted with a control-C. The screen will flash and beep, then
- after the current point or line is processed, the operation will
- be aborted. Two control-C's within one second will terminate
- DataPlot.
-
- 5. DATASETS
-
- A data file consists of any number of option lines followed by
- the data points. Each line of data consists of from 1 to 50
- data values separated by a comma or spaces or both a comma and
- spaces. By default, the first column of data contains the X
- axis values, and the second column contains the Y axis values.
- The options XCOLUMN=n and YCOLUMN=n (where n may range from 1 to
- 50) may be used to specify which columns of data are to be
- plotted.
-
- If the data consists of only one column of values, then the
- option "DATA = UNIFORM" may be used. DataPlot2.1 will then read
- only the Y values from the file, with the X values starting at 1
- and incremented by 1 with each point. The program detects the
- start of numeric data following option lines (which may be blank
- lines) when the first non-blank character is numeric, meaning
- the digits 0-9, +, -, or a decimal point. The first several
- lines of data may be skipped by setting the option SkipPoints=n.
- Data is normally read until an end of file is reached. If the
- entire file is not to be read, then the option MaxPoints=n can
- be used to specify how many points to read. Reading will stop
- sooner if an end of file is detected.
-
- The data file may also consist of just one column if the
- Xcolumn=1 and Ycolumn=1 options are used. With only these
- options, the plot would simply be a straight line. Using the
- FUNCTION options, one could plot a number of different curves
- using that same file as the input dataset.
-
- A data file may consist of only options. If the same set of
- options are always used, you may wish to make a file containing
- just them. Such a file could be named MACRO.AUTO and placed in
- the default directory. It would then be executed automatically
- whenever DataPlot2.1 is run from that directory. Another choice
- is to create a macro file DataPlot.init in the S: directory, and
- it will also be executed automatically when DataPlot2.1 is run.
- DataPlot.init might have your choice of colors, for instance, or
- perhaps your choice of screen resolution and depth. It could
- simply speak a message telling you that DataPlot2.1 is ready.
-
- To save time when plotting a very large dataset with known
- minima and maxima, one could set the proper limits with the
- XMINIMUM, XMAXIMUM, YMINIMUM, and YMAXIMUM options. If a
- minimum or maximum value is set, then the specified value will
- be used for autoscaling, with the other values obtained from the
- first dataset. For manual scaling, one must also set
- SCALE=MANUAL, and supply XSTEPS and YSTEPS. (The default number
- of steps is 5). With manual scaling, the user is responsible
- for selecting values that will result in numerics with a nice
- appearance.
-
- 6. OPTIONS
-
- An option line consists of an option name, which is always just
- one word, followed by an equal sign or a space and an option
- value. The spelling of the option may be truncated. Upper case
- is not required. An unrecognized option in a data file is just
- ignored and the processing continues. The option PRINTOPTIONS
- will result in an output to the currently specified PRINTERPORT
- of the current values of the options, which are:
-
- TITLE = text (Text for plot title)
- XLABEL = text (Text for X axis label)
- YLABEL = text (Text for Y axis label)
- MARKERS = YES or NO (Draw a marker for each data point, YES)
- 1 - 10 (increments the marker number, else use
- (the indicated marker)
- SEGMENTS = YES or NO (Draw line segments between data points)
- XCOLUMN = 1 thru 50 (Selects the column with the x values)
- YCOLUMN = 1 thru 50 (Selects the column with the y values)
- ZCOLUMN = 1 thru 50 (Selects the column with the z values for
- use with a function)
- ErrorColumn = 1 thru 50 (Selects the column with the error
- values, an error bar will be drawn)
- REMARK text (Ignore this comment line)
- ;text (Ignore this comment line also)
- DATA = X,Y or UNIFORM (Data is X,Y or just uniformly spaced Y)
- SkipPoints N (Skip the first N points)
- MaxPoints N (Plot only N points)
- PrinterType EPSON (Sets the escape code for dots/lf,
- Epson MX-80 uses ESC A 8)
- or IBM (Uses ESC A 8 ESC 2)
- or EPSONQ (Uses ESC + 40 for 40/360 inch lf)
- NEWPAGE (Eject page when finished with plot)
- NOTE text (Notes will be printed below the plot
- for Epson printer plots)
-
- YFUNCTION algebraic-expression (Applies to the y-axis)
- XFUNCTION algebraic-expression (Applies to the x-axis)
- FUNCTION algebraic-expression (A function to be applied to the
- y-axis values, including the
- following:)
-
- SIN (Sine, angle in radians for all functions)
- COS (Cosine)
- TAN (Tangent)
- ASIN (Arcsine)
- ACOS (Arccosine)
- ATAN (Arctangent)
- SINH (Hyberbolic sine)
- COSH (Hyberbolic cosine)
- TANH (Hyberbolic tangent
- EXP (e raised to the value)
- LOG (Log to base 10)
- LN (Natural log)
- SQRT (Square root)
- ABS (Absolute value)
- INT (Integer part)
- FRAC (Fractional part)
- ^ (Exponentiation)
- ** (Exponentiation)
- X (The value read from the X-column)
- Y (The value read from the Y-column)
- Z (The value read from the Z-column)
- DATE (YYMMDD to YY.fraction)
-
- A blank expression erases the function; the variable is plotted.
-
- The following options may NOT be set after the first file:
-
- SCALE = MANUAL or AUTO (Manual or automatic scaling)
- XMINIMUM = value (Minimum X value for scaling)
- XMAXIMUM = value (Maximum X value for scaling)
- XSTEPS = 1-30 (Number of x steps for scaling)
- YMINIMUM = value (Minimum Y value for scaling)
- YMAXIMUM = value (Maximum Y value for scaling)
- YSTEPS = 1-30 (Number of y steps for scaling)
- XAXIS = LINEAR or LOGARITHMIC (X axis type)
- YAXIS = LINEAR or LOGARITHMIC (Y axis type)
- NUMERICS = YES or NO (Print numbers along the grid axes)
- MAJORTICKS = YES or NO (Draw major ticks, no grid lines)
- GRIDS = YES or NO (Draw grid lines, no major ticks)
- MINORGRIDS = YES or NO (Draw minor grid lines for log axes)
- GridTint = N (Selects the color for the grid lines,
- the default is 1)
- GRIDPATTERN DASHED or SOLID (Selects the grid line pattern)
- YLABELSIZE = 2 or 1 (Sets Y label height, pixels not square)
-
- Some options are primarily for use with macros or from the
- keyboard by the user while running DataPlot2.1:
-
- HELP (Type this information to the screen)
-
- RESET (Reset options to default values, may only be used
- after a NewPlot command, does not affect colors)
-
- VOICE male or female (Default is male)
-
- ChangeDirectory, CD, or CHDIR newdirectory (Change the default
- directory from which files will be read.
- Using "CD ." in a macro means to change
- to the directory in which the macro is
- located.)
-
- EpsonResolution 480 or 960 (The graphics mode for screen
- printing)
-
- LaserJetResolution 75, 150 or 300 (Size and resolution of
- screen print)
-
- ScreenResolution 320x200 (Sets screen resolution, then executes
- or 640x200 a NewPlot. If there is insufficient
- or 320x400 RAM, then screen depth or resolution
- or 640x400 will be reduced automatically.)
-
- ScreenDepth 1-5 (Determines number of colors, 2^ScreenDepth,
- only after a NEWPLOT, default value is 2.)
-
- CurveColor 1-31 [r,g,b] (Select the color for the curve, can
- not exceed (2^ScreenDepth)-1. The [red,
- green, blue] values are optional.)
-
- ColorPalette color,r,g,b (Set the RGB values for a color, 0-31
- with the red, green, and blue values
- ranging from 0 to 15. Color 0 is the
- background, 1 is for text and the grid,
- and higher colors are for curves.)
-
- WindowSize 200,100 to 617,386 (Set window size, can be done with
- or 297,186 mouse before the first dataset is
- plotted.)
-
- OnError WAIT, EXIT, or CONTINUE (Determines whether macro
- execution stops, DataPlot exits,
- or action continues on an error)
-
- 7. DEFAULT OPTION VALUES
-
- The default options are reset when a new plot is begun. These
- are:
-
- Title = DATA PLOT
- Xlabel = X
- Ylabel = Y
- Scale = auto
- Xdirection = forward
- Ydirection = forward
- Xaxis = linear
- Yaxis = linear
- Numerics = yes
- Grids = yes
- MajorTicks = no
- Newpage = no
- Orientation = landscape
- Printer = Epson
- PrinterPort = PAR:
- EpsonResolution = 480
- LaserJetResolution = 75
- Ylabelsize = 2
-
- If scale = manual is invoked, then the six following default
- values are set, but may be changed.
-
- Xminimum = 0
- Xmaximum = 10
- Xsteps = 5
- Yminimum = 0
- Ymaximum = 10
- Ysteps = 5
-
- After a dataset is plotted, the following options are reset
- for the next file:
-
- Data X,Y
- Markers yes (Incremented to the next marker type; there are 10)
- Segments yes
- SkipPoints 0
- MaxPoints 2000000000
- Xcolumn 1
- Ycolumn 2
- Zcolumn 0
- ErrorColumn 0
- Xfunction clear
- Yfunction clear
-
- 8. INTERACTIVE OPTIONS
-
- During interactive use of DataPlot2.1, after selecting a new
- plot with an N from the keyboard or from the mouse menu, the
- screen will be cleared and an options screen will be presented.
- These options may be selected by clicking with the mouse. All
- options can also be set from the keyboard by just typing the
- name of the option and the value. An area at the bottom of the
- screen will be cleared and your entry will appear there. An
- escape or mouse click in the appropriate box will end the
- setting of options. Clicking on an option which has only two or
- three valid values will automatically change the option to
- another valid value. Clicking on a string option, such as the
- TITLE, will allow the user to edit the current title. Clicking
- on one of the functions will allow the user to edit the last
- entered function, even if it contained an error and was not
- currently displayed on the screen. Clicking on the MARKER
- option will cause all ten markers to be displayed. A marker is
- then selected by clicking on it. To turn markers off, type in
- the command Markers NO.
-
- Certain options, such as axis directions, can only be set before
- a file is plotted or a function is drawn. Thus, when setting
- new options for the next dataset, only those options which can
- be changed will be presented.
-
- 9. FILE READING
-
- DataPlot2.1 reads each file to be plotted several times. The
- first time is to activate any options that may be included in
- the file. The second time, the file is reopened, the option
- lines are skipped, and the data are read. If autoscaling is in
- effect, then the first data file may be read an additonal time
- to determine the minimum and maximum values. The file will not
- be read to determine the minimum and maximum values if they have
- been set by the appropriate options. If a paper plot is made,
- then the file is read another two times to replot the data to a
- bitmap. Therefore, KYBD: may not be used as a file name.
-
- 10. CROSSHAIRS
-
- When the CrossHairs mode is selected from the mouse menu, a
- small set of crosshairs will appear on the screen outside the
- plot area, and the pointer will be different. Clicking the
- mouse inside the plotting area will result in the crosshairs
- being drawn at the selected point and the corresponding values
- of X and Y appearing in the title bar. To exit this mode, click
- the mouse outside the plotting area, or press a key.
-
- 11. FUNCTIONS
-
- DataPlot can do manipulation of the data points with the
- FUNCTION options. For instance the functions
-
- (abs(1.56-tan(y)))^.5
- or
- sqrt(x^2 + y^2) + (cos(x))^2
-
- could be used. Specifying either FUNCTION or YFUNCTION
- specifies an operation on the Y-axis values of the plot, whereas
- XFUNCTION specifies an operation on the X-axis values. The
- functions are applied to the x and y values as read from the
- dataset file.
-
- The following function can be used to convert from a six or
- eight digit date in the format YYMMDD to a year + approximate
- fractional year format for plotting, and may be invoked by
- specifying the DATE keyword:
-
- int(x/10000)+int(frac(x/10000)*100-1)/12+int(frac(x/100)*100-1)/365
-
- The function will be compiled and optimized to the extent that
- successive operations using constants will be evaluated at
- compile time.
-
- 12. MACROS
-
- DataPlot2.1 has a macro language which is useful for repeating
- plots. This macro language consists of all the options
- previously discussed, plus the following commands. Case is not
- significant, and commands may be truncated to three or more
- characters.
-
- NEWPLOT (Clear screen for new plot)
-
- DATASET filename (Plot this dataset)
-
- DRAWFUNCTION expression,xmin,xmax (Draw this function from
- xmin to xmax)
-
- RESCALE [Xmin,Xmax,Ymin,Ymax] (Auto rescale and replot)
-
- CROSSHAIRS (Start interactive crosshairs)
-
- SCREENPRINT Epson, Epson2x, LaserJet (Copy the screen to the dot
- matrix printer on a pixel to pixel basis.)
-
- SCREENDUMP (Print the screen to your Preferences selected
- printer using your Preferences selected options.)
-
- PRINTERPORT port (PAR: is the default)
-
- PAUSE message (Prints message, waits for key or mouse)
-
- BEEP (Beeps)
-
- SPEAK message (Speaks the message)
-
- PLOTTEXT "text" color xval,yval (Places text on the plot)
-
- PRINTERPLOT Epson, Epson2x [width, height, left margin]
- (Makes a dot-matrix paper plot in portrait
- orientation only, with the 2x indicating
- double strike. [Optionally, one may specify
- width and height in cm, and left margin in
- character spaces.])
-
- PRINTERPLOT HPGL (Makes a paper plot in the HP
- Graphics Language)
-
- PRINTERPLOT PREFERENCES (Makes a paper plot to the
- preferences selected dot matrix
- printer through the PLT: software)
-
- PRINTERADVANCE TOP or NNN (advance printer to top of form, or
- advance printer NNN lines)
-
- PRINTFILE filename (copy file "filename" to the printer)
-
- PRINTLINE text (copy the line of text to the printer)
-
- IFFSAVE iffname (Save screen as IFF ILBM file, about 41K
- free space is required)
-
- OnError WAIT, EXIT, or CONTINUE (Macro error response,
- WAIT waits for the user, EXIT terminates
- DataPlot2.1, CONTINUE ignores the error)
-
- USE YES or NO (Use or ignore in-file options)
-
- QUIT (Quit DataPlot2.1)
-
- An unrecognized macro command will be executed as an option.
- Error handling can be specified for macro file execution. If
- OnERROR WAIT has been set (the default) then execution of the
- macro will stop with an error message and wait for user
- intervention, which can be to exit the macro or to continue. If
- OnERROR EXIT has been set, then DataPlot2.1 will exit on an
- error. If OnERROR CONTINUE has been specified, then the error
- will be ignored and execution of the macro will continue with
- the next command.
-
- The 2x suffix for Epson printer plots makes a double strike to
- make the print darker.
-
- For interactive selection, a question mark (?) may be used for a
- command or for a command argument. The user will be prompted
- for the argument to be used (e.g. DATASET ?). A user supplied
- default value may be entered following the question mark, as in
- these two examples:
-
- DataSet ? data1 (The user must select a dataset,
- data1 is provided as the default)
-
- ? screenprint (The user must select a command,
- screenprint is the default)
-
- If there is a file named DataPlot.init in the S: directory, then
- it will be executed upon startup. Such a file could have your
- choice of screen colors or depth. Then if there is a MACRO.AUTO
- file in the default directory, it too will be executed. Even
- though DataPlot2.1 does not have an AREXX port, it can be
- controlled by a script file though the MACRO.AUTO file. An
- automated system could collect data from a data acquisition
- system, write an appropriate MACRO.AUTO file, then run
- DataPlot2.1 to generate a printer plot.
-
- A plot can be saved as a macro, which can be edited by
- MicroEmacs, for example. The commands NewPlot and
- ScreenResolution are not included when a macro is saved, and
- must be added by the user. The NewPlot command erases any
- internally stored macro commands in the history buffer.
-
- 13. PRINTERPLOT
-
- A paper copy of the screen plot can be made using the
- PrinterPlot (or PAPERPLOT) command. Before using this command
- from a macro, the PrinterPort command should be used to specify
- the output device, whether it is PAR:, PLT:, or a file. The
- PrinterPort should not be specified as PRT: for a printer plot
- because the Amiga Operating System will not pass the escape
- sequences to the printer as required for bit-mapped graphics.
- If NULL: is specified as the PrinterPort, then no output will be
- sent to the printer. This is internal to DataPlot2.1 and does
- not require a NULL: device driver.
-
- 14. PLOTTEXT
-
- Text can be positioned on a plot with this command. After the
- user selects this mouse menu command, the text color can be
- selected with a mouse click, and then the text may be typed in.
- Next, the text may be positioned on the plot by moving the mouse
- and clicking at the desired location.
-
- When used in a macro, the format is:
-
- PlotText "the text" textcolor xposition,yposition
-
- where the desired text must be in quotes if it is more than one
- word. The arguments may be separated by commas or spaces at the
- user's option. The x and y positions are given in the scale
- coordinates (the values printed along the axes). A warning note
- will appear briefly on screen if the position is out of range.
- If the text color, an integer from 1 to 31, is greater than that
- allowed by the current screen depth, then it will be set to the
- maximum number permitted.
-
- 15. RESCALE and REPLOT
-
- This command is useful when multiple datasets are plotted on one
- screen with autoscaling selected. Only the first dataset is
- used to determine the scaling. Consequently, subsequent data
- points or even entire datasets may be out of range. The RESCALE
- macro, or the mouse menu option Rescale and Replot (R), may be
- used to automatically set new autoscaling limits so that all
- points will be in range. The datasets will be read again and
- replotted. DataPlot will attempt to rescale such that PLOTTEXT
- strings will also be in range.
-
- Values for Xminimum, Xmaximum, Yminimum, and Ymaximum may be
- entered on the line with RESCALE. These values will be used
- for rescaling, instead of the default range if desired. This is
- useful for zooming in on a section of data. A default value
- will be used where a new value is omitted. For instance, the
- macro command
-
- RESCALE ,,0,1
-
- would use the default extreme values for Xminimum and Xmaximum,
- but would set Yminimum to 0 and Ymaximum to 1, and then replot
- the datasets.
-
- 16. SKETCH FREEHAND
-
- This mode permits the user to select a color and turn on pixels
- by moving the mouse over them while holding the left mouse
- button down. The results are only shown on the screen and can
- only be copied to a printer through the ScreenPrint commands.
-
- 17. HPGL and PLT:
-
- The Hewlett-Packard Graphics Language is used to drive HP pen
- plotters. It can also be used to drive any preferences
- supported graphics printer through the use of the PLT: device,
- which was written by Rich Champeaux and Jim Miller. The PLT:
- device accepts HPGL commands and produces a raster image which
- can be displayed on the Amiga screen, or sent to the printer.
- The instructions for installing the PLT: device are included in
- the PLT.doc file. All of the PLT software is included at no
- extra cost. If PaperPlot HPGL is selected, then the output will
- be a file of HPGL commands. That file can be copied to PLT:S
- for a screen preview, or copied to PLT: for output to your
- printer. It is an ASCII file, and can be edited, if necessary.
- Pen 1 is used for the text, with pens 2 through 8 used for
- plotting the data. The pen number is incremented for each
- dataset. The CurveColor option will override the automatic
- increment. PLT: uses black as the default color for all pens.
- The CLI command
-
- copy hpglfile to plt:/000-1/f00-3/
-
- will produce a plot with pen 1 set to black and a thickness of 1
- pixel, and with pen 2 set to red and a thickness of 3 pixels.
- The three consecutive digits specify, in hex, the relative
- amounts of red, green, and blue. The dashed number specifies
- the pen width in pixels.
-
- If you have sufficient ram, then you can specify PLT: as the
- output device directly from DataPlot, with any color options you
- desire. If your printer is monochrome, then color options
- should not be specified.
-
- Specifying PLT:S for a screen preview directly from DataPlot2.1
- has sometimes resulted in corrupted RAM. You are hereby warned!
-
- If you intend to install PLT:, then please read the
- instructions. Essentially, it consists of adding a MountList
- entry in DEVS:, copying the plt-handler to L:, and assigning
- PLOTDATA: to a subdirectory containg the plot fonts. A batch
- file is included for automatically modifying your MountList, and
- copying the PLT-handler to L: for you. It also assigns PLTDATA:
- to the directory containing the fonts and a font list. This
- file should only be executed once! You may want to modify your
- Startup-Sequence to Mount PLT: and to Assign PLTDATA: to the
- appropriate directory.
-
- 18. DRAWFUNCTION
-
- DataPlot2.1 will also plot functions entered by the user, either
- in a macro or interactively from the mouse menu. The function
- must be a function of x only, unlike functions which can be
- applied to data points. If no data has yet been plotted, then
- the limits which are entered for plotting the function will also
- be used to auto-scale the plot. The same set of functions used
- for manipulating the data points is available for DrawFunction.
-
- 19. SCREENPRINT
-
- Under the ScreenPrint menu item, the user may select either
- portrait (vertical) or landscape (sideways) orientation for a
- pixel to pixel printer copy of the plot window. Any pixel that
- is other than the background color (color 0) will be printed as
- a dot on the printer. The size of the printout depends on the
- size and resolution of the plot window and the orientation. If
- the plot is too large to fit the page with the selected
- resolution, the resolution is automatically increased in order
- to shrink the size of the plot. The printer must be compatible
- with the Epson graphics commands for this to work properly.
-
- 20. GRAPHICDUMP
-
- Selecting GraphicDump will result in a printer output using the
- Preferences selected options to the Preferences selected graphics
- printer. The appearance of the output can change greatly with
- size, color, and the graphics options. The best results will
- probably be obtained by using a black background (color 0 0,0,0)
- with white curves (color 1 15,15,15) using a screendepth of 1 for
- a plot with only 2 colors. The Preference option for "negative"
- should also be selected. Other combinations will also work.
-
- 21. SAMPLE FILES
-
- There are sample data files and macro files on the DataPlot2.1
- disk. Please examine them to see examples of the proper format.
-
- 22. THE END
-
- Your suggestions for improving DataPlot are welcome.
-
-
- Bytes and Bullets
- Route 3 Box 3532
- Manchester TN 37355
- (615)-596-2077
-