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OS/2 Help File
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1996-07-08
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30KB
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800 lines
ΓòÉΓòÉΓòÉ 1. WELCOME ΓòÉΓòÉΓòÉ
WELCOME TO MULTIPLOT/2 v1.2
---------------------------
by
Mike Stott
NeoDym Systems
15 Nesbitt St
Nepean
Ontario
Canada K2H 8C4
July 1996
Select from the following
o Quick Start
o What is Multiplot/2?
o How to Use Multiplot/2
o Intermediate Level
o Advanced Level
o Contacting NeoDym
o Copyright Notice
o Registration
ΓòÉΓòÉΓòÉ 2. QUICK START ΓòÉΓòÉΓòÉ
Copy the MLTPLT22.ZIP distribution file into a convenient directory on your
hard drive. Decompress the MLTPLT22.ZIP distribution file using PKUNZIP (DOS)
or UNZIP (OS2). Get an OS/2 command prompt by opening an OS/2 window and
change to the directory containing MULTIPLOT2. Now just type
TRYITNOW
MULTIPLOT2 should now start and open up a PM window on the desktop and show a
plot of the data sets in the sample1.dat file.
Read the following documentation and enjoy using MULTIPLOT2.
Find out more about MULTIPLOT/2
Move to how to use MULTIPLOT/2
ΓòÉΓòÉΓòÉ 3. WHAT IS MULTIPLOT/2? ΓòÉΓòÉΓòÉ
Multiplot/2 is a versatile, easy to use OS/2 2.X 32 bit Presentation Manager
application for manipulation and plotting of technical data sets and generation
of publication quality scientific and technical line graphs. On the same chart
it can plot many sets of data to the same scale and in a variety of
formats,selectable by simple menu 'click'. The data in an individual data set
can consist of any number of points (greater than zero) and the points can be
at arbitrary, non-uniformly spaced intervals on the x axis.It isn't necessary
to tell Multiplot/s how many items are in the data set. It will count them for
you. Each line can be automatically plotted in a different colour and line
type (i.e. dotted, dashed etc) or fixed as solid and black.
The data can be replotted in many different combinations of linear,
logarithmic, deciBel or polar by simple menu command.
The charts are automatically scaled to accomodate the maximum range of x and y
values in the data sets. Scaling is 'sensible' and in a 1-2-5 sequence with a
menu choice for manual override. If you want to force a larger scale
automatically, just include two extra data sets in your data file, each with a
single point in it. These points should be the bottom left corner and the top
right corner of the chart you want.
Axis labels and plot title are entered via the data file containing the
numerical data. Annotations can be added via the data file or manually and
moved or re-sized in WYSIWYG fashion using the mouse.
The plotted chart is displayed in an OS/2 PM window which can be resized or
reshaped using the mouse in the normal way.
Menu choices are presented in the diplay window to enable the user to direct
how the program interpolates between the data points. Available choices (v1.0)
are straight line,'low-pass' smoothing, cubic spline and no interpolation i.e.
only the points are plotted with no lines in between.
The displayed chart can be copied via the clipboard to a suitable PM DTP or
word processing program from which the chart can be incorporated into documents
and printed. The copying can be made as an os/2 metafile or as a bitmap.
Metafile is best as it enables the chart to be resized without loss of quality.
Unfortunately os/2 and MS Windows metafiles are different and so this method
can only be used with suitably equipped os/2 Presentation Manager programs.
The OS/2 'Picture Viewer' is a simple way to display the metafile and print the
result on the default printer. It can usually be found at
\OS2\APPS\PICVIEW.EXE.
Charts copied to the clipboard in bitmap form can be pasted into os/2 PM or MS
Windows programs. Note that bitmaps exported from MULTIPLOT/2 are copies of
the display window and so reflect any resizing or reshaping made to the window.
Metafiles are device independent and so do not resize or reshape with display
window changes. Graphs can also be saved to disk files both in metafile or
bitmap form.
Multiplot/2 has a lot of flexibility in reading and modifying data organised in
different ways. For example in 'column' or 'row' format and with one or
several 'Y' sequences corresponding to a single 'X' sequence. It can also read
data which is expressed in a recycling or modulus fashion, such as day numbers
in the week or week numbers in the year.
In addition the program can be made to "filter" (i.e. plot or not plot) a
point depending on the value of the same or some other point. Using this
facility you can selectively plot points which satisfy some separate criteria.
You can also add a value to the X and/or Y data so as to offset it and plot it
'modulo' an arbitrary value. The new data thus created can be saved to disk in
'row' or 'column' format, thereby giving you the ability to transpose your data
using Multiplot/2.
For users who want automated data generation and plotting environments,
Multiplot/2 now has an extensive command line control capability. Most
features can be controlled from the comand line, including the ability to store
the images to disk and to terminate automatically without asking for user input
when finished. This is most useful in automated unattended data generation
situations where, for example, you want to run a series of programs overnight
and look at the graph results next day.
ΓòÉΓòÉΓòÉ 4. HOW TO USE MULTIPLOT/2 ΓòÉΓòÉΓòÉ
Multiplot/2 has many levels of sophistication in its operation and many methods
of controlling the operation of the program. The guide is divided into 3 parts.
1. Simple Operation
2. Intermediate Operation
3. Advanced Operation
ΓòÉΓòÉΓòÉ 4.1. SIMPLE OPERATION ΓòÉΓòÉΓòÉ
The easiest way to run the program is to launch from the Work Place Shell.
Just display the MULTIPLOT/2 icon (for example by navigating to the directory
in which Multiplot/2 is located using the PM 'Drives' object) and double click
on it. You can also launch from an OS/2 command line. Navigate to the correct
directory using the normal and type MLTIPLT2. A file dialog window will pop up
to enable you to select a data file for plotting. Several example data files
are included as examples. The menu bar presents many choices for controlling
the nature and appearance of the plot
To make your own data files, arrange your data in an ASCII text file in column
format as shown below with the X and Y values on the same line, separated by
spaces or tabs.
x y
x y
x y
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***
x y
x y
x y
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***
"X-axis label"
"Y-axis label"
"Plot Title"
###
Each group or set of X-Y pairs results in one line on the final plot chart.
You can have up to 800 points per line and up to 60 lines on the plot. You
don't have to have the same number of points in each line and you don't have to
make the points uniformly spaced along the x axis.
If you have a situation where you have several y values all corresponding to
the same sequence of x values, you don't have to keep putting in the same x
values over again. You can instead put them in like this
X y1 y2 Y3 - -
X y1 y2 Y3 - -
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***
"X-axis label"
"Y-axis label"
"Plot Title"
###
Sometimes you get a situation where your data is arranged in
rows rather than in columns. In mathematical terms it is
"transposed" -a term borrowed from matrix operations. In
this case we get all the X values on one line and all the Y
values on the next line. We have to tell Multiplot/2 that
the data is organized in this way. This is done by putting
the keyword xytransposed before the data. For example
xytransposed
x x x x x
y y y y y
| | | | |
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***
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***
"X-axis label"
"Y-axis label"
"Plot Title"
###
Similarly to the column situation we can have several sets of y's corresponding
to the same set of x's. For example
xytransposed
x x x x
Y1 Y1