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The CDPD Public Domain Collection for CDTV 4
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multiplot
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readme.1st
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1994-05-04
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This file contains changes, hints and tips which didn't make it into the
manual. Last updated 18/7/1993.
*** Beta Testers please see section at end of file. ***
WARNING!! PLT: BUG AND WORKAROUND...
On receiving a write command, PLT: attempts to open the preferences
printer. If no printer has been defined from within preferences, PLT:
then mistakenly frees memory it has not requested resulting in a
Software Error requester and an error number of #80000005. You MUST
define a preferences printer before using the PLT: device, even if you
are just using it for print previews.
Undocumented Features and Changes.
1) If a point size of 0 is chosen in the CUSTOM PRINT WINDOW, multiplot
will now print a point. Previously a point size of 0 did not print.
2) The Y axis legend text scales as if it were not printed sideways.
This makes it easier for both axes to have text with a similar
appearance.
3) Line thickness selections made within the CUSTOM PRINT WINDOW and the
EDIT AXIS WINDOW and defined within the PRINT SETUP WINDOW are now used
to set line widths in postscript output.
4) If you get a jagged saw-tooth appearance at the right hand edge of the
Multiplot screen, it can be eliminated by: Quit Multiplot, open the
Workbench preferences overscan editor, edit the text size, pull the right
hand screen edge in from maximum a pixel or two, click on the Use button,
save changes and then reopen Multiplot.
5) The Rexx directory contains a program called MPlotRexx which will send
ARexx messages to Multiplot to assist in debugging ARexx macros which
interact with Multiplot.
6) To access the ARexx macro facility, the Rexxmast program in the system
drawer must be run before starting Multiplot.
7) The Rexx directory contains several macros which are both examples of
correct usage of Multiplot's ARexx port and are also useful in their own
right. These macros are described briefly below:
Flipset.mpt Swaps x and Y values of a selected data set.
Joinsets.mpt Merges two selected data sets.
Readtable.mpt Loads tabulated Y values. To be run as a startup script.
ScaleY.mpt Scales Y values and errors.
ShiftY.mpt Transforms Y values.
SortY.mpt Sorts points in selected data set on Y values.
8) A new startup option is available to set the PostScript font used in
both encapsulated and printed postscript output. The keyword PSFONT must
be followed by one of:
Times-Roman
Helvetica
Helv-Narrow
AvantGarde
Bookman
Palatino
ZapfChancery
Courier
Example: PSFONT=Helvetica
9) A new startup option is available to set the PostScript page size
used for printed postscript output. The keyword PSPAGE must be followed
by either:
A USA page size A
or
4 Internation A4 page size
Example: PSPAGE=4
10) Old file format files are now automatically converted to the new
file format on opening. Note that some information is lost.
CHANGES AND BUG FIXES
Since version XLNf v1.05:
* Multiplot no longer crashes if there is a right hand Y axis with a
label, but the lowermost left hand Y axis does not have a label.
Since version XLNf v1.04:
* The problem of small values being rounded to 0 has been fixed better
than the last time (!).
* Mutilation of very small values on log axes has been fixed.
* The Project/Save menu option now has an "Are you sure?" requester.
Since version XLNf v1.03:
* Data selection from ARexx has been corrected so that the Rexx command
POINTADD will work.
* The PULL window (an ARexx only window) can now open on a 200 pixel high
screen.
* The text of the error allert triggered when the PULL window fails to
open has been corrected.
Since version XLNf v1.02:
* Loading from Project/New Graph now renders the graph in a visible
pen and resets the maximum and minimum axis full plot values
correctly.
Since version XLNf v1.01:
* Autoload from Project/Open Graph now accepts files with error bars
correctly.
* Autoload now reads and sets the column settings in the Data Selection
Window.