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educatio
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README.DOC
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1991-04-04
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Recent PEANUT Software developments:
The Escape key is routinely used to exit a menu; Q no longer works.
The Ctrl-Key list of special keys is now a menu, in that your selections will
activate the desired functions at once. Before, the list was just a help
file; i.e., it was necessary to return to the program in order to execute
instructions.
The way to end a program is now Ctrl-END (not Ctrl-E). It was too easy to
accidentally strike Ctrl-Q when trying to request Ctrl-Window changes.
The Ctrl-W menu has a new appearance. For one thing, there are two types of
zoom window. One is the (old) 10X zoom. The other is a "flexible" zoom box,
whose shape and size are determined by the user. First one Marks a corner,
then moves the cursor to the opposite corner of the desired rectangle; the box
is updated during the moving process. Pressing ENTER actives the new window.
Another new item in the Window Change menu is the opportunity to define new
windows by specifying the Extreme values for each of x and y.
The identifiers PI, SQR, and SQ (or ^2) are now available in traditional form;
that is, the correct mathematical symbols can be inserted in the text. They
are obtained with Ctrl-P, Ctrl-S, and Ctrl-E, respectively, but only on those
(newer) machines that have the necessary characters stored in ROM!
New in PLOT:
The main menus in all of the subprograms (PLOT2D, PLOT3D, EULER) now look the
same; there is a function on display, along with menu items New, Edit, Remove
(which means drop from the catalogue), Interval/domain, and Draw. The main
PLOT2D menu now offers Zeroes, Highs/Lows, and Tables of values; this data can
be printed or displayed on screen.
The Advanced PLOT menu offers Animation effects, which allow the user to (for
example) display several views of a surface in succession; these can be saved
to disk. The animation window is of necessity small for a high-resolution
color card (EGA, VGA), because a lot of RAM is needed to store the images. In
black-and-white modes, however, the window can be larger (the default is). In
any event, the window (whose default position is in the upper left corner of
the graphing window) is movable.
New in GEOM:
It is now possible to provide geometric/numerical input more freely than
before. One can input the radius of a new circle as 2AB, for example, if A
and B are points that already appear in a diagram. One can ask for
measurements by typing expressions such as <ABC or AB:AC or AC/(AB+BC) or
PA*PB, etc.
A new way of adding points to a diagram is via transformations - that is, via
rotations, reflections, translations of given sets of points.
New in MATPAC:
The allowable sizes for matrices have increased, to 12-by-12 in rational mode
and 20-by-20 in floating-point mode. In the former, integers may have lengths
up to 252 decimal digits. Large matrices (many entries or large formats) are
displayed in part if the whole matrix does not fit on the screen. The arrow
keys are used to scroll hidden entries into view. The Home and End keys move
a whole page horizontally, while the PgUp and PgDn keys move pages vertically.
A display at the bottom of the screen indicates which columns/rows are on
display, if there is anything missing.
In the New matrix menu, there is an item (Variables) that allows the user to
set up a matrix of functions, whose values depend on certain variables. One
can change the matrix by simply adjusting the variables. The function entries
can be edited, saved, and recalled.
Read the ASCII files *.DOC for up-to-date descriptions of how to use the
various programs. GENERAL.DOC contains information applicable to all
programs.
Added 12 March 1991:
The programs now allow the *.DOC files to be viewed while the program is
running. Press ?. If the program can find the program-specific *.DOC file or
the GENERAL.DOC file, it will display the text in the graphics window, where
it can be viewed one page at a time. If these files are in a different
directory (or on a different drive), and if the program has file-management
options, you can reset the search path so that it will find them. To
facilitate paging through a *.DOC file, it is now possible to request specific
text strings. Press ENTER to activate the process, then ENTER again when the
target string is what you want. The program will scroll to the first instance
where the target string is found on a single line of the display. The search
is not case-sensitive.
The parser now accepts expressions SUM(b,F) and PROD(b,F). The former stands
for the sum (and the latter stands for the product), for n=0 to n=b, of a
function F(n,x). The default index of summation is n, but this can be
redefined, via the Ctrl-F menu; the initial value of the summation index can
also be redefined.
To see credits in the main menu, press Home. This change was necessary
because Escape is now routinely used to back out of menus.
New in PLOT: Because series and products are now available in all programs
that accept function input, the Series and Product Menu is now unnecessary,
and so it has been removed.
Added 3 April 1991:
PLOT now has improved performance in the Extreme points and Intersections
menus. See the documentation.
FEEDBACK now has the capability of producing Zoom slide shows in the Fractal
and Mandelbrot subprograms. In EGA graphics, one can fit about forty small
images in RAM, which are then played back rapidly (depending on the speed of
your machine). The collection of slides is of course saved to a disk file,
because it takes a while to produce.