Easier to tell what this is by showing the contents file:
Playing Cards Toolbox.
Version 1.0 17-Jun-2005
readme_card.txt - New features, bug fixes, and changes in this version.
cardplot - Plots cards (non-object).
solitaire - A solitaire game template of sorts.
card - Card object constructor.
cards - Card matrix.
deck - 13x4 Standard card deck.
rcard - Random card matrix.
iscard - True for card objects.
isjoker - True for joker cards.
isup - True for face up cards.
isvisible - True for visible cards.
eq - Equal values. ==
ne - Not equal values. ~=
lt - Less than for values. <
gt - Greater than for values. >
le - Less than or equal for values. <=
ge - Greater than or equal for values. >=
horzcat - Horizontal concatenation. [,]
vertcat - Vertical concatenation. [;]
change - Change value and suit.
ctranspose - Flip card. '
facedn - Turn card face down.
faceup - Turn card face up.
flip - Flip card.
hide - Hide card.
joker - Change to joker cards.
show - Show card.
suit - Set or show suit.
value - Set or show value.
sum - Sum or "weighted" sum of values.
weight - Weighting card values.
Card plotting and display.
table - Creates a card table.
delete - Deletes plotted card objects from table.
deselect - Pick a card with the mouse.
disp - Display card objects.
display - Standard output for card objects.
plot - Plots cards on a table.
select - Put down picked card.
slot - Card stacking slot.
csize - Size of card.
cwidth - Width of card.
layer - Set or show card layer.
layout - A layout manager.
position - Set or show card position.
snap - Snap cards to grid.
The toolbox contain several examples in order to quickly get started.
The plot function uses the CARDPLOT utility.
Note: Refer to CARD/DISP for how to change the display format for cards on the std output.
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