Re: Casio Prizm screenshot Message #2 Posted by Thomas Klemm on 19 Dec 2010, 2:33 p.m., in response to message #1 by Don Shepherd
What an improvement compared to what we can do with an HP48G:
Since I'm not that familiar with plotting I had to consult the manual. You need two different plottypes: TRUTH and CONS.
As suggested in the manual I created two variables:
INEQ
'Y\>=X+1 AND Y<2*X+3'
EQNS
{ 'Y=X+1' 'Y=2*X+3' }
Now you can choose one or the other for EQ. Don't ERASE the graph after drawing the first plot.
Currently I'm reading the fun of programming.
There's a chapter dealing with images (7 Functional images). So I wondered whether I could do that with my HP48 as well. Here we go:
Checker
checker
\<<
FLOOR SWAP
FLOOR +
2 MOD
NOT
\>>
EQ
\<< Y X checker \>>
Polar Checker
Make sure you have your calculator in RADmode.
toPolar
\<<
R\>C DUP
ABS SWAP ARG
\>>
n = 10
EQ
\<<
Y X
toPolar
\pi /
n *
checker
\>>
Swirl Vertical Strip
vstrip
\<< ABS .5 \<= \>>
fromPolar
\<<
\> r \Gh
\<<
\Gh SIN r *
\Gh COS r *
\>>
\>>
r = 1
EQ
\<<
Y X toPolar
OVER
2 * \pi *
r / +
fromPolar
vstrip
\>>
Now this turns out to be very slow. Moreover I received an "Insufficent Memory" error and had to plot the image in several runs. Not exactly what you want.
Still I hope these examples might be inspiring.
Best regards
Thomas
