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+--- Thread: Object behaviour in CAS programming (/thread-6405.html)
Object behaviour in CAS programming - Tonig00 - 06-12-2016 01:13 PM
Hello
I just want to program an easy way to calculate de characteristic polynomial of a map.
In CAS mode I do the first steps very easily, I will put an example:
[[1 2],[3 7]]:=a // Asign the matrix to a variable "a"
Then I check that another variable does not exist, like for example "t"
Then I create an identity matrix of the same dimension as a and multiply by this variable:
IDENMAT(ColDim(a))*t:=tId
This product is done without problems because in CAS mode "t" is considered TYPE 8.
But if I write a progrma doing this simple multiplication it does not work either for:
1.- If I delcare the variable as LOCAL then the value is 0 and the result obviously wrong.
2.- If I do not declre the program gives an error.
Does some body knows how to avoid this problem?
Thanks in advance for your help
Just a little bug is sombody is interested:
In Spreadsheet APP if you put in a column title: =coeff(expand(x+1)^row)
then the calculator gives some extrange symbols or just blocked
RE: Object behaviour in CAS programming - cyrille de brébisson - 06-13-2016 04:59 AM
Hello,
You have to do the operation in a CAS part of the program.
You can declare a CAS section in a program by using the #cas and #end section.
Cyrille
RE: Object behaviour in CAS programming - Tonig00 - 06-14-2016 08:48 PM
Thanks very much for your answer.
I heve put this and it Works:
#cas
Su_Prop(m.l);=
BEGIN
LOCAL m1;
m-(l*IDENMAT(COLdIM(M))):=m;
return m;
END;
#end