[Scilab-users] for-loop error

[anna28]

Hello all,
I'm facing a trouble with a (in principle) very basic script... but I really
don't understand the reason.

Inside a bigger script, I have the following code:

"Nentries=283;
Nticks=20;
Nstep=15;
for j=1:Nticks
    k=j*Nstep;
    disp("j="+string(j)+"; Nstep="+string(Nstep)+"; k="+string(k)+"
j*Nstep="+string(j*Nstep));
    if(k<=Nentries) then
        str1=strsplit(matrix(k,1),[11,20])(2);
        str2 = strsubst(str1, "_","=");
    else
        str2="=";
    end
    tick_array_step_rot(j)="$\text {\rotatebox{90}{"+str2+"}}$"
end"

where "matrix" is a 283x5 string matrix.

It usually works, but it sometimes gives me error of "invalid index" at the
line of "str1". That's why I asked  to "disp" all the indexes and I find the
following output:

 j=1; Nstep=18; k=18 j*Nstep=18
 j=2; Nstep=18; k=36 j*Nstep=36
 j=3; Nstep=18; k=54 j*Nstep=54
 j=4; Nstep=18; k=72 j*Nstep=72
 j=5; Nstep=18; k=90 j*Nstep=90
 j=6; Nstep=18; k=108 j*Nstep=108
 j=7; Nstep=18; k=126 j*Nstep=126
 j=8; Nstep=18; k=-112 j*Nstep=-112

If I change the matrix and the number of rows, I detect similar problems: at
a certain point, the multiplication j*Nstep gets wrong.

Do you have any suggestions?

many thanks
Anna



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