[Scilab-users] for-loop error

[Rafael Guerra]

Hi,



Are you sure that all the strings in matrix have at least 20 characters?



PS:

Not related to the index issue but probably not a good idea to use a variable with same name as existing function matrix.



Regards,

Rafael





-----Original Message-----
From: users <users-bounces at lists.scilab.org> On Behalf Of anna28
Sent: Thursday, October 29, 2020 12:55 PM
To: users at lists.scilab.org
Subject: [Scilab-users] for-loop error



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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