use of eval in loop, Index exceeds matrix dimensions.

Hi,

I have 250 decision trees in a dataset called c1 .. c250

I am trying to use the isbranch function in a loop.

This is the code:

for i = 1:250

        STR = sprintf('isbranch(c%d)',i);

        branches = eval(STR);
end;

I used eval before to use these trees, and no error was showing then. Now I keep getting the error:

Index exceeds matrix dimensions.

Any suggestions would be welcome.

Thanks,

Michiel

[Oleg Komarov]

One reason to avoid eval(). Use dynamic field indexing of structures.

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

[per isakson]

Are "c1 .. c250" objects of the class, classregtree?

[per isakson]

How does the full error message read?