what's the wrong in this expression

what's the wrong in this expression

if(rr(i)>= l(i,1)&& rr(i)<=h(i,1))

when i run my program i have error in this expresion.i need to help me .thank you for all

[TADA]

Post the error details, all the red text you get in the command window

[Rik]

Have a read here (or here for more general advice). It will greatly improve your chances of getting an answer.

Answer 1

[Walter Roberson]

rr does not contain at least i elements, or else l does not contain at least i rows, or else h does not contain at least i rows, or else rr or h or l are functions that return something that is not a scalar.

Or there is a problem on a different line.