How I can solve this kind of error?

and I am writing this code

[Rik]

How are you confirming comb5 actually has row+1 rows on the first iteration?

Answer 1

[Sobha T]

If comb5 is a one-dimensional array, then you can use : instead of ,

as shown below

comb5(row:end-1)

Answer 2

[Image Analyst]

Before the while loop, put this

[rows, columns] = size(comb5)  % Don't use a semicolon

what do you see? Chances are you have 1 row and several columns, so you can't reference comb5(1+1, end) because comb5 does not have 2 rows.