Strings vs Char and array indices

Why do I keep getting this error message? 

Array indices must be positive integers or logical values.

Error in movies_by_country (line 3)

if strlength(movies(ii).countries) >= strlength(movies(ii-1).countries)

Answer 1

[Ameer Hamza]

I guess in your code, the variable ii starts from 1 which try to read

strlength(movies(0).countries)

In MATLAB the array indexes start from 1, so it gives an error.

[James Metz]

so instead of writing strlength(movies(ii-1).countries) how can I write it so that the function compares the new ii-th iteration to the previous ii-th iteration?

[Ameer Hamza]

starts the for loop from 2 like this

for ii=2:numel(movies)

[James Metz]

Ok thanks!

[Ameer Hamza]

Glad to be of help.