Unable to use a value of type string as an index

Where even is the string? I checked the datatypes of all the variables, and they're all either double or uint8.

[VBBV]

See the output what you get

size(catbl,1)

by typing in command window which you are using in for loop

[VBBV]

Did you assign any numeric value to x in catbl1(catbl1=x)=div*c; ? Change also the line to catbl1(catbl1==x)=div*c;

[VBBV]

If you don't have numeric value assigned to x it can also be problem

Answer 1

[Scott MacKenzie]

Inside your loop, change

catbl1(catbl1=x)=div*c;

to

catbl1(catbl1==x)=div*c;