## error in using the sum function

### Eliraz Nahum (view profile)

on 27 Sep 2018
Latest activity Edited by Adam Danz

on 27 Sep 2018

I am getting an error I can't understand.
I attached the code and a photo.
thanks!
clear all
close all
clc
m=5; %number of groups
n=10 %size of each group
sz=[m n];
sum=0;
G=0+(100-0)*rand([sz]);
G1=G(1,:);
sum(G1);

jonas

### jonas (view profile)

on 27 Sep 2018
It can be quite useful to read the error message returned by MATLAB.
" 'sum' appears to be both a function and a variable. If this is unintentional, use 'clear sum' to remove the variable 'sum' from the workspace."

### Release

R2018a

on 27 Sep 2018

on 27 Sep 2018

You are defining a variable named sum here
sum=0;
and then later you try to index that variable by a vector of non-integers. It's like doing this:
v= 6;
v([310.15324, 235.3463, 501.346])
If you're trying to use the sum() function, you'll need to use a different variable name.

### ANKUR KUMAR (view profile)

on 27 Sep 2018

You have already defined sum as a variable
clc
clear
m=5; %number of groups
n=10 %size of each group
sz=[m n];
G=0+(100-0)*rand([sz]);
G1=G(1,:);
sum(G1)
sum(G,1)%along first dimension
sum(G,2) %along second dimension