How to sum columns of multiple matrices?

I have 32 column matrices of different names to be added separately. Is it possible to write a loop to do it instead of writing Sum1 = sum(VarName2)... and so on for 32 matrices?

I have matrices named VarName2, VarName3, ..., VarName33. I tried using the following loop;

for i = 1:32
sum(i)= sum(VarName(i));
end

and it returned the error "Undefined function or variable 'VarName'". So, needed help with this.

[per isakson]

See http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

Answer 1

[Niels]

final_sum=0;
for i= 1:32    % splitted command as string: sum(VarNamei)                          
    final_sum=final_sum + evalin('base', ['sum(VarName', num2str(i) ,')']);
end

the sum of all vectors (if sum is used on a matrix, the result will be a row vector) ...

just tell me if it works, i had no problem using it.

[Niels]

not calling any indices, you must have changed something in the code... if they run from 2:32 why did you change it to i=2:33?

i created VarName2 ... VarName33 and run the code without error.

what is the size of your matrices VarName2 and so one

[Niels]

chnged the code so that final_sum is a 32x1 vector where final_sum(i) contains the sum of VarName2+...VarNamei

final_sum    = zeros(32,1);
final_sum(1) = VarName2;
for i= 3:33    % splitted command as string: sum(VarNamei)                          
    final_sum(i-1) = final_sum(i-2) + evalin('base', ['sum(VarName', num2str(i) ,')']);
end

[Sashank Jammalamadaka]

Thank You, it worked!