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How to create a for loop to do sums of every values in the whole row?

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Darkhan Kenestegi
Darkhan Kenestegi 2016-12-15
评论： Darkhan Kenestegi 2016-12-15
I have a matrix lets say a=[1,2,3;9,8,7;4,5,6]
I want to create a loop that will sum each row, like:
sum(a(1,:));
The problem is I want it to be repeated for every row.
Will appreciate any help! Cheers!

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KSSV
KSSV 2016-12-15
a=[1,2,3;9,8,7;4,5,6] ;
b = zeros(size(a,2),1) ;
for i = 1:size(a,2)
b(i) = sum(a(i,:)) ;
end
b
b1 = sum(a,2)
  2 个评论
Darkhan Kenestegi
Darkhan Kenestegi 2016-12-15
Thank you! But I get an error in my original code "index exceeds matrix dimensions". In my case I have 15 rows and 186 columns. Maybe My initial example was easier due to 3x3 matrix, but now we have irregular matrix.
Darkhan Kenestegi
Darkhan Kenestegi 2016-12-15
Oh it's fine! I figured it out! I just changed conditions to for i = 1:size(a,1)
And that seems to solve the problem.
Thank you for your help.

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