how to sum of column without sum function in a unit metrix

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MD Anower Hossain
MD Anower Hossain 2019-9-21
评论： Matt J 2019-9-21
x1 = [1 2 3; 4 5 6; 7 8 9];
all =(x1);
summa=0;
count = 0;
for i=1:length(all)
% fprintf("%d\n",i);
summa = 0;
for j = 1:length(all)
summa = summa + all(j);
% fprintf("%d ",j);
end
fprintf("%d ",summa);
end
I want to sum every column without sum function , i tried it but i can't can anyone help me please ?

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采纳的回答

Matt J
Matt J 2019-9-21
summa = summa + all(j,i);
  2 个评论
MD Anower Hossain
MD Anower Hossain 2019-9-21
can you please describe it why you use all(j,i); why j and i ? i used only j .
Matt J
Matt J 2019-9-21
Without this, "i" is not used anywhere. Why did you include a loop over "i" if you are not going to use it?

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