Calculate the sum of these two vectors using loops. Can't use sum()

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Eric
Eric 2015-4-9
评论： Torsten 2015-4-9
Use loops to calculate the sum of two row vectors a & b, each of dimension 9. c(i)=a(i) + b(i) for i=1:9;
My current code looks like this:
clear;
a=zeros(1,9);
b=zeros(1,9);
c=zeros(1,9);
for i=1:9;
c(i)= a(i)+ b(i);
end;
disp(c);

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回答（4 个）

Torsten
Torsten 2015-4-9
Your code is ok although you just could have set
c=a+b;
I wonder why you are supposed to use a loop.
Best wishes
Torsten.
Eric
Eric 2015-4-9
My output is just not right though.
output:
0 0 0 0 0 0 0 0 0
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Torsten
Torsten 2015-4-9
You have
a=[0 0 0 0 0 0 0 0 0]
b=[0 0 0 0 0 0 0 0 0]
What you do in the loop is to sum a and b componentwise, thus
c=[0+0 0+0 0+0 0+0 0+0 0+0 0+0 0+0 0+0]
and the result is
c=[0 0 0 0 0 0 0 0 0]
Best wishes
Torsten.

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Eric
Eric 2015-4-9
Ok, but I'm trying to replace the values of zero with 1,2,3...9, so how do I replace the loop to sum numbers 1:9
Sorry if my question wasn't clear enough.
Eric
Eric 2015-4-9
I attached the question to make things more clear

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