column wise adding

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mahaveer hanuman
mahaveer hanuman 2011-6-8
i had y= 1 6 4 7 5 3 6 4 9 n so on... i want yout=1+6+4 7+5+3 6+4+9

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回答（1 个）

Andrei Bobrov
Andrei Bobrov 2011-6-8
doc reshape
doc sum
yout = sum(reshape(y,3,[]));
EDIT
z = sum((x-y).^2,2);
  2 个评论
mahaveer hanuman
mahaveer hanuman 2011-6-8
i mean i have:
y(0)= 1 2 5
y(1)= 3 5 7
y(2)= 2 6 4
x(0)= 1 -2 7
x(1)= 3 5 4
x(2)= 2 -6 2
now i need output as:
z(0)=(1-1)^2+(2+2)^2+(5-7)^2
z(0)=20
and so on for z(1),z(2).
please help!!
David Young
David Young 2011-6-8
y(0) = 1 2 5 does not make sense. First because MATLAB array indexes start from 1; second because if y is a numerical array each element must contain a single value, not 3 values. Please can you clarify what you want to do?

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