column wise adding

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

Answer 1

[Andrei Bobrov]

doc reshape
doc sum

yout = sum(reshape(y,3,[]));

EDIT

z = sum((x-y).^2,2);

[mahaveer hanuman]

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]

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?