multiplying a matrix

i have a matrix

A=[3 5 7

5 6 0

5 9 4]

i want to square each element and add along row wise and display

for ex

3^2+5^2+7^2

ans is 89

so i need as

89

71

122

pleas guide

[Chandra Kurniawan]

3^2+5^2+7^2 = 83, right?

5^2+6^2+0^2 = 61, right?

[FIR]

s chandra u r right

[FIR]

chandra can u tell how to calculate this

summation i=1 to n q^2ir ,where n=2

r=1:20

q is a matrix

[Chandra Kurniawan]

what size of q?

[FIR]

size of q is 2x20

[Andrei Bobrov]

sum(q(:,1:20).^2)

[Walter Roberson]

You require summing terms that are individually q^2ir . You cannot raise a matrix (e.g., q is 2 x 99) to a vector power (e.g., r is 1:20)

[Walter Roberson]

andrei, notice that both i and r also occur in the exponent.

[Chandra Kurniawan]

q = rand(2,20);

r = 1 : 20;

n = 2;

for i = 1 : n

rsl{i} = q(i,:).^2 .* i .* r;

end

Is this, right?

[Andrei Bobrov]

so?

i1 = 1:2;

r = 1:20;

out = sum(q.^(2*i1.'*r))

[FIR]

thanks chandra

[Chandra Kurniawan]

Okay. Glad to help you.

[Walter Roberson]

andrei, you cannot raise a matrix to a vector. You can raise a matrix to a scalar or a scalar to a matrix.

[FIR]

chandra can u tell how to process this am struch here for long

http://www.sendspace.com/file/scymbl

[Andrei Bobrov]

i1 = 1:2;

r = 1:20;

out = sum(q.^2.*(i1.'*r))

Answer 1

[Chandra Kurniawan]

A=[3 5 7;
   5 6 0;
   5 9 4];
for x = 1 : 3
    B(x,:) = sum(A(x,:).^2);
end
B

Answer 2

[Andrei Bobrov]

   B = sum(A.^2,2);