can't solve matrix dimensions error with noise signal

I'm trying to add uniformal distributed noise to a speech signal and just dont know how to solve this error

Error using +

Matrix dimensions must agree.

x-the speech signal

nos-the noise signal

clear all;close all;clc
[x,Fs,Nbits] = wavread('jennifer.wav');
t = 0:0.001:512;
f = 45:55;
nos = sum(sin(2*pi*f'*t));
figure(1)
plot(t, nos)
grid
axis([0 2 -4 4]);
y=x+nos;

[Star Strider]

Context: how can i add Uniform distributed noise between 44-55 [hz] to a speech signal?

Answer 1

[Walter Roberson]

Your t is size 512001 -- remember that when you have 0:N that the length of that is N+1

Your f is size 11, but you sum along the dimension implied by f, so your nos comes out 1 x 512001 -- a row vector.

Your x is going to be a column vector.

In R2016a and earlier, if you attempt to add a column vector and a row vector, that would be an error. In R2016b and later, the effect would be the same as

bsxfun(@plus, x, nos)

which would return a length(x) by 512001 array; it seems unlikely that is what you want.

I would suggest

t = (0 : length(x)-1) / Fs;
f = 45:55;
nos = sum(sin(2*pi*f'*t));
y = x + nos(:);

[rivaldo rivaldo]

the same error :/