urgent help please :::::( how can ı solve this ?

mu=[1 1]';
p=0;
sigma=[1 2*p;2*p 4];
x= mu+sigma.*randn(1000,2);

this code gives me inner product error.

[Walter Roberson]

Duplicates http://www.mathworks.com/matlabcentral/answers/274134-urgent-i-can-not-fix-this-error-error-using-inner-matrix-dimensions-must-agree-on-this-co . Please discuss the question there, not here.

[Adam]

Putting "urgent" in a question title is more likely to just irritate people than persuade them to answer your question quickly. Everyone's work is urgent to themselves and not to anyone else. People will help if and when they can, irrespective of how urgent something is.

Answer 1

[Torsten]

sigma is (2x2) and randn(1000,2) is (1000x2), so sigma*randn or sigma.*randn are not defined.

Best wishes

Torsten.

Answer 2

[Guillaume]

1. You need to be aware of the difference between element-wise multiplication and matrix multiplication
2. Note the presence of i in the formula of the transformation. It is significant. To make x, you're either going to have to use a loop or bsxfun with some reshaping (with permute) of y.