Noise creation with direction

Hello, I am trying to create a one second noise in direction (az = 60 deg, el = 0 deg).

I want to create it in time and frequecy domain.

How do I go about it?

Thanks

[Walter Roberson]

Are you referring to in an image? Or is this with a set of speakers, trying to determine the output? Or you are trying to simulate receiving such a noise with a set of microphones? Or is this radar?

[Image Analyst]

Can you just go to your window, open it, circle your hands around your mouth, and start shouting towards the sky? http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

[Walter Roberson]

That would create it in the time domain. I don't know what it means to create a timed noise in the frequency domain.

Answer 1

[Image Analyst]

You can do

row6 = your2DMatrix(6, :);

The 6 as the first argument means to take row 6. The : as the second index means "all columns". So together it means take "all columns in row 6" and put into a 1D row vector called row6.

[kyin gab]

Thanks.

Answer 2

[kyin gab]

Image Analyst and Walter Roberson thanks for the jokes.

I have created the 'noise' I was talking about. I wanted to use the rand function to create it. figured it out by reading from MatLab.

this is what I did (will try to explain for those that will be learning for the first time)

fs = 44100; %sampling frequency

t = 0:1/fs:1-1/fs; %i want it to last for one sec

%i want the noise to have +1(a) as highest and negative -1(b) as lowest amplitudes respectively % to do that set the terms before '.*' to a + (b - a)

noise = 1 + (-1-(1)).* rand(size(t)); % this will produce 1 sec noise signal.

Ok I have done that. I have another problem I am facing. I have a vector of 8 X 1024 double.

I want to select one row ie the 6th and all its content (1024) and assign it to a variable. How do I do that?

Thanks

[Walter Roberson]

What jokes? And where does the azimuth 60 come into your calculation?