creating a frame(image), randn

Hi

Does

a = sqrt(3)*randn(20,20)
imshow(a,([ ]))

create a frame(image), with 20x02 pixels, size of each pixel being 1x1, and the values of the pixels representing a Gaussian with covariance '3', and the intensity of each pixel to be gray linear scale.

Thanks

P

Answer 1

[Image Analyst]

No. Try again. By the way, what do you mean by covariance? Do you mean variance or standard deviation instead?

[PChoppala]

Its standard deviation,

so would that be

a = 3*randn(20,20)

imshow(a, [ ])

Can you give me a hint on the above specifications i had mentioned?

[Image Analyst]

Like I said in your duplicate post, perhaps the Example in the help will be a sifficient hint:

Example 1

Generate values from a normal distribution with mean 1 and standard deviation 2:

r = 1 + 2.*randn(100,1);

[PChoppala]

Right, thanks!