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creating a frame(image), randn

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PChoppala
PChoppala 2011-10-13
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

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Image Analyst
Image Analyst 2011-10-13
No. Try again. By the way, what do you mean by covariance? Do you mean variance or standard deviation instead?
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Image Analyst
Image Analyst 2011-10-13
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);

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