creating a frame
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Hi
Want to clarify a simple doubt I have, which was posted earlier, but had not got a reply.
Does
a = randn(20,20)
imshow(a, [ ])
create a frame with 20x20 pixel, size of each pixel being 1x1, the values of the pixels are Gaussian and the intensity(values of the pixels) are gray linear scale?
Does
a = 3*randn(20,20)
imshow(a, [ ])
create a frame with the same specifications, now that the values are Gaussian with a standard deviation of '3'??
Awaiting your advice
Cheers
P
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回答 (1 件)
Walter Roberson
2011 年 10 月 14 日
No, and No.
randn() cannot produce numbers beyond +/- realmax. No fixed finite range of numbers can have a gaussian distribution. A gaussian distribution has an infinite tail, always.
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