a=rand(400), this function generates 400*400 random matrix a,how could generate matrix a with specified mean and variance.
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a=rand(400), this function generates 400*400 random matrix a,how could generate matrix a with specified mean and variance in matlab.
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Image Analyst
2012-12-24
If a poster honestly admits it's homework, then we will give hints rather than full solutions so they can't be accused of plagiarizing, and won't feel guilty about turning in someone else's code as their own. It appears that you imply this is not your homework, so don't worry about it.
回答(1 个)
Andrei Bobrov
2012-12-24
编辑:Andrei Bobrov
2012-12-24
m - your mean
s - your variance
size_matrix - size of your array < a x b > , size_matrix = [a,b];
fun1 = @(m,s,size_matrix) m + sqrt(s)*randn(size_matrix)
use function fun1, eg:
>> fun1(1,2,[3,2])
if you have Statistics Toolbox, use function normrnd:
>> normrnd(m,sqrt(s),size_matrix);
6 个评论
Image Analyst
2012-12-24
Yes I know I answered a different question from you in a different discussion but the comment I made here was related to this discussion. Usually people care about what shape their noise distribution takes and I was just wondering why you don't, because it has a huge impact on the results. But whatever, as long as you think you have a solution....
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