my question is that

a=randn(400); generates 400*400 matrix in matlab,

my question is that this function generates different mean and variance matrix at every time when i run the code. so i require fix mean and variance matrix at every time when i run the code. (not a nearest,every time exact and fixed value)

Answer 1

[Azzi Abdelmalek]

nm=[400,400]
v=0.5; %variance
m=2; % mean
out=m+sqrt(v)*randn(nm)

[vipul utsav]

also i have tried this,but here,m and v is slightly change when i run the code more than one time,

[Azzi Abdelmalek]

What do you mean by it changes? 0.501 and 0.503 is that what you mean is changing? Bigger your matrix is, smaller will be the error

[vipul utsav]

0.5041 0.4958 0.4987 0.4975

[Azzi Abdelmalek]

The error is 1%. What is the desired precision ?

[vipul utsav]

ok, is there any idea for reduce this error or any other logic/function?