How to make operator for random matrix(matlab command is randn) ? please help me

How to make operator for random matrix(matlab command is randn) ? please help me

Answer 1

[Star Strider]

If you want to create normally-distributed random variables with a standard deviation of s and a mean of m with randn, this will work:

nrmrnd = @(m,s) m + s*randn;

or if you want a row r by column c matrix of them:

nrmrnd = @(m,s,r,c) m + s*randn(r,c);

[SUMIT]

sir, actually i have a signal x of dimension n. Now we have to make a random matrix operator such that when we multiply this operator with the signal x then we have to get the result of multiplication randn(n,n)*x.

[Star Strider]

If as I assume x is a (1xn) column vector, then your multiplication is simply:

r = randn(length(x))*x;

The result, r will be a (1xn) column vector.

[SUMIT]

sir,this is not an operator. In your first comment you give the operator.I need that type of operator. Please help....

[Star Strider]

This function should work:

xrndn = @(x)  randn(length(x))*x(:);

Call it as:

y = xrndn(x);

for any vector x.