sprandn
A sparse matrix of specified size and the given density containing elements which are normally distributed numbers.
(y)=sprandn(rows, columns, density)
Inputs
rows The number of rows in the sparse matrix to be constructed
columns The number of columns in the sparse matrix to be constructed.
density The density of the sparse matrix to be constructed. A number less than one.


Description
The number of nonzero elements in the output is approximately density*rows*columns . The nonzero elements are normally distributed with mean 0 and standard deviation 1 .
Example
>>sprandn(30,30,.015)
        ( 5, 1)   -1.1923
       ( 12, 1)    1.4558
       ( 28, 5)   -0.0898
       ( 18, 6)   -1.4362
      ( 23, 10)   -0.0084
      ( 23, 11)   -1.1152
       ( 9, 12)    0.1994
      ( 15, 14)    1.4085
      ( 28, 14)   -0.1934
      ( 19, 19)   -0.9072
      ( 18, 20)    0.6373
       ( 2, 28)   -1.4672
      ( 29, 28)   -1.2407
      ( 23, 30)    1.9549