MATLAB Function Reference |

Sparse normally distributed random matrix

**Syntax**

**Description**

```
R = sprandn(S)
```

has the same sparsity structure as `S`

, but normally distributed random entries with mean `0`

and variance `1`

.

```
R = sprandn(m,n,density)
```

is a random, `m`

-by-`n`

, sparse matrix with approximately `density*m*n`

normally distributed nonzero entries `(0`

`<=`

`density`

`<=`

`1)`

.

```
R = sprandn(m,n,density,rc)
```

also has reciprocal condition number approximately equal to `rc`

. `R`

is constructed from a sum of matrices of rank one.

If `rc`

is a vector of length `lr`

, where `lr <= min(m,n)`

, then `R`

has `rc`

as its first `lr`

singular values, all others are zero. In this case, `R`

is generated by random plane rotations applied to a diagonal matrix with the given singular values. It has a great deal of topological and algebraic structure.

**See Also**

sprand | sprandsym |