chi2stat (Statistics Toolbox)

Mean and variance for the chi-square (²) distribution

Syntax

```
[M,V] = chi2stat(NU)
```

Description

[M,V] = chi2stat(NU) returns the mean and variance for the ² distribution with degrees of freedom parameters specified by NU.

The mean of the ² distribution is , the degrees of freedom parameter, and the variance is 2.

Example

nu = 1:10;
nu = nu'*nu;
[m,v] = chi2stat(nu)
m =
 1     2     3     4     5     6     7     8     9    10
 2     4     6     8    10    12    14    16    18    20
 3     6     9    12    15    18    21    24    27    30
 4     8    12    16    20    24    28    32    36    40
 5    10    15    20    25    30    35    40    45    50
 6    12    18    24    30    36    42    48    54    60
 7    14    21    28    35    42    49    56    63    70
 8    16    24    32    40    48    56    64    72    80
 9    18    27    36    45    54    63    72    81    90
10    20    30    40    50    60    70    80    90   100
v =
 2     4     6     8    10    12    14    16    18    20
 4     8    12    16    20    24    28    32    36    40
 6    12    18    24    30    36    42    48    54    60
 8    16    24    32    40    48    56    64    72    80
10    20    30    40    50    60    70    80    90   100
12    24    36    48    60    72    84    96   108   120
14    28    42    56    70    84    98   112   126   140
16    32    48    64    80    96   112   128   144   160
18    36    54    72    90   108   126   144   162   180
20    40    60    80   100   120   140   160   180   200

chi2rnd classify