# mvarp

Syntax

mvarp(X, window, [minPeriods])

Please see Moving Functions (m-functions) for the parameters and windowing logic.

Details

Calculate the moving population variances of X in a sliding window.

Examples

```\$ mvarp(1..6, 5);
[,,,,2,2]

\$ mvarp(1..6, 5, 2);
[,0.25,0.666666666666667,1.25,2,2]

\$ m=matrix(1 6 2 9 4 5, 11 12 18 23 21 10);
\$ m;
```

#0

#1

1

11

6

12

2

18

9

23

4

21

5

10

```\$ mvarp(m,3);
```

#0

#1

4.666666666666667

9.555555555555542

8.222222222222223

20.22222222222221

8.666666666666666

4.222222222222248

4.666666666666667

32.666666666666664

```\$ m=matrix(1 NULL 4 NULL 8 6 , 9 NULL NULL 10 NULL 2)
\$ m.rename!(date(2020.04.06)+1..6, `col1`col2)
\$ m.setIndexedMatrix!()
\$ mvarp(m,4d)
```

label

col1

col2

2020.04.07

0

0

2020.04.08

0

0

2020.04.09

2.25

0

2020.04.10

2.25

0.25

2020.04.11

4

0

2020.04.12

2.6667

16

```\$ mvarp(m,1w)
```

label

col1

col2

2020.04.07

0

0

2020.04.08

0

0

2020.04.09

2.25

0

2020.04.10

2.25

0.25

2020.04.11

8.2222

0.25

2020.04.12

6.6875

12.6667

Related function: mvar