# isIndexedMatrix {#isindexedmatrix}

**Parent topic:**[Functions](../../Functions/category.md)

## Syntax {#syntax}

`isIndexedMatrix(X)`

## Arguments {#arguments}

**X** is a matrix.

## Details {#details}

Determine if *X* is an indexed matrix.

## Examples {#examples}

```
m=matrix(1..10, 11..20)
m.rename!(2020.01.01..2020.01.10, `A`B);

isIndexedMatrix(m);
// output: false

m.setIndexedMatrix!()
isIndexedMatrix(m);
// output: true
```

