Accelerating the pace of engineering and science

# Documentation Center

• Trial Software
• Product Updates

# cast

Cast variable to different data type

## Syntax

B = cast(A,newclass)
B = cast(A,'like',p)

## Description

B = cast(A,newclass) converts A to class newclass, where newclass is the name of a built-in data type compatible with A. The cast function truncates any values in A that are too large to map into newclass.

B = cast(A,'like',p) converts A to the same data type and sparsity as the variable p. If A and p are both real, then B is also real. Otherwise, B is complex.

## Examples

expand all

### Convert Numeric Data Type

Convert an int8 value to uint8.

Define a scalar 8-bit integer.

`a = int8(5);`

Convert a to an unsigned 8-bit integer.

```b = cast(a,'uint8');
class(b)
```
```ans =
uint8```

### Match Data Type and Complex Nature of p

Define a single precision vector p that is complex valued.

`p = single([1+i 2]);`

Define a 2-by-3 matrix of ones.

`A = ones(2,3);`

Convert A to the same data type and complexity (real or complex) as p.

`B = cast(A,'like',p)`
```B =

1.0000 + 0.0000i   1.0000 + 0.0000i   1.0000 + 0.0000i
1.0000 + 0.0000i   1.0000 + 0.0000i   1.0000 + 0.0000i```

Check the class of B.

`class(B)`
```ans =

single```

## See Also

Was this topic helpful?