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# NumPy | asarray method

schedule Aug 10, 2023
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Numpy's `asarray(~)` method constructs a Numpy array out of the provided object, which is typically a list or a tuple.

# Parameters

1. `a` | `array-like`

An array-like objects (e.g. typically lists and tuples) used to construct the Numpy array.

2. `dtype` | `string` or `type` | `optional`

Type of data stored in the Numpy array. By default, type will be inferred.

# Return value

A Numpy array with the data-type as specified.

# Examples

## Creating Numpy array using list

``` np.asarray([1,2,3]) array([1, 2, 3]) ```

The inferred type of the data is `int`.

## Creating Numpy array using tuple

``` np.asarray((1,2,3)) array([1, 2, 3]) ```

## Creating Numpy array with explicit type

``` np.asarray((1,2,3), float)np.asarray((1,2,3), "float") array([1., 2., 3.]) ```

Notice how we have `1.` instead of just `1` - this means that the data in the Numpy array is of type `float` instead of `int`. You can also provide the `dtype` in string form, like `"float"`.

## Creating 2D Numpy array

``` np.asarray([[1, 2, 3], [4, 5, 6]]) array([[1, 2, 3], [4, 5, 6]]) ```
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