How to swap two rows of an array?
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# How to swap two rows of an array?

This recipe helps you swap two rows of an array

0

## Recipe Objective

While handling arrays,we might desire to swap rows for matrix calculation.

So this recipe is a short example on how to swap two rows in an array. Let's get started.

## Step 1 - Import the library

``` import numpy as np ```

Let's pause and look at these imports. Numpy is generally helpful in data manipulation while working with arrays. It also helps in performing mathematical operation.

## Step 2 - Defining random array

``` a = np.array([[4,3, 1],[5 ,7, 0],[9, 9, 3],[8, 2, 4]]) print(a) ```

We have a defined a random array.

## Step 3 - Swapping and visualizing output

``` a[[0, 2]] = a[[2, 0]] print(a) ```

Simply using row transformation, we have swapped row 2 with row 0. Finally, we have printed the array using print function.

## Step 4 - Lets look at our dataset now

Once we run the above code snippet, we will see:

```Scroll down the ipython notebook to visualize the output.
```

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