Sometimes you want to resize the NumPy array according to your dimension need. There is a function in NumPy to do so and that is * numpy.resize()*. Just put any array shape inside the method. And then define how many rows or columns you want, NumPy will convert to that dimension. In this entire tutorial I will show you the implementation of

*using various examples.*

**np.resize()**## Syntax of the the numpy.resize() method.

`numpy.resize(a, new_shape)`

**Explanation of Parameters**

**a:** *It is your input array of any shape.*

**new_shpape:** *New shape of the array you want to return.*

The method will return an array with the new shape you have defined.

## Steps to Resize Numpy Array

### Step 1: Import the required library.

I am using only the NumPy array. So let’s import them,

`import numpy as np`

### Step 2: Follow the following Examples to Resize Numpy Array

#### Example 1: Resizing a Single Dimension Numpy Array

Let’s create a sample 1D Numpy array and resize it using the * resize()* method.

`array_1d= np.array([1,2,3,4,5,6,7])`

Suppose I want to change the dimension of the above array to 3 rows and 2 columns. Then I will pass* (3,2)* as an argument of the

*method.*

**resize()**`np.resize(array_1d,(3,2))`

**Output**

In the same way, I can create a NumPy array of 3 rows and 5 columns dimensions. Just Execute the given code.

`np.resize(array_1d,(3,5))`

**Output**

### Example 2: Resizing a Two Dimension Numpy Array

Now you have understood how to resize as Single Dimensional array. In this section, you will learn to resize a NumPy array of two dimensions. Let’s create a Sample 2 D Array.

`array_2d = np.array([[1,2,3],[4,5,6],[7,8,9]])`

**Output**

Now I want to change the 2 D array into the shape of 2 rows and 2 columns. So, I will pass (2,2) as an argument. Run the code given below.

`np.resize(array_2d,(2,2))`

**Output**

You can see the created 2D Array is of size 3×3. Using the NumPy resize method you can also increase the dimension. For example, I want 5 rows and 7 columns then I will pass (5,7) as an argument.

`np.resize(array_2d,(5,7))`

**Output**

## Conclusion

Numpy resize is a very useful function if you want to change the dimension of the existing array. Many readers must be thinking that NumPy * reshape()* method also do exactly like the

*method. Yes, they do. But there is a major difference among them. And the difference is that reshape() changes the dimension that is temporary. But in the case of*

**resize()***changes are permanent*

**resize()***.*

I hope this article has cleared your understanding of how to resize the NumPy array. If you want to know more about it then you can contact us.

**Source:**

#### Join our list

Subscribe to our mailing list and get interesting stuff and updates to your email inbox.