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# Return an array of ones with the same shape and type as a given array in Numpy

To return an array of ones with the same shape and type as a given array, use the **numpy.ones_like()** method in Python Numpy. The 1st parameter here is the shape and data-type of array-like that define these same attributes of the returned array.

The dtypes overrides the data type of the result. The order overrides the memory layout of the result. ‘C’ means C-order, ‘F’ means F-order, ‘A’ means ‘F’ if a is Fortran contiguous, ‘C’ otherwise. ‘K’ means match the layout of a as closely as possible.

The subok parameter, if True, then the newly created array will use the sub-class type of a, otherwise it will be a base-class array. Defaults to True.

## Steps

At first, import the required library −

import numpy as np

Create a new array using the numpy.array() method in Python Numpy −

arr = np.array([[35, 56, 66], [88, 73, 98]])

Display the array −

print("Array...\n",arr)

Get the type of the array −

print("\nArray type...\n", arr.dtype)

Get the dimensions of the Array −

print("\nArray Dimensions...\n", arr.ndim)

To return an array of ones with the same shape and type as a given array, use the numpy.ones_like() method in Python Numpy. The 1st parameter here is the shape and data-type of array-like that define these same attributes of the returned array −

newArr = np.ones_like(arr) print("\nNew Array..\n", newArr)

Get the type of the new array −

print("\nNew Array type...\n", newArr.dtype)

Get the dimensions of the new array −

print("\nNew Array Dimensions...\n", newArr.ndim)

## Example

import numpy as np # Create a new array using the numpy.array() method in Python Numpy arr = np.array([[35, 56, 66], [88, 73, 98]]) # Display the array print("Array...\n",arr) # Get the type of the array print("\nArray type...\n", arr.dtype) # Get the dimensions of the Array print("\nArray Dimensions...\n", arr.ndim) # To return an array of ones with the same shape and type as a given array, use the numpy.ones_like() method in Python Numpy # The 1st parameter here is the shape and data-type of array-like that define these same attributes of the returned array. newArr = np.ones_like(arr) print("\nNew Array..\n", newArr) # Get the type of the new array print("\nNew Array type...\n", newArr.dtype) # Get the dimensions of the new array print("\nNew Array Dimensions...\n", newArr.ndim)

## Output

Array... [[35 56 66] [88 73 98]] Array type... int64 Array Dimensions... 2 New Array.. [[1 1 1] [1 1 1]] New Array type... int64 New Array Dimensions... 2

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