La función numpy.insert() inserta valores a lo largo del eje mencionado antes de los índices dados. Sintaxis:
numpy.insert(array, object, values, axis = None)
Parámetros:
array : [array_like]Input array. object : [int, array of ints]Sub-array with the index or indices before which values is inserted values : [array_like]values to be added in the arr. Values should be shaped so that arr[...,obj,...] = values. If the type of values is different from that of arr, values is converted to the type of arr axis : Axis along which we want to insert the values. By default, it object is applied to flattened array
Devolver :
An copy of array with values being inserted as per the mentioned object along a given axis.
Código 1: eliminación de array 1D
Python
# Python Program illustrating # numpy.insert() import numpy as geek #Working on 1D arr = geek.arange(5) print("1D arr : \n", arr) print("Shape : ", arr.shape) # value = 9 # index = 1 # Insertion before first index a = geek.insert(arr, 1, 9) print("\nArray after insertion : ", a) print("Shape : ", a.shape) # Working on 2D array arr = geek.arange(12).reshape(3, 4) print("\n\n2D arr : \n", arr) print("Shape : ", arr.shape) a = geek.insert(arr, 1, 9, axis = 1) print("\nArray after insertion : \n", a) print("Shape : ", a.shape)
Producción :
1D arr : [0 1 2 3 4] Shape : (5,) Array after insertion : [0 9 1 2 3 4] Shape : (6,) 2D arr : [[ 0 1 2 3] [ 4 5 6 7] [ 8 9 10 11]] Shape : (3, 4) Array after insertion : [[ 0 9 1 2 3] [ 4 9 5 6 7] [ 8 9 9 10 11]] Shape : (3, 5)
Código 2: Trabajar con escalares
Python
# Python Program illustrating # numpy.insert() import numpy as geek # Working on 2D array arr = geek.arange(12).reshape(3, 4) print("2D arr : \n", arr) print("Shape : ", arr.shape) # Working with Scalars a = geek.insert(arr, [1], [[6],[9],], axis = 0) print("\nArray after insertion : \n", a) print("Shape : ", a.shape) # Working with Scalars a = geek.insert(arr, [1], [[8],[7],[9]], axis = 1) print("\nArray after insertion : \n", a) print("Shape : ", a.shape)
Producción :
2D arr : [[ 0 1 2 3] [ 4 5 6 7] [ 8 9 10 11]] Shape : (3, 4) Array after insertion : [[ 0 1 2 3] [ 6 6 6 6] [ 9 9 9 9] [ 4 5 6 7] [ 8 9 10 11]] Shape : (5, 4) Array after insertion : [[ 0 8 1 2 3] [ 4 7 5 6 7] [ 8 9 9 10 11]] Shape : (3, 5)
Código 3: Inserción en diferentes puntos
Python
# Python Program illustrating # numpy.insert() import numpy as geek #Working on 1D arr = geek.arange(6).reshape(2, 3) print("1D arr : \n", arr) print("Shape : ", arr.shape) # value = 9 # index = 1 # Insertion before first index a = geek.insert(arr, (2, 4), 9) print("\nInsertion at two points : ", a) print("Shape : ", a.shape) # Working on 2D array arr = geek.arange(12).reshape(3, 4) print("\n\n2D arr : \n", arr) print("Shape : ", arr.shape) a = geek.insert(arr, (0, 3), 66, axis = 1) print("\nInsertion at two points : \n", a) print("Shape : ", a.shape)
Producción :
1D arr : [[0 1 2] [3 4 5]] Shape : (2, 3) Insertion at two points : [0 1 9 2 3 9 4 5] Shape : (8,) 2D arr : [[ 0 1 2 3] [ 4 5 6 7] [ 8 9 10 11]] Shape : (3, 4) Insertion at two points : [[66 0 1 2 66 3] [66 4 5 6 66 7] [66 8 9 10 66 11]] Shape : (3, 6)
Referencias: https://docs.scipy.org/doc/numpy/reference/generated/numpy.insert.html#numpy.insert Nota: estos códigos no se ejecutarán en IDE en línea. Ejecútelos en sus sistemas para explorar el funcionamiento. Este artículo es una contribución de . Si te gusta GeeksforGeeks y te gustaría contribuir, también puedes escribir un artículo usando write.geeksforgeeks.org o enviar tu artículo por correo a review-team@geeksforgeeks.org. Vea su artículo que aparece en la página principal de GeeksforGeeks y ayude a otros Geeks. Escriba comentarios si encuentra algo incorrecto o si desea compartir más información sobre el tema tratado anteriormente.
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Artículo escrito por GeeksforGeeks-1 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA