numpy.MaskedArray.atleast_1d()La función se utiliza para convertir entradas en arrays enmascaradas con al menos una dimensión. Las entradas escalares se convierten en arrays unidimensionales, mientras que las entradas de mayor dimensión se conservan.
Sintaxis:
numpy.ma.atleast_1d(*arys)Parámetros:
arys: [ array_like] Una o más arrays de entrada.Devuelve: [ ndarray] Una array, o lista de arrays, cada una con
arr.ndim >= 1
Código #1:
# Python program explaining
# numpy.MaskedArray.atleast_1d() method
# importing numpy as geek
# and numpy.ma module as ma
import numpy as geek
import numpy.ma as ma
# creating input arrays
in_arr1 = geek.array([[1, 2], [ 3, -1], [ 5, -3]])
print ("1st Input array : ", in_arr1)
in_arr2 = geek.array(2)
print ("2nd Input array : ", in_arr2)
# Now we are creating masked array.
# by making entry as invalid.
mask_arr1 = ma.masked_array(in_arr1, mask =[[ 1, 0], [ 0, 1], [ 0, 0]])
print ("1st Masked array : ", mask_arr1)
mask_arr2 = ma.masked_array(in_arr2, mask = 0)
print ("2nd Masked array : ", mask_arr2)
# applying MaskedArray.atleast_1d methods
# to masked array
out_arr = ma.atleast_1d(mask_arr1, mask_arr2)
print ("Output masked array : ", out_arr)
Producción:
1st Input array : [[ 1 2]
[ 3 -1]
[ 5 -3]]
2nd Input array : 2
1st Masked array : [[-- 2]
[3 --]
[5 -3]]
2nd Masked array : 2
Output masked array : [masked_array(
data=[[--, 2],
[3, --],
[5, -3]],
mask=[[ True, False],
[False, True],
[False, False]],
fill_value=999999), masked_array(data=[2],
mask=[False],
fill_value=999999)]
Código #2:
# Python program explaining
# numpy.MaskedArray.atleast_1d() method
# importing numpy as geek
# and numpy.ma module as ma
import numpy as geek
import numpy.ma as ma
# creating input array
in_arr = geek.array([[[ 2e8, 3e-5]], [[ -45.0, 2e5]]])
print ("Input array : ", in_arr)
# Now we are creating a masked array.
# by making one entry as invalid.
mask_arr = ma.masked_array(in_arr, mask =[[[ 1, 0]], [[ 0, 0]]])
print ("3D Masked array : ", mask_arr)
# applying MaskedArray.atleast_1d methods
# to masked array
out_arr = ma.atleast_1d(mask_arr)
print ("Output masked array : ", out_arr)
Producción:
Input array : [[[ 2.0e+08 3.0e-05]] [[-4.5e+01 2.0e+05]]] 3D Masked array : [[[-- 3e-05]] [[-45.0 200000.0]]] Output masked array : [[[-- 3e-05]] [[-45.0 200000.0]]]
Publicación traducida automáticamente
Artículo escrito por jana_sayantan y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA