In numpy, arrays may have a data-types containing fields, analogous to columns in a spreadsheet. An example is [(a, int), (b, float)], where each entry in the array is a pair of (int, float). Normally, these attributes are accessed using dictionary lookups such as arr['a'] and arr['b']. Record arrays allow the fields to be accessed as members of the array, using arr.a and arr.b.
numpy.recarray.fill() function fill the record array with a scalar value.
Syntax :
numpy.recarray.fill(value)Parameters:
value : [scalar] All elements of array will be assigned this value.Return : Output array filled with value.
Code #1 :
# Python program explaining # numpy.recarray.fill() method   # importing numpy as geek import numpy as geek   # creating input array with 2 different field in_arr = geek.array([(5.0, 2), (3.0, -4), (6.0, 9),],                      dtype =[('a', float), ('b', int)])   print ("Input array : ", in_arr)   # convert it to a record array, # using arr.view(np.recarray) rec_arr = in_arr.view(geek.recarray) print("Record array of float: ", rec_arr.a) print("Record array of int: ", rec_arr.b)   # applying recarray.fill methods # to float record array rec_arr.a.fill(5) print ("Output filled array : ", rec_arr.a)   # applying recarray.fill methods # to int record array rec_arr.b.fill(0) print ("Output filled array : ", rec_arr.b) |
Output:
Input array : [(5., 2) (3., -4) (6., 9)] Record array of float: [5. 3. 6.] Record array of int: [ 2 -4 9] Output filled array : [5. 5. 5.] Output filled array : [0 0 0]
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Code #2 :
We are applying numpy.recarray.fill() to whole record array.
# Python program explaining # numpy.recarray.fill() method   # importing numpy as geek import numpy as geek   # creating input array with 2 different field in_arr = geek.array([[(5.0, 2), (3.0, 4), (6.0, -7)],                      [(9.0, 1), (6.0, 4), (-2.0, -7)]],                      dtype =[('a', float), ('b', int)])   print ("Input array : ", in_arr)   # convert it to a record array, # using arr.view(np.recarray) rec_arr = in_arr.view(geek.recarray)   # applying recarray.fill methods to record array rec_arr.fill(0)   print ("Output filled array : ", rec_arr) |
Output:
Input array : [[( 5., 2) ( 3., 4) ( 6., -7)] [( 9., 1) ( 6., 4) (-2., -7)]] Output filled array : [[(0., 0) (0., 0) (0., 0)] [(0., 0) (0., 0) (0., 0)]]
