/Python/Python use negation with maskedarray

Python use negation with maskedarray

import numpy
data = numpy.array([[ 1, 2, 5 ]])
mask = numpy.array([[0,1,0]])

numpy.ma.masked_array(data, ~mask) 
# note this probably won't work right for non-boolean (T/F) values

# or
numpy.ma.masked_array(data, numpy.logical_not(mask))


# for example

>>> a = numpy.array([False,True,False])
>>> ~a
array([ True, False,  True], dtype=bool)
>>> numpy.logical_not(a)
array([ True, False,  True], dtype=bool)
>>> a = numpy.array([0,1,0])
>>> ~a
array([-1, -2, -1])
>>> numpy.logical_not(a)
array([ True, False,  True], dtype=bool)

Source: stackoverflow.com

Similar codes

3 votes133 views3 answers
Load saved model
Python
15 votes133 views3 answers
How to delete in python
Python
0 vote123 views1 answer
A = [ int(i) for i in range(100, 104)] list python
Python
0 vote137 views1 answer
To visualize the correlation between any two columns | scatter plot graph
Python
0 vote119 views1 answer
How to select li element in selenium python
Python
10 votes115 views10 answers
Python Program to capitalize a string
Python
3 votes130 views3 answers
How to take matrix input in python
Python
0 vote129 views1 answer
R Return each result with an index
Python
0 vote153 views4 answers
Select series of columns
Python
0 vote131 views1 answer
Create a python file and import it as library in other file
Python