CODEWITHSUNDEEP
pythoncorrelation
albusdemens
albusdemens

Reputation: 6624

Modules for correlate2d in Python

I want to calculate the correlation between two matrices using correlate2d (code: corr = correlate2d(im, im, fft = True)).

correlate2d was part of scipy and is now under stsci_python.

Currently I am loading modules as follows: 

import scipy
from scipy import *
import numpy as np
import stsci
from stsci import *

I get the error name 'correlate2d' is not defined. What modules do I need to load for this?

Upvotes: 2

Views: 1356

Answers (2)

Aldo
Aldo

Reputation: 388

SciPy has correlate2d in the signal sub-package:

import scipy.signal

followed by:

corr = scipy.signal.correlate2d(matrix1,matrix2)

SciPy sub-packages need to be imported separately; stsci may be the same.

-Aldo

Upvotes: 1

sjy
sjy

Reputation: 2732

Try this:

from scipy.stsci.convolve import correlate2d

Or, if stsci is available as a top-level module:

from stsci.convolve import correlate2d

If you are going to do from stsci import * for other reasons (although that "is frowned upon, since it often causes poorly readable code"), then you can access the function as convolve.correlate2d without adding any new imports.

Upvotes: 0

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