Skip to main content

All Questions

28 questions with no upvoted or accepted answers
1vote
1answer
44views

IndexError: an index can only have a single ellipsis ('...')

I have the following numpy 4D array: import numpy as np X = np.random.rand(5, 1, 10, 4) # so for example, first 2 elements: X[:2] array([[[[0.27383924, 0.48908027, 0.64997038, 0.20394247], [...
Amina Umar's user avatar
1vote
1answer
82views

Sort numpy array with many dimensions, leaving contained 2d blocks intact

i hope someone can help me. I have a numpy array with 5 dimensions: my_array = {ndarray: (256,256,256,4,3,3)} I want to sort it by the last dimension(4), leaving intact the 3x3 blocks. Put ...
duckduckno's user avatar
1vote
1answer
163views

Reshape ndarray broadcasting values to new axis

Assume that I have an array with shape (6, 4, 512, 512) and I have another array of shape (6, 512, 512). How could I reshape the second array so it has the same shape as the first one? Also, would ...
rober_dinero's user avatar
1vote
4answers
91views

Python reshaping an array

This is a pretty specific question. I have this array: x = np.array([[[-3, 0], [0, 0]], [[0, 0], [0, -3]], [[2, 0], [0, 0]], [[-3, 0], [0, 0]]]) [[[-3 0] [ 0 0]] [[ 0 0] [ 0 -3]] [[2 0] [...
AyeTown's user avatar
1vote
0answers
67views

Why do some elements in list of lists get converted into float datatype, but some do not?

This is the code where I am reading a csv file to convert into a list of lists so that I can then convert the list of lists into numpy array. These are the columns in the csv file: pickup_year: The ...
Jyotsna Masand's user avatar
1vote
2answers
166views

Make with numpy an array that contains every cell its index multiplication, without loops

I want to make a function which get an int called "n" (4 for example), and make with it a numpy array which every cell contains its index multiplication. I want to make it without any loops. For ...
MorDar's user avatar
1vote
1answer
302views

Fastest iteration over 2 dimensions in python

Which is the fastest way to iterate over a 2 dimension array in python? Considering i always need x and y indexes. Example, i have this code that tries to 'match' 3 of the same number in a matrix, if ...
LaioZatt's user avatar
0votes
1answer
74views

Fix this numpy-function so it accepts multidimensional inputs

I am trying to compute the following function: geo-decay-function: in numpy, has to be vectorized. The catch in this case is that it should work for multidimensional inputs. E.g., x having dimensions ...
rutkov's user avatar
0votes
1answer
126views

Mean absolute value along all columns of a 3D Numpy array

I always get find myself in state of confusion when dealing with a multi-dimensional array. Imaging having the following array of arrays, where each array contains feature importance scores (3-...
Amina Umar's user avatar
0votes
0answers
31views

Selecting Array Values With A Separate Array of Indices

I am attempting to index a stacked 3-D Numpy array (named stack) by a group of 2-D indices contained inside of a separate Numpy array (named piece). The separate array contains several groups of 2-D ...
TornadoEric's user avatar
0votes
1answer
80views

move/translate values of 2d array by a specific amount (up)

I would like to understand various 2d array translation approaches. I have a method which returns a list of (x, y) coordinate indexes corresponding to values that should be deleted in the 2d array. ...
zccafa3's user avatar
0votes
0answers
50views

How to extract common elements from nD numpy arrays? Tried but it's not efficient

I have a NumPy array that looks similar to the pythonic list of lists of lists (if I am correct to say lists twice) given as below: tempo= [ array([[ 3, 9],[12, 16],[19, 20]], dtype=int64), ...
knowledge_seeker's user avatar
0votes
2answers
187views

How to delete a specific element from a numpy nd array?

I am working on nd-arrays whose dimensions can vary. I want to delete specific elements from the array given its index. like x = [[1,2,3],[4,5,6]] index = (0,0) I am expecting to get the result as ...
Allwin's user avatar
0votes
0answers
65views

Optimising array assignment in Numpy

What I have is an image-building function that takes "rects" which are arrays of 8 elements, all in range 0-1. Then, they are converted from 0-1 to real coordinates using the target Width ...
Hypergardens's user avatar
0votes
1answer
24views

Aggregating labels of array for which corresponding input array contains all zero rows of input

I am having a multi-dimensional numpy array of input such as this: X = np.array([ [[[1.0, 1.0, 1.0], [1.0, 3.0, 1.0], [0.0, 0.0, 0.0], [0.0, 0.0,...
arilwan's user avatar
  • 4,003

153050per page
close