All Questions
46 questions
4
votes
1
answer
78
views
Array Math to Calculate Ice Thickness -- Need Help Simplifying
I posted this on Stack but since it's working code, it was suggested I post it here. I wrote this code to calculate ice thickness using the following equation from Stephenson, 2011.
It's a daily ...
- 41
4
votes
1
answer
130
views
Finding the earliest time we can schedule
We have a list of \$j \in \{1,\ldots,N\}\$ jobs with a processing time \$p_j\$ and a demand \$d_j\$ between 0 and 1. These are real numbers. Jobs require the fixed demand over the entirety of their ...
- 43
2
votes
1
answer
389
views
Generating random number of randomly sized Squares/Rectangles using numpy arrays
I made classes to use in generating square/rectangular shapes on a texture.
...
- 21
2
votes
1
answer
257
views
Replace nested for loops when assigning intial conditions in a 4-dimensional array
I create a 4-dimensional (x, y, z, t) array of zero values. I then set the initial values at t = Tmax. To do this, I use a nested for loop. I attempted to improve ...
- 111
2
votes
1
answer
131
views
Minimum re-labeling to make an array as close as possible to another one
I have an array with integer labels in [0, n-1], say arr1=[1, 0, 3, 2] with n = 3. And then I have another array again with integer labels in [0, n-1], say arr2=[0, 0, 2, 3]. How can I find the ...
- 23
4
votes
1
answer
105
views
Dataframe transformation to numpy ndarray takes ages to complete
I would like to transform my dataframe into an array of fixed-sized chunks from each unique segment. Specifically, I would like to transform the ...
- 143
1
vote
1
answer
869
views
Fill missing dates into array of np.datetime
Here is the problem:
Given an array of a non-continuous sequence of dates. Make it a
continuous sequence of dates, by filling in the missing dates.
...
- 315
2
votes
2
answers
790
views
Finding distance between vectors of matrices
So here is the problem:
Given 2D numpy arrays 'a' and 'b' of sizes n×m and k×m
respectively and one natural number 'p'. You need to find the
distance(Euclidean) of the rows of the matrices 'a' and ...
- 315
6
votes
3
answers
4k
views
Marking duplicate entries in a numpy array as True
So the problem is
Find the duplicate entries (2nd occurrence onwards) in the given numpy
array and mark them as True. First time occurrences should be False.
And my solution is:
...
- 315
4
votes
2
answers
400
views
Creating nxm index list of array a
Here is the problem:
Given a numpy array 'a' that contains n elements, denote by b the set
of its unique values in ascending order, denote by m the size of
array b. You need to create a numpy array ...
- 315
3
votes
1
answer
73
views
Generating multiple new arrays using numpy
Say I have the following two different states:
state1 = [0, 1, 0, 1, 1]
state2 = [1, 1, 0, 0, 1]
And I want to generate n number of new states by only changing the ...
- 133
7
votes
2
answers
798
views
How to clean the indexes, and ideally not create an additional array
So I answered this question on SO and probably did someone's homework along the way.
In the original question the OP has the answer variable and wants it split to ...
- 193
1
vote
1
answer
2k
views
Count the number of neighbors
I have a numpy array called contour of \$N\$ coordinates (x,y) of dimension (N, 2).
For each ...
- 31
3
votes
2
answers
537
views
3
votes
1
answer
71
views
Numpy array slicing/reshape/concatination
I'm sure my question exists on the internet, i just don't know the right formulations.
I have a data-sample as input for a NN. This sample has the shape (1, 8, 28, 80).
Basically it is 80 timesteps ...
- 133