# arrays

## Using an array without the last element is simple in Python, `array[:-1]`. How would index splicing of this sort work in C?

Using an array without the last element is simple in Python, `array[:-1]`. How would index splicing of this sort work in C? Question: In Python, if I have a list A, if I wanted to use that list without including the last element in the list, I could just use array[:-1]. How would I get …

## How to add a dimension to an array and fill up the new dimension with a set of same data

How to add a dimension to an array and fill up the new dimension with a set of same data Question: I have two 1D-arrays. I need to expand the first array (a) with all lines from the second array (b) to create a new array that is a 1D-array merging the two arrays. Example …

## How to compute one mean dataset of 4 datasets [Python, xarray]

How to compute one mean dataset of 4 datasets [Python, xarray] Question: I’m having 4 [GFS] temperature datasets: they are all the same in spatial resolution, the only difference is timestamp – they are for 00 UTC, 06 UTC, 12 UTC, 18 UTC within one day. I need to compute the mean daily temperature dataset. …

## Python find all non-repeat combinations and get both the values they have in common and their unique values

Python find all non-repeat combinations and get both the values they have in common and their unique values Question: I have an array of sets [setA, setB, setC, setD, …, setX] and I want to find a way to get the intersection of each combination (without repeat combos), so: AB = setA.intersect(setB) AC = setA.intersect(setC) …

## non-iteratively turning a 2d numpy array into a 1d array, via an AND operation

non-iteratively turning a 2d numpy array into a 1d array, via an AND operation Question: i have a 2d numpy array of boolean values of shape(1E5, 2), with it acting like an array of x,y values. ie, 1E5 items each with 2 boolean values, being stored in that initial 2d array example: [ [True, False], …

## how to get a value from a string line of a file

how to get a value from a string line of a file Question: I have a log file which contains multiple lines and I want to get the value of the string WorkerThreads="20" from specific line of the below log content 10000 2aa0 03/29 17:02:30 ### Context="cvd.exe" Module="ThreadPool" Instance="cvstatanalysis" Type="Delta" TaskAdded="0" TaskDone="0" 10000 2aa0 03/29 …

## How to run a Fortran script with ctypes?

How to run a Fortran script with ctypes? Question: First of all I have no experience coding with fortran. I am trying to run a fortran code with python ctypes. I used the command gfortran -shared -g -o test.so test.f90 to convert my test.f90 file (code below) to test.so. After reading C function called from …

## Convert numpy 1D array to an adjacency matrix

Convert numpy 1D array to an adjacency matrix Question: How can I convert a numpy 1D array: np.array([1,2,3,4,5,6,7,8,9,10]) to an adjacency like matrix, i.e with zeroes in the diagonal? Desired output: [[0 0 0 0 0] [1 0 0 0 0] [2 5 0 0 0] [3 6 8 0 0] [4 7 9 10 …