Category "numpy"

Splitting Array of Lists into named subarrays

Splitting Arrays for Test Train Essentially I am attempting to convert a pandas dataframe into numpy arrays so that I can run it through a Test/Train. My goal h

Numpy sum of 2D array along axis=1, floating range

I would like to perform a sum of a 2D array over the second axis, but on a range which is variable. Not vectorised it is:` import numpy as np nx = 3 ny = 5 a =

Python find indices of subarrays which are continuous and increasing with difference of 1

The input is always strictly increasing. I could write this with a for loop and lots of if-else conditions, but is there some simple way? Here is an example: in

Attempting to use np.insert in a created class which has subscripts yields "object does not support item assignment" debug

I have defined my own class which takes in any matrix and is defined in such a way to convert this matrix into three numpy arrays inside a parenthesis (which I

Formating a frequency dataframe to a table and a histogram

If I have a frequency table like below: ret < -1(%) -1 < ret < -0.5(%) -0.5 < ret < 0(%) 0 < ret < 0.5(%) 0.5 < ret <

Using cblas_dgemm in C and returning the product matrix in python

I am fairly new to parallel computing and we have been assigned to implement a matrix algorithm in C for later use in python. The problem comes when my function

Images Have Grey Values of True and False

I'm planning to process some images using PyCharm. However, I find a bug and start to find the reason. Finally, I find that the images have grey values of True

Adding new column with first non Nan for each row closest to a chosen column from a dataset Python

Hello I want to create a new column from a given dataset (that I call here "df") with the first non-Nan for each row and closest from a given column For example

Create TensorFlow tensor from two smaller tensors using boolean mask

I'm using TensorFlow and would like to create a 1D tensor t1 from two smaller tensors t2 and t3, where len(t2) + len(t3) == len(t1) and a boolean mask which ind

How to combine two columns in pandas dataframe and set values to them?

I have two columns in pandas dataframe Latitude and Longitude. I am trying two combine them in single column LOCATION. If we see the data there are only two loc

How to read a C struct (or Numpy record array) into a Polars Dataframe?

I have a binary file containing records from a C struct. I would like to read that file into a Polars Dataframe. I can accomplish that as below, but I'm wonderi

Problem by using for loop when loading data series from .csv file and save them as array matrix for every columns loaded

I want to load a series of data from 6 CSV files and save them per column of the data series. As I call the Column_A, Column_B and new_Column_A, only the last o

Python: extracting specific values out an numpy array of indices

I have a numpy array of indices. For example: indices = np.array([0, 1, 2, 6, 7, 9, 12, 13, 14]) I would like to make an array signals = np.zeros(np.amax(indi

How to solve Numpy installing error in windows 10, (Python 64 bit)?

I was installing numpy in python latest version 3.10.4 (64bit) after installation of python I did this below in cmd window. C:\Users\Administrator>mkdir pyve

Python | Give list [1,2,3,4] -> return 1*2+2*3+3*4

So as i said in the title, i want to multipy each two neigbors in the list and sum them all - with a single code line. I'm looking for the most elegant and effi

How to make fixed ticks for graph using matplotlib [duplicate]

I am trying to make a graph with fixed ticks, regardless to the points values. For example, I want the ticks to be 0-6, and the points values

Comparing lists within dataframe column to another list using numpy's where function

This is my first post at Stackoverflow, so thank you for the help. I am trying to replicate a code where I can match a list within a dataframe to another list,

How to customize general error messages of numpy?

I am writing a Vector and Matrix classes that use numpy in the backend in order to abstract some common methods and calculations (specifically, physics calculat

Conversion between binary vector and 128 bit number

Is there a way to convert back and forth between a binary vector and a 128-bit number? I have the following binary vector: import numpy as np bits = np.array([

Generate binary outcome dummy data based on probability of items and its feature

I want to generate a synthetic data from scratch which is a binary outcome sequence data (0/1). My data has following property- For the sake of an example, lets