Category "numpy"

Numpy where function in python

I have a data frame like this: pd.DataFrame({'Material': ['Steel (16MnCr5)', 'X', 'X', 'X', 'Carbon black', 'Sulfur', 'Copper'], 'Weight': [4, 8, 0, 8, 6, 9, 3

how to do count of particular value of given column corresponding to other column

To count the particular value of given column

How to set space between the axis and the label in matplotlib

My code: #importing required libraries import numpy as np from matplotlib.patches import Polygon import matplotlib.pyplot as plt #plotting data def func(x):

Python numpy np.argmax() using user specific range/axis

I have an array named fft with the length of length (800) and want to get the np.argmax(fft) and get as expected the maximum at position result (420). The data

extract intensity profile along a line from image

ch4-out is the sample imageI have a numpy array that contains some image data (ch4_out). Now, I want to extract intensity profile along a particular line (horiz

How to vectorize such an algorithm in python?

I have four (nx1) dimensional arrays named a, b, c, and F. I want to run this algorithm without any loops. for i in range(n): if a[i] < b[i]: F[i

how to find possible combinations

I have an array of 16 columns and 22 rows. please advice how to find all possible combinations with the following rules: I can't choose more than 1 value per ro

IndexError: invalid index to scalar variable while testing

This is the code used in testing. I have been getting the error shown bellow. Can someone please tell me how to solve it? This is a custom trained model. I have

How to create a 2D numpy array from a block of strings

With list comprehension, I am able to take a 20x20 block of numbers in string format, and convert it to a list of lists of integers. The numbers are seperated b

ValueError: numpy.ndarray size changed, may indicate binary incompatibility. Expected 88 from C header, got 80 from PyObject

Importing from pyxdameraulevenshtein gives the following error, I have pyxdameraulevenshtein==1.5.3, pandas==1.1.4 and scikit-learn==0.20.2. Numpy is 1.16.1.

Output doesn't come. Plotting issue [Matlab to python conversion]

This is my Pyhton code. import numpy as np import matplotlib.pyplot as plt n = 3; #% No of image T = 100;

Performance issues when iterating numpy array

I have a 3D array of image such as [ [ [225, 0, 0], [225, 225, 0], ... ], [ [225, 0, 0], [225, 225, 0],

Change of behavior of a function to compute multiple numpy arrays mean

I have three BGR color values (stored into numpy arrays) and I want to compute their mean value (of each element, as to have a numpy array looking like this : [

pipenv locking for NumPy fails on Python3.9 and pip21.0.1

When I try to install pandas via pipenv I get a bunch of numpy errors after the locking process. When I try to install bs4 via pipenv it works fine, but for som

How to fix the NumPy .dtype 'NoneType' error

I am running the following Python code in PyCharm debug mode. import numpy as np, pandas as pd, numpy.polynomial.chebyshev as chebyshev from pathlib import Path

Problem to integrate a function with multiple array in python

I work on a Python Script and I need to integrate a very long function. The function contains several array and I don't succeed to integrate it. I need to integ

How to perform binomial-coefficient and factorial calculation with more precision?

I was comparing the result of my following python calculation with Mathematica: https://www.wolframalpha.com/input?i=sum+%28500+choose+r+%29%28-1%29%5Er+%2F%28r

iterating different length arrays and replace values

I have a dataframe that looks like this: df = pd.DataFrame({'col1': [[[1,5,3],[0,0,0]], [[1,2,3],[0,0,0], [1,2,3]]]}) # which looks like this: col1 0 [[1

Solve linear Inequalities

I want to solve a system of inequalities A x <= b, namely to visualize the set of solutions of this system. Are there any ways to do this in Python? The solu

why the first example in xtensor can't run?

I install the xtensor by conda conda install -c conda-forge xtensor and I find the position where the xtensor is installed, path_xtensor="/amax/home/user/minic