Finding indices of matches of one array in another array
I have two numpy arrays, A and B. A conatains unique values and B is a sub-array of A.
Now I am looking for a way to get the index of B’s values within A.
numpy
How to take column-slices of dataframe in pandas
I load some machine learning data from a CSV file. The first 2 columns are observations and the remaining columns are features.
Get intersecting rows across two 2D numpy arrays
I want to get the intersecting (common) rows across two 2D numpy arrays. E.g., if the following arrays are passed as inputs:
Converting numpy dtypes to native python types
If I have a numpy dtype, how do I automatically convert it to its closest python data type? For example,
Understanding tensordot
After I learned how to use einsum, I am now trying to understand how np.tensordot works.
replace() method not working on Pandas DataFrame
I have looked up this issue and most questions are for more complex replacements. However in my case I have a very simple dataframe as a test dummy.
Plotting a 2D heatmap with Matplotlib
Using Matplotlib, I want to plot a 2D heat map. My data is an n-by-n Numpy array, each with a value between 0 and 1. So for the (i, j) element of this array, I want to plot a square at the (i, j) coordinate in my heat map, whose color is proportional to the element’s value in the array.
pandas select from Dataframe using startswith
This works (using Pandas 12 dev)
Automatically import modules when entering the python or ipython interpreter
I find myself typing import numpy as np almost every single time I fire up the python interpreter. How do I set up the python or ipython interpreter so that numpy is automatically imported?
Python/NumPy first occurrence of subarray
In Python or NumPy, what is the best way to find out the first occurrence of a subarray?