How do I compute derivative using Numpy?
How do I calculate the derivative of a function, for example
numpy
Efficient Numpy 2D array construction from 1D array
I have an array like this:
Conditionally fill column values based on another columns value in pandas
I have a DataFrame with a few columns. One columns contains a symbol for which currency is being used, for instance a euro or a dollar sign. Another column contains a budget value. So for instance in one row it could mean a budget of 5000 in euro and in the next row it could say a budget of 2000 in dollar.
python numpy/scipy curve fitting
I have some points and I am trying to fit curve for this points. I know that there exist scipy.optimize.curve_fit function, but I do not understand documentation, i.e how to use this function.
Adding a background image to a plot
Say I am plotting a set of points with an image as a background. I’ve used the Lena image in the example:
Multiple linear regression in Python
I can’t seem to find any python libraries that do multiple regression. The only things I find only do simple regression. I need to regress my dependent variable (y) against several independent variables (x1, x2, x3, etc.).
How to understand numpy strides for layman?
I am currently going through numpy and there is a topic in numpy called “strides”. I understand what it is. But how does it work? I did not find any useful information online. Can anyone let me understand in a layman’s terms?
How to normalize a NumPy array to a unit vector?
I would like to convert a NumPy array to a unit vector. More specifically, I am looking for an equivalent version of this normalisation function:
Force NumPy ndarray to take ownership of its memory in Cython
Following this answer to “Can I force a numpy ndarray to take ownership of its memory?” I attempted to use the Python C API function PyArray_ENABLEFLAGS through Cython’s NumPy wrapper and found it is not exposed.
Fastest way to grow a numpy numeric array
Requirements: