scipy-lecture-notes | Tutorial material on the scientific Python ecosystem | Learning library
kandi X-RAY | scipy-lecture-notes Summary
kandi X-RAY | scipy-lecture-notes Summary
Tutorial material on the scientific Python ecosystem
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Top functions reviewed by kandi - BETA
- Implementation of IECA
- Calculate the derivative of the gaussian correlation
- Compute the function f
- Compare two optimizers
- Benchmark an optimizer
- Apply a function to func
- Bencher - Hessian Hessian
- Generate the cost function for a given distribution
- Compute the covariance matrix
- Compute the symmetric symmetry operator
- Plot a supervised plot
- Creates the base plot
- Load data from file
- Compute the log - likelihood function
- Fortran_module
- Calculate the cost function for a given method
- Return a configuration object
- Random model
- Find a module in sys path
- Plot tick line
- Returns a list of filenames sorted by their length
- Create a dictionary of the cost function
- Performs an iteration on an iterated image
- Generate a nonlinear model
- Generate the sakara matrix
- Compute mandelbrot
- Sort a list
- Draw a box
scipy-lecture-notes Key Features
scipy-lecture-notes Examples and Code Snippets
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Community Discussions
Trending Discussions on scipy-lecture-notes
QUESTION
I have been struggling for a few day to understand the access to numpy arrays in C extension, but I've trouble understanding the documentation.
Edit: Here is the code I would like to port to c (the grav function)
...ANSWER
Answered 2019-May-18 at 10:58Probably the best way to figure it out is to create the iterator in Python and experiment with it there. This will be slow, but it'll confirm what you're doing is right. You then use NpyIter_AdvancedNew
, using the default parameters wherever possible.
I'm afraid I haven't actually translated this into C code myself - it was taking too long for me. I therefore suggest you don't accept this answer since it only gives a starting point really.
My guess would be that any performance improvements will be disappointing given the amount of effort that writing C code is (especially since I'd guess that writing fast code needs a deeper level of understanding). At the end of the answer I suggest a few of simpler alternatives that I'd recommend instead of using the C API.
ExamplesI've translated a couple of lines from your code as examples:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install scipy-lecture-notes
You can use scipy-lecture-notes like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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