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To install it, have a look at the installation instructions. In general, call pip install matplotlib or use your preferred mechanism (conda, homebrew, windows installer, system package manager, etc). In some cases you may need to install additional non-python dependencies (libpng and freetype) through your system's package manager.
This means that it can be installed on a 32-bit version of python. Additionally, the libraries I listed aren't very robust in terms of 32-bit versions of python, so I needed to find versions of the above libraries that are all compatible with the same version of 32-bit Python. This is what I got to work. Python: 3.9.13 (32-bit) numpy: 1.23.5
Installation instructions will differ a bit between platforms; your best bet is probably to consult your local Python documentation. Commonly, pip3 install matplotlib or (if you are sure pip is the Python 3 version) pip install matplotlib; but if you are using a manager like Anaconda etc the arrangements will be slightly different.
Matplotlib already works pretty fine with Python 3.11. No need to go down to 3.9. Really, it's just a few days old. Give it some time. Keep your python 3.11 environment and use it for whatever you want to use matplotlib. Keep a Python 3.12 environment for your very first steps in Python 3.12, and try to install matplotlib now and then.
Right click on the Python installation and choose " Manage Python Packages... Type " matplotlib " in the search field. Click on " Run command: pip install matplotlib ". Now Matplotlib should be installed on the Visual Studio Python environment! Note that if the chosen Python environment is: "Python 3.XX (global default)"
Im having a lot of difficulty installing matplotlib for python 3.10.0 on my new windows 11 machine. I will explain from the top down In my VScode jupyter file I try to run the folowing code cell im...
use pip3 install matplotlib to install matlplot lib. By default, pip will install those package for 2.7 as it the native one. using pip3 makes it specific for python 3, and make sure you have only one version of python 3
Use the command line, not the Python shell (DOS, PowerShell in Windows). C:\Program Files\Python2.7\Scripts> pip install XYZ. If you installed Python into your PATH using the latest installers, you don't need to be in that folder to run pip. Terminal in Mac or Linux. $ pip install XYZ.
edit: matplotlib has now released wheels for python 3.9 so pip install --upgrade matplotlib should work. original answer matplotlib hasn't made a wheel yet for version 3.9 so your python attempted to build it from source.
Probably the easiest thing to do is reinstall Python from python.org, either 32- or 64-bit, make sure that runs smoothly, and then try to reinstall NumPy, matplotlib, and matplotlib's dependencies (dateutil, pytz, pyparsing, six, pillow, and a backend like pyqt4 or pycairo if you don't want to use the default Tk backend), all from Gohlke's site.