Export data from python to matlab
G= Show Python ndarray with properties: T: [1×1 py.numpy.ndarray] base: [1×1 py.NoneType] ctypes: [1×1 py.numpy.core._internal._ctypes] data: [1×3 py.memoryview] dtype: [1×1 py.numpy.dtype] flags: [1×1 py.numpy.flagsobj] flat: [1×1 py.numpy.flatiter] imag: [1×1 py.numpy.ndarray] itemsize: [1×1 py.int] nbytes: [1×1 py.int] ndim: [1×1 py.int] real: [1×1 py.numpy.ndarray] shape: [1×2 py.tuple] size: [1×1 py.int] strides: [1×2 py.tuple] [[1.00000001 1.00000001 3.00000001] [1.00000001 1.00000001 3.00000001] [1.00000001 1.00000001 3.00000001]]
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I have a logical and a uint16 array, both of the size 5000x2000. How can i get these two into python? E.g. into a numpy array? Answers (1)
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version 1.0.1.0 (9.71 KB) by Convert Python data structures to MATLAB data structures and vice versa.
With a Python distribution and MATLAB installed on the same machine, MATLAB can create Python data structures from within; e.g. myPyStr = py.str('Hello World!'). Python data structures can also be created within MATLAB by the output of a Python package. Python data can be converted back into a MATLAB data type through type-conversion, e.g. char(myPyStr). This function automates the identification of the Python data type and convert it to the appropriate MATLAB data type and vice versa. Cite AsKyle (2022). Core_py2matlab: convert data from Python to MATLAB and back. (https://www.mathworks.com/matlabcentral/fileexchange/53717-core_py2matlab-convert-data-from-python-to-matlab-and-back), MATLAB Central File Exchange. Retrieved September 17, 2022. I'm working with Python and MATLAB right now and I have a 2D array in Python that I need to write to a file and then be able to read it into MATLAB as a matrix. Any ideas on how to do this? Thanks!
Amro 123k25 gold badges237 silver badges443 bronze badges asked Jul 7, 2009 at 22:55 0 If you use numpy/scipy, you can use the
Now, you can load this data into MATLAB using File -> Load
Data. Select the file and the Note: I did this on scipy 0.7.0. (scipy 0.6 has EDIT: updated link thanks to @gnovice.
Pani 1,2791 gold badge13 silver badges20 bronze badges answered Jul 7, 2009 at 23:13
arsars 116k22 gold badges142 silver badges134 bronze badges 2 I think ars has the most straight-forward answer for saving the data to a .mat file from Python (using savemat). To add just a little to their answer, you can also load the .mat file into MATLAB programmatically using the LOAD function instead of doing it by hand using the MATLAB command window menu... You can use either the command syntax form of LOAD:
or the function syntax form (if you have the file path stored in a string):
answered Jul 8, 2009 at 0:13
gnovicegnovice 125k14 gold badges255 silver badges355 bronze badges 1
I wrote a small function to do this same thing, without need for numpy. It takes a list of lists and returns a string with a MATLAB-formatted matrix.
Write answered Jul 7, 2009 at 23:45
Seth JohnsonSeth Johnson 14.1k6 gold badges57 silver badges85 bronze badges I would probably use
Jack 10.9k13 gold badges49 silver badges65 bronze badges answered Oct 12, 2011 at 9:03
1 You could write the matrix in Python to a CSV file and read it in MATLAB using csvread. answered Jul 7, 2009 at 23:03
JacobJacob 33.8k14 gold badges109 silver badges164 bronze badges 1 You can also call matlab directly from python:
answered Jul 30, 2011 at 18:26
SiggyFSiggyF 20.8k8 gold badges39 silver badges56 bronze badges The toolbox npy-matlab can read
npy-matlab is a simple collection of M-files available from GitHub, with a 2-clause BSD licence.
Cris Luengo 51.1k7 gold badges59 silver badges113 bronze badges answered Nov 26, 2016 at 3:36
How do I transfer data from Python to MATLAB?Python data can be converted back into a MATLAB data type through type-conversion, e.g. char(myPyStr). This function automates the identification of the Python data type and convert it to the appropriate MATLAB data type and vice versa.
Can Python interact with MATLAB?MATLAB® provides a flexible, two-way integration with many programming languages, including Python. This allows different teams to work together and use MATLAB algorithms within production software and IT systems.
Can you call Python from MATLAB?To call a Python method or function, type py. followed by the module name, function name, and arguments. In most cases, MATLAB automatically converts input arguments into Python types. An exception is calling a Python function with keyword arguments.
How does MATLAB recognize Python?To verify that Python is installed on your system, open the Python interpreter from your system prompt and call Python functions. By default, MATLAB selects the version of Python based on your system path. To view the system path in MATLAB, use the getenv('path') command.
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