Passing a string variable to matlab script from Python using the matlab Python API

5 次查看（过去 30 天）
ApprenticeMatlab
ApprenticeMatlab 2018-3-8
回答： David Hocker 2020-9-11
Hi, This might be something really simple to someone who have done this, but i am struggling passing a string variable to matlab script from Python using the matlab Python API. I am doing this in 2017b
Here is what i have: 1. Matlab function: config = parseInputs(filename) %filename is a char array in matlab like "config.csv"
2. Python script file which attempts to call the above matlab function. I have saved my function parseInputs.m in the same directory as the python script.
Below is my python script:
import matlab.engine
eng = matlab.engine.start_matlab()
filename = "config.csv"
parameterMy = eng.parseInputs(filename, nargout=2)
I am getting an error like below:
File "C:\ProgramData\Anaconda3\lib\site-packages\matlab\engine\fevalfuture.py", line 82, in result
self._result = pythonengine.getFEvalResult(self._future,self._nargout, None, out=self._out, err=self._err)
MatlabExecutionError: Undefined function 'parseInputs' for input arguments of type 'char'.
Any hint on how to make it work? Thanks!
  1 个评论
per isakson
per isakson 2019-6-12
编辑：per isakson 2019-6-12
"a char array in matlab like "config.csv" " . Double or single quotes makes a difference
  • "config.csv" is a scalar string
  • 'config.csv' is a character array
However, that might not be relevant to the error you encounter.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Eduardo Villalobos
Eduardo Villalobos 2019-6-12
Hey,
did you manage to solve this?
Thanks!
David Hocker
David Hocker 2020-9-11
I had a similar issue, and found that I didn't have the specific matlab function in my current working directory for my python code. Once I moved it there, I was able to get the command to execute. I also used python strings (double quotes, not single) for my string inputs.

类别

在 Help Center 和 File Exchange 中查找有关 Call MATLAB from Python 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by