New install: Undefined function 'isstring' for input arguments of type 'char'.

Question

Kelsey Dutta 2020-7-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/570175-new-install-undefined-function-isstring-for-input-arguments-of-type-char

回答： Steven Lord 2020-7-24

采纳的回答： Steven Lord

I just installed Matlab 2015 and get the following error upon starting the program:

> In matlabrc (line 228)

Undefined function 'isstring' for input arguments of type 'char'.

Error in fileparts (line 41)

if isstring(file)

The same "Undefined function 'isstring'..." appears in a dialog box whenever I try to open any script or function. However I know that I have isstring...

>> which isstring

C:\Program Files\MATLAB\R2015a\toolbox\matlab\codetools\@mtree\isstring.m % mtree method

I have 2019a installed on my machine and it works perfectly fine.

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Answer 1

Steven Lord 2020-7-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/570175-new-install-undefined-function-isstring-for-input-arguments-of-type-char#answer_470584

在 MATLAB Online 中打开

I think you have a fileparts.m that you downloaded or wrote on your path ahead of the one included in MATLAB. When I opened release R2015a line 41 was:

ind = find(file == '/'|file == '\', 1, 'last');

Check which fileparts function you're running:

which -all fileparts