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Object oriented programming problem?

Latest activity Edited by per isakson
on 19 Feb 2019
I writing a program using object oriented programming in matlab 2016b. The program gives the following error:
Error using MyPr1.internalcode.Neural.FourDimensionData
The specified superclass 'MyPr2.ap.datashare' contains a parse error, cannot be found on MATLAB's search path,
or is shadowed by another file with the same name.
The FourDimensionData and datashare are in different folders. All are private.
The error code segment is:
classdef FourDimensionData < ...
MyPr2.ap.datashare &...
MyPr2.ap.datashare.Reconstruct &...
MyPr2.ap.datashare.restore &...
How can I solve this error?

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2 Answers

Answer by Andrey Kiselnikov on 7 Feb 2019
Edited by per isakson
on 18 Feb 2019

Hi, you can check this manual https://www.ee.columbia.edu/~marios/matlab/MatlabStyle1p5.pdf . It was very useful for me, when I started oop in MATLAB. Also you should check ALL file paths in your application. I prefer to write some function like attached, that configures all file paths before execution.
function config_paths
rootDir = fileparts(which('config_paths'));
path2add{1} = rootDir;
path2add{2} = [rootDir,'folder_1'];
path2add{3} = [rootDir,'folder_2'];
% etc
end

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Answer by per isakson
on 15 Feb 2019

MyPr2.ap.datashare, is that a folder, ...\+MyPr2\+ap\+datashare, or a classdef-file, ...\+MyPr2\+ap\datashare.m ?
Your code snippet indicates that in the folder, ...\+MyPr2\+ap\, you have a folder named, +datashare, together with a file named, datashare.m. Is that the case?

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Thank you very much for your comment. \+MyPr2\+ap\+datashare are folders but Reconstruct and restore are file, that means Reconstruct.m and restore.m
SuperclassName must be the name of a class. IMO: That could have been more clearly stated the documentation.
classdef FourDimensionData < ...
MyPr2.ap.datashare &... % You cannot inherit from a folder
MyPr2.ap.datashare.Reconstruct &...
MyPr2.ap.datashare.restore &...

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