Matlab in Qt

[Moeka_Chan]

Hello,

I am going to use Matlab function in Qt.
I search for a long time and don't get anything...
I am trying Matlab engine API in C++, but Qt cannot find engine.h.
In the current documentation of Matlab, it seems to use other headers.
Most posts about this topic are old.

[Pablo J. Rogina]

@Moeka_Chan could it be possible you post what you have done so far?
i.e. your .pro file, some code snippets, compiler/runtime errors

[Moeka_Chan]

@Pablo-J-Rogina
I modified my project file according to this post. https://forum.qt.io/topic/85112/configure-matlab-engine-in-qtcreator/14
I created a default UI project, only modified the .pro file and add the "engine.h" header.
The Manage Kits is shown in the figure.

The .pro file is shown below.

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = QtUIMatlabTest
TEMPLATE = app

DEFINES += QT_DEPRECATED_WARNINGS


CONFIG += c++11
CONFIG += create_prl
CONFIG += link_prl

SOURCES += \
        main.cpp \
        mainwindow.cpp



FORMS += \
        mainwindow.ui

HEADERS  += mainwindow.h \
            engine.h



LIBS += -L"C:/Program Files/MATLAB/R2017b/extern/lib/win64/microsoft/" -llibeng \
        -L"C:/Program Files/MATLAB/R2017b/extern/lib/win64/microsoft/" -llibmx

INCLUDEPATH += "C:/Program Files/MATLAB/R2017b/extern/include"

qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

I got an error.

error: C1083: Cannot open include file: 'engine.h': No such file or directory

I tried other headers and modified the .pro file, following the link: https://www.mathworks.com/help/matlab/matlab_external/build-c-engine-programs.html.
I got error: C1083 again.

[SGaist]

Hi,

Do you mean the "engine.h" that you have added to your HEADERS variable ?

[Moeka_Chan]

@SGaist
Yes. I also tried MatlabEngine.hpp after changing the library. It said that Cannot open include file 'MatlabEngine.hpp'.

Since I failed to make it in Qt, I tried to use Matlab in C++ in Visual Studio (not Qt Creator). The debug failed because libMatlabEngine.dll was not found.

[SGaist]

Are you sure of the paths of the files you are using ?

[Moeka_Chan]

@SGaist
LIBS and INCLUDEPATH should be correct in Qt.
However, for the Visual Studio case, they may be correct. I change the directories in properties.....

[SGaist]

What do you change exactly ?

[Moeka_Chan]

@SGaist
I somehow solved the problem....
I run qmake.
Then, it manages to open the include file and run the codes, but it shows many warnings....
I don't know I must run qmake before run the codes...