How can I fix the 'saveas' code to save pdf-files containing simulink simulation results by using 'strcat'?

Hello people,

I am struggled with the following code:

function nightly_simulation_Callback(hObject, eventdata, handles)
open_system('SimulinkModel.slx');
sim('SimulinkModel.slx');
hFig = findall(0,'tag','SIMULINK_SIMSCOPE_FIGURE');
name = strcat('NCSSimResults','_',num2str(1));
saveas(hFig, name, 'pdf');

I don't understand why the 'saveas' function doesn't work although I gave proper file name, file type and the figure of graphical simulation results of a Simulink model. Do I need to change something in 'strcat' code or? Also I hope that someone helps me in this issue.

Resulted errors:

Error using checkArgsForHandleToPrint

Handle input must be scalar, vector, or cell array of vectors.

Error in checkArgsForHandleToPrint

Error in print>LocalCreatePrintJob (line 100)

handles = checkArgsForHandleToPrint(0, varargin{:});

Error in print (line 38)

[pj, inputargs] = LocalCreatePrintJob(varargin{:});

Error in saveas (line 181)

print( h, name, ['-d' dev{i}] )

Error in GUI>nightly_simulation_Callback (line 909)

saveas(hFig, name, 'pdf');

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in GUI (line 43)

gui_mainfcn(gui_State, varargin{:});

Error in

matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)GUI('nightly_simulation_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating DestroyedObject Callback.

Answer 1

[Steven Lord]

What is the size of hFig? Is it a "scalar, vector, or cell array of vectors"? You can check the first two with isscalar and isvector.

[OK]

isscalar = 0 (not scalar)

isvector = 1 (yes, vector)

Is it what you asked as size???

size(hFig)

ans =

1 1