whats wrong with this app?

Hi! :)

I am attaching a small app, visualiseringsapp.

What is wrong with my switch value changed callback function?

I don’t get any plot and don’t get any error either

App3 is a big app so I am not attaching it here.

Visualiseringsapp is calling app3 as you can see.

Answer 1

[Alberto Cuadra Lara]

Hi Muazma,

I guess the property Osmotisk_data is obtained from app3, right? In that case, you should refer to

X = app.Callingapp.Osmotisk_data.samlet_vannaktivitet;
Y = app.Callingapp.Osmotisk_data.Osmotic_pressure;

and not directly from app.Osmotisk_data, because that property is not defined in visualiseringsapp.

Additionaly, I do not understand your objective with the else statement

else
    plot(app.UIAxes, '','')
end

[Muazma Ali]

@Alberto Cuadra Lara I want the plot to be blank if the user hasnt pushed on , on the swith . Cant I do it this way then..?

[Alberto Cuadra Lara]

No, what you want can be done using Matlab's built-in function cla, which can be used as follows:

cla(app.UIAxes);

[Muazma Ali]

@Alberto Cuadra Lara I tried what you suggested but here is the error:

Error using app3/startupFcn (line 60)

Not enough input arguments.

Error in app3 (line 1993)

runStartupFcn(app, @(app)startupFcn(app, varargin{:}))

Error in visualiseringsapp/startupFcn (line 23)

app.Callingapp=app3;

Error in visualiseringsapp (line 84)

runStartupFcn(app, @startupFcn)

Error in app3/PlotresultsButtonPushed (line 1862)

visualiseringsapp

Error using matlab.ui.control.internal.controller.ComponentController/executeUserCallback (line 335)

Error while evaluating Button PrivateButtonPushedFcn.

Dot indexing is not supported for variables of this type.

Error in visualiseringsapp/SwitchValueChanged (line 34)

X=app.Callingapp.Osmotisk_data.samlet_vannaktivitet;

Error using matlab.ui.control.internal.controller.ComponentController/executeUserCallback (line 378)

Error while evaluating RockerSwitch PrivateValueChangedFcn.

>>

[Alberto Cuadra Lara]

I see.

• Include app3 as an input parameter (see figure attached).
• visualiseringsapp has to be called from app3.

[Muazma Ali]

@Alberto Cuadra Lara Hi again! :)

I have matlab 2018 so I dont understand how I can make app3 as an input to visualiseringsapp. I dont have the same options as you have on the right side; dont have sharing details...

Can you help me with this issue?

In addition I dont know wheter 'cla' will be acceptable in matlab 2018

Thanks

[Muazma Ali]

@Alberto Cuadra Lara I have managed to find out the solution to my problem, :)

But I have one question to you: When we use app3 as an input parameter, are we saying that all the variables from app3 can be accessed by visualiseringsapp..?

thanks

[Alberto Cuadra Lara]

Great! No, you can only access the public properties of app3 object.

Also, the cla function was included in Matlab R2006a, so you should be able to use it.

Best,

Alberto

[Muazma Ali]

@Alberto Cuadra Lara Hi

But if I have a table osmotic data and I have just declared this table public in app3 and the fields of this table as private properties, will I not be able to plot data based on the fields of osmotic data as visualiseringsapp is supposed to do..?