Plot in AppDesigner with durations

Hey;

I'm currently designing a App in AppDesigner. In this App you can Plot Data over Time. I tried to figure out how to plot durations in normal Matlab. Below is my Code. This code worked fine in normal Matlab for me. But I couldn't figure out how to convert this into App Designer. It gives me the error that xlim and xtick must be numeric values and no duration values. Is it possible to plot in AppDesigner via durations and how the Plot Setting need to be written?

clc;
%Read mat-file
files = dir('examplefolder/*.mat*');
m = matfile(string(files.folder)+'/'+string(files.name));
% Variables
t = m.Data_time_L1_rms;
P_L1 = m.Data_P_L1;
%Convert time variable into duration
sec = seconds(t);
mins = minutes(sec);
%Plot
p = plot(sec,P_L1);
%Settings
xlim([sec(1) sec(end)+0.05*sec(end)]);
xticks([0:seconds(30):minutes(mins(end))]);
xtickformat('m');

[Cris LaPierre]

Can you share your mat file? Use the paperclip icon to attach it to your post.

[Robin Herman]

I attached my current App to the post

[Cris LaPierre]

Thank you. Could you also attach a sample data set? One of your mat files.

[Robin Herman]

the problem is that the all data sets i have are to large to attach atleast 1GB or more a matfile

Answer 1

[Cris LaPierre]

There is no difference in app designer between plotting numbers and plotting durations. You just plot it. The one thing to make sure you do is specify the target axes for all your plotting and setting commands. Here's code from a simplified app where the plotting command is placed in the callback function of a pushbutton.

% Callbacks that handle component events
    methods (Access = private)

        % Button pushed function: PlotButton
        function PlotButtonPushed(app, event)
            % Variables
            t = 1:100;
            P_L1 = sin(0.15*t);
            
            %Convert time variable into duration
            sec = seconds(t);
            mins = minutes(sec);
            
            %Plot
            plot(app.UIAxes,sec,P_L1);
            %Settings
            xlim(app.UIAxes,[sec(1) sec(end)+0.05*sec(end)]);
            xticks(app.UIAxes,[0:seconds(30):minutes(mins(end))]);
            xtickformat(app.UIAxes,'m');
        end
    end

[Robin Herman]

Thanks for the help so far!

But I get this error when im using your exact code in my App.

Error using xlim (line 31)

Limits must be a 2-element vector of increasing numeric values.

[Cris LaPierre]

I can duplicate that error, but only if I don't specify app.UIAxes in the xlim command.

...
%Plot
plot(app.UIAxes,sec,P_L1);
%Settings
xlim([sec(1) sec(end)+0.05*sec(end)]);
xticks(app.UIAxes,[0:seconds(30):minutes(mins(end))]);
xtickformat(app.UIAxes,'m');

I modified the app you shared previously by adding a plot button in the top left, and the exact code I shared above in the button callback function. It appears to work.

I've attached you app with my update.

[Robin Herman]

I opened your modified app and and runned it. it worked for me, i open my app, with the exact same code, gives me this error attached in the picture. I dont get it...

[Cris LaPierre]

So the code is not exactly the same. My thought would be to check that Ieff_max_L123 and Ieff_min_L123 are scalars (1x1). My suspicion is that they are not.

EDIT: Ah, spotted something.

It looks like you forgot your closing parentheses. It likely should end "...3))]);"

[Robin Herman]

Checked it, these Values are both scalars, i have the feeling that there must be somewhere else an error in the code that causes this current error

Edit: Spotted that error aswell, fixed it but didnt changed anything

Afterwards I solved the initial Problem

I tried to plot before the if loop begins and than it accepted my coding

[Cris LaPierre]

You should have gotten a different error about unbalanced parentheses.

I agree - there appears to be something in your app. The code you are wanting to implement obviously works fine on its own. Any chance you can create a sample data set for testing?

[Cris LaPierre]

As an alternative, could you clear your Workspace, then load the *.mat file into MATLAB. In the Command Window, type whos and paste the result here.

[Robin Herman]

solved the problem ! I edited my answer

thanks anyways putting so much effort into my request!