How to use a user plotting function within an app

I want to use custom functions to generate plots from within a matlab app. I want to pass data from the app to the function, then I want the function to plot data onto the UIfigure. The problem is when testfunc runs, it plots data in a new figure. I need to use a custom plotting function due to the complexity of the code I plan to use, so I prefer to keep that outside of the app.

Here's an example of what I have tried:

classdef Comp_Mapp < matlab.apps.AppBase

% Properties that correspond to app components

properties (Access = public)

UIFigure matlab.ui.Figure

UIAxes2 matlab.ui.control.UIAxes

UIAxes matlab.ui.control.UIAxes

end

% Callbacks that handle component events

methods (Access = private)

% Code that executes after component creation

function startupFcn(app)

x = [0:10:1000];

y1 = x*1;

y2 = x*2;

plot(app.UIAxes,x,y1)

hold on

plot(app.UIAxes,x,y2)

hold off

axes(app.UIAxes2);

testfunc(x,y1)

end

end

% Component initialization

methods (Access = private)

% Create UIFigure and components

function createComponents(app)

% Create UIFigure and hide until all components are created

app.UIFigure = uifigure('Visible', 'off');

app.UIFigure.Position = [100 100 1011 636];

app.UIFigure.Name = 'MATLAB App';

% Create UIAxes

app.UIAxes = uiaxes(app.UIFigure);

title(app.UIAxes, 'Title')

xlabel(app.UIAxes, 'Time')

ylabel(app.UIAxes, 'Speed/Torque')

zlabel(app.UIAxes, 'Z')

app.UIAxes.Position = [1 377 450 260];

% Create UIAxes2

app.UIAxes2 = uiaxes(app.UIFigure);

title(app.UIAxes2, 'Title')

xlabel(app.UIAxes2, 'X')

ylabel(app.UIAxes2, 'Y')

zlabel(app.UIAxes2, 'Z')

app.UIAxes2.Position = [441 7 570 630];

% Show the figure after all components are created

app.UIFigure.Visible = 'on';

end

end

% App creation and deletion

methods (Access = public)

% Construct app

function app = Comp_Map1

% Create UIFigure and components

createComponents(app)

% Register the app with App Designer

registerApp(app, app.UIFigure)

% Execute the startup function

runStartupFcn(app, @startupFcn)

if nargout == 0

clear app

end

end

% Code that executes before app deletion

function delete(app)

% Delete UIFigure when app is deleted

delete(app.UIFigure)

end

end

end

testfunc:

function [] = testfunc(x,y)

%UNTITLED Summary of this function goes here

% Detailed explanation goes here

plot(x,y)

end

Answer 1

[Adam Danz]

Specify the axes handle,

testfunc(app.UIAxes,x,y1)

function [] = testfunc(ax,x,y)
%UNTITLED Summary of this function goes here
%   Detailed explanation goes here
plot(ax,x,y)
end

If you cannot modify the function and it does not have an input argument that accepts an axes handle or app handle, then you'll have to turn the handle visibility of the app on and make the axes current.

I've explained those steps here

https://www.mathworks.com/matlabcentral/answers/705623-using-dendrogram-in-app-designer#answer_587838

[ED]

While this would be the easiest thing to do in this example, the function that I intend to use for plotting does not have an axes handle as an input. "testfunc" was a dummy function, the plotting funciton I intend to use is more complex. It actually makes a series of plots, text, labels, etc's and I would like to be able to use it without specifing an axes handle if possible.

If there's a clean way to make axes handle as a varargin to my plotting function without updating 50 lines of code I suppose that would be an option too.

[Adam Danz]

answer updated

[ED]

Exactly what I needed, thanks!