Plot using the App Designer

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Fuwad Abdul Muyeed
Fuwad Abdul Muyeed 2021 年 10 月 4 日
I have a certain data of approximately 100 data points stored in a variable in 2 columns. Suppose data=[x,y] (2 columns,100 rows).
Under the App Designer, I want to extract first 20 data points and plot them. Upon checking the plot, I want to select the Next button and view the plot for the next 20 data points. I have set up the layout in the App Designer but I would like to know how and where to add the code such that it will extract the points from existing variable 'data' and plot them. I am using the 3 panel layout.


Shravan Kumar Vankaramoni
Shravan Kumar Vankaramoni 2021 年 10 月 7 日
You need to maintain a local variable to keep a count on the number of points already read. Below code demonstrates plotting the graph with next 20 points on clicking next button. "app.Data" is your data and "app.Count" counts the number of points read. Below function is the callback for next button.
function NextButtonPushed(app, event)
x = app.Data(app.Count:app.Count+19,1);
y = app.Data(app.Count:app.Count+19,2);
%passing the axes on which graph is displayed
app.Count = app.Count + 20;
if app.Count > 100
app.Count = 1;
Attached the app file for reference. Hope this helps

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