How can I use splitapply() in matlab appdesigner?

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Muazma Ali 2024-2-11

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评论： Cris LaPierre 2024-2-12

Hi! :)

I have matlab 2018 and really dont want to upgrade to newer versions right now.

What I was wondering was whether anybody could show with an easy example how I can apply splitapply() to group my data in a 2 dimensional plot. Earlier I have seen a post regarding this issue but I didnt understand how to do that..

I have a heterogenous table osmotic data and I want to group my 2 d plot with the text data showing the bestsalts which is a colum containing two salts each row, like CaCl2 NaCl , ZnBr2 KCl

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Matt J 2024-2-11

If you provide some example data and the desired result, then perhaps.

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Answer 1

Cris LaPierre 2024-2-11

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编辑：Cris LaPierre 2024-2-11

在 MATLAB Online 中打开

You could use a differnt function that incorporates grouping, like gscatter.

load carsmall

gscatter(Displacement,Horsepower,Model_Year)

To specifically use splitapply, create an anonymous function with your plotting command. Something like this (I'm specivically trying to duplicate gscatter here).

figure

hold on

[G,ID] = findgroups(Model_Year);

splitapply(@(x)plot(x(:,1),x(:,2),'.','MarkerSize',20),[Displacement,Horsepower],G)

legend(string(ID),'Location','best')

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Cris LaPierre 2024-2-12

在 MATLAB Online 中打开

Here's what the actual callback funciton might look like. I'm assuming the data to plot is a property of the app. See this page if you don't know what that means:

https://www.mathworks.com/help/matlab/creating_guis/share-data-across-callbacks-in-app-designer.html

function ButtonPushed(app, event)
    hold(app.UIAxes,"on")
    [G,ID] = findgroups(app.Model_Year);
    splitapply(@(x)plot(app.UIAxes,x(:,1),x(:,2),'.','MarkerSize',20),[app.Displacement,app.Horsepower],G);
    legend(app.UIAxes,string(ID),'Location','best')
end