Piloting graph in app designer

Hello friends.

I am trying to create an app in Matlab app designer to plot data from tables.

I want the app to sum the second and third columns then plot the sum of these columns various the first column in the table.

i am facing proplem "Unrecognized method, property, or field 'Var1' for class 'matlab.ui.control.Table'" when i am trying to plot variables i hope you could help me with this problem.

Answer 1

[Cris LaPierre]

Ok, app.BS is a uitable. app.BS.Data is the information displayed in that uitable.

What I would do, then, is create a property in the app to hold the raw data loaded from BS.txt.

properties (Access = private)
    data % raw data from text file
end

I would add a new variable summing Var2 and Var3 to it (I called it app.data). Then I would plot Var1 vs this new variable.

% Button pushed function: ChooseButton
function ChooseButtonPushed(app, event)
   [filename, pathname] = uigetfile({'*.txt'}, 'File Selector');
   app.data = readtable (fullfile(pathname, filename), 'HeaderLines', 0);
   app.BS.Data = app.data;
   app.BSEditField.Value = filename;
end

% Button pushed function: DisplayButton
function DisplayButtonPushed(app, event)
    app.data.sumVars = app.data.Var2+app.data.Var3;
    plot(app.UIAxes, app.BS.Data.Var1,app.data.sumVars)
end

[Bilal Larouzi]

thank you. it works.

Answer 2

[Cris LaPierre]

I suspect the variables app.BS.Var1 and app.BS.Var2 don't exist. Perhaps the variable app.BS.Data.Var1 does?

Still, there is an easier way to do this.

1. Create a new table variable that is the sum of columns 2 and 3
2. Plot column one vs the new column

app.BS.Data.sumVars = app.BS.Data(:,2)+app.BS.Data(:,3);
plot(app.UIAxes,app.BS.Data(:,1),app.BS.Data.sumVars)

[Bilal Larouzi]

Thank you for your answer. but it still doesn't work.

[Cris LaPierre]

Try updating it to

app.BS.Data.sumVars = app.BS.Data.(2)+app.BS.Data.(3);
plot(app.UIAxes,app.BS.Data(:,1),app.BS.Data.sumVars)

If that doesn't work, please save your variable BS to a mat file and attach it to your post.

[Bilal Larouzi]

i have attached app and the BS file