I try to plot 2 variables against each other selected by user input. But I can not figure it out. I am new to this, not much coding experience.

% Button pushed function: CheckButton

function CheckButtonPushed(app, event)

%create plot function

t = readtimetable("weather.csv"); %to read table

vars = {'HP','0/100mphsec'};

%get the selected model

selectedModel = app.SelectModelDropDown1.Value;

%find the index of the model in the table

[idx,~] = find(ismember(app.carData2{:,2}, selectedModel));

x = table2array(t(idx,'HP')); %(%specify collumn to assign x));

y = table2array(t(idx,'0/100mphsec')); %(%specify collumn to assign y));

plot (app.UIAxes,x,y);

Answer 1

[Ishan]

Hi Daniel,

I understand you are trying to plot two variables against each other from a table. You can refer to the following documentation for help with using the plot function: -

2-D line plot - MATLAB plot - MathWorks India

However, in your case I observe you are getting an error “unrecognized variable name ‘Data’” which I couldn’t locate in your xlsx file either. If you want to plot data from a table, you can simply store all elements of that particular row or column index you desire in a vector and plot them using the MATLAB plot function. (Do note that A = table2array(T) converts the table or timetable, T, to a homogeneous array, A. The variables in T become columns in A. So, the indexing needs to be done accordingly)