How do I display a plot based on the user input value?

The .mat file usage.mat contains yearBuilt, names, yearReconstruct, and score.

clear;
close all;

userInput=input("Please choose between the following numbers: 1,2 or 3.");

Test("usage.mat",userInput);

function Test(usage,userInput)
usage=load(usage); 
figure();

    if userInput==1
        figure(1);
        y=yearBuilt;
        custom = 'v r';
        z='Build Year';
    else
        figure(2);
        if userInput == 2
            y = yearReconstruct;
            y(yearReconstruct==0)= NaN;
            custom = '* b'; 
            z='Reconstruction Year';
        else
            figure(3);
        if userInput == 3
            y=score;
                custom ='. g';
                z='Overall';
        else
            disp("Invalid input value, input must be either 1, 2, or 3");
        end
        end
    end   
hold on
x=names;
plot(y,custom,'Markersize',10,'lineWidth',2,'LineStyle','none');
xlabel('output');
ylabel(z);
grid on
set(gca,'xticklabel',x.')
xtickangle(-45);
end

   
    

My code keeps displaying empty graphs or multiple empty graphs.

Answer 1

[Cris LaPierre]

You do not appear to have a variable yearBuilt. If this is part of your mat file, note that the syntax you use to load it loads it to a structure names usage.

S = load(___)

Try using dot notation to access your variables.

y=usage.yearBuilt;

One comment about your plot inputs. These two settings do opposite things. You only need one or the other. LineStyle can also be set to 'none' by not specifying a style in the linespec input (your variable custom).

'lineWidth',2,'LineStyle','none'