Matlab figure: The legend replaces the graph completely and there is no graph

I am trying to plot four matrices as a line graph with two y axes, when the legend is added it completely replaces the graph and covers the whole figure. I believe the graph is not even behind the legend. There is just one empty figure with a full-screen legend! not graphs! Same thing happens if I just plot the graph and add the legend manually in the figure wondow. Here is my code and I would be grateful if you could help me fix it.

load('PS1.mat')
load("PS2.mat")
load("PS21.mat")
load("PS22.mat")

figure;
yyaxis left; % Use the left y-axis
plot(PS1, 'DisplayName', 'Scenario 1', 'Color', rand(1,3));
hold on;
plot(PS2(:, 1), 'DisplayName', 'Scenario 2', 'Color', rand(1,3));
plot(PS21, 'DisplayName', 'Scenario 3', 'Color', rand(1,3));
plot(PS22, 'DisplayName', 'Scenario 4', 'Color', rand(1,3));
ylabel('Optimal (h)');

% Adding the second column of D with a second y-axis
yyaxis right; % Use the right y-axis
plot(PS2(:, 2), 'DisplayName', 'Scenario 2', 'Color', rand(1,3));
ylabel('Modules');

% Adding legend
lgd.Position = [0.85, 0.65, 0.1, 0.1];

% Adding x-axis label
xlabel('Demand');

% Display the grid
grid on;

[Adam Danz]

I tried to reporduce the issue using fake data since I don't have access to PS1... files. I also notcied your reproduction code doesn't include generating a legeng (lgd is not defined). After replacing your data with fake data and adding a call to legend, this is the result below.

figure;
yyaxis left; % Use the left y-axis
plot(1:5, 'DisplayName', 'Scenario 1', 'Color', rand(1,3));
hold on;
plot(1:5, 'DisplayName', 'Scenario 2', 'Color', rand(1,3));
plot(1:5, 'DisplayName', 'Scenario 3', 'Color', rand(1,3));
plot(1:5, 'DisplayName', 'Scenario 4', 'Color', rand(1,3));
ylabel('Optimal (h)');

% Adding the second column of D with a second y-axis
yyaxis right; % Use the right y-axis
plot(1:5, 'DisplayName', 'Scenario 2', 'Color', rand(1,3));
ylabel('Modules');

% Adding legend
ldg = legend();
lgd.Position = [0.85, 0.65, 0.1, 0.1];

% Adding x-axis label
xlabel('Demand');

% Display the grid
grid on;

[Sherwin]

@Adam Danz thank you so much for your help. There should be five plots. Did you just generated fake data for one of the matrices?

[Sherwin]

This is what I get even after adding the line for generating the legend:

This happens a lot even when I try to add the legend manually. I can either have the legend or the graph not both of them.

[Sherwin]

These are the errors I get when the legend is generated and replaces the graph:

Warning: Error occurred while executing the listener callback for event Reparent defined for class matlab.graphics.axis.Axes:
Execution of script set as a function is not supported:
C:\Users\Elino\OneDrive\Documents\MATLAB\ENCI711\Copy_of_Publish Version\set.m

Error in matlab.graphics.shape.internal.AxesLayoutManager

Error in matlab.graphics.shape.internal.AxesLayoutManager>@(h,e)localReparentCB(h,e,hObj)

Error in matlab.graphics.shape.internal.AxesLayoutManager/insertAboveAxes

Error in matlab.graphics.shape.internal.AxesLayoutManager.getManager

Error in legendcolorbarlayout (line 34)
    hManager  = matlab.graphics.shape.internal.AxesLayoutManager.getManager(hAx);

Error in matlab.graphics.illustration.Legend/setAxesImpl

Error in matlab.graphics.illustration.Legend/set.Axes_I

Error in matlab.graphics.illustration.Legend/set.Axes

Error in legend>make_legend (line 345)
        leg.Axes = ha;

Error in legend (line 263)
    make_legend(ha,args(arg:end),version, limitMaxLegendEntries);

Error in insertmenufcn (line 70)
                    leg = legend(cax); 
> In matlab.graphics.shape.internal/AxesLayoutManager/insertAboveAxes
In matlab.graphics.shape.internal.AxesLayoutManager.getManager
In legendcolorbarlayout (line 34)
In matlab.graphics.illustration/Legend/setAxesImpl
In matlab.graphics.illustration/Legend/set.Axes_I
In matlab.graphics.illustration/Legend/set.Axes
In legend>make_legend (line 345)
In legend (line 263)
In insertmenufcn (line 70) 
Execution of script set as a function is not supported:
C:\Users\Elino\OneDrive\Documents\MATLAB\ENCI711\Copy_of_Publish Version\set.m

Error in legend (line 273)
    set(0,'CurrentFigure',old_currfig);

Error in insertmenufcn (line 70)
                    leg = legend(cax);
 
Error while evaluating ToggleTool ClickedCallback.

Warning: Error updating AxesLayoutManager.

 Unable to compute axes layout information
 

[Sherwin]

@Walter Roberson Hi, sorry can you please help me with this problem? It keeps happening to all my plots even with one y axis.

[Adam Danz]

Looks like @Walter Roberson came to rescue!

@Sherwin, thanks for sharing the error messages. Always include those from the start if they are appearing ;)

[Sherwin]

@Adam Danz yeah, @Walter Roberson is my hero. He has saved me several times :)

Thank you @Adam Danz for your help too. Sure, I thought about sharing the error messages in the last minutes. Sorry about that :)

[Adam Danz]

Don't forget to formally "accept" the answer :)

[Sherwin]

@Adam Danz Thank you so much for the reminder :)

Answer 1

[Walter Roberson]

C:\Users\Elino\OneDrive\Documents\MATLAB\ENCI711\Copy_of_Publish Version\set.m

You need to rename that file, or move it so that it is not on your MATLAB path.

[Sherwin]

Thanks a zillion!