How to combine 2 Matlab figure plots?

I have created 2 lines on the same plot. I need to take an average of them and add a 3rd line on this figure. Any idea how may I easily do so ? I am attaching the .fig (test_combine.fig) file as well.

Thanks

Answer 1

[Star Strider]

Perhaps —

F = openfig('test_combine.fig');
Lines = findobj(F,'Type','line');
for k = 1:numel(Lines)
    x{k} = Lines(k).XData;
    y{k} = Lines(k).YData;
    nlLine(k) = numel(x{k});
end
nlLine

nlLine = 1×2

4000 4000

ymtx = [y{1}; y{2}];
aymean = mean(ymtx);
gymean = geomean(ymtx);

plot(x{1}, aymean, '-k', 'DisplayName','Arithmetic Mean')
plot(x{1}, gymean, '--k', 'DisplayName','Geometric Mean')
legend('Location','best')

EDIT — (24 Jul 2023 at 15:51)

For a weighted mean, you would have to supply a (2x1) weighting vector and then multiply each row of ‘ymtx’ (in my code) by the appropriate weight scalar. To weight the elements of each vector, provide a weighting vector and then use element-wise multiplication (.* instead of *).

.

[Anshuman]

Can you show the code for weighted mean? Thanks

[Star Strider]

Probably something like this —

F = openfig('test_combine.fig');
Lines = findobj(F,'Type','line');
for k = 1:numel(Lines)
    x{k} = Lines(k).XData;
    y{k} = Lines(k).YData;
    nlLine(k) = numel(x{k});
end
% nlLine

nlLine = 1×2

4000 4000

ymtx = [y{1}; y{2}];
wv = [1;10];                                                    % Weight Vector (Rows)
ymtx = ymtx .* wv;
aymean = mean(ymtx);
gymean = geomean(ymtx);

plot(x{1}, aymean, '-k', 'DisplayName','Arithmetic Mean')
plot(x{1}, gymean, '--k', 'DisplayName','Geometric Mean')
legend('Location','best')

The ‘wv’ vector weights the first row at 1 and the second row at 10. (The code uses the same matrix for both the arithmetic and geometric mean.)

.

Answer 2

[Raheel Naveed]

Greetings,

You can take average of data along Y-axis using mean() function.

Assuming your , y-axis data as y1 and y2, we can use below code to create a 3rd graph on same figure

hold on % to plot on same figure
yAvg=mean([y1:y2]) % You can replace your variables here

In case, there's still any problem, share the whole code for better debugging (or .mat file )

[Anshuman]

What about weighted mean?

[Anshuman]

It says Unrecognized function or variable 'y1'. How will I assign plots to variables?