CODEWITHSUNDEEP
matlabplotoctave
sancho.s ReinstateMonicaCellio
sancho.s ReinstateMonicaCellio

Reputation: 15621

fplot with secondary Y axis

Is it possible to fplot a function on a secondary Y axis? I found out about plotyy in Octave, and yyaxis left or yyaxis right in Matlab. But they do not seem to combine with fplot.

Upvotes: 0

Views: 720

Answers (1)

Matthias W.
Matthias W.

Reputation: 1077

The following applies to Matlab - I cannot give you guidance for Octave. Futhermore I do not have R2016a so I could not test yyaxis (which is also not required in my given solution).

What about a workaround using

[X,Y] = fplot(fun,limits,...) returns the abscissas and ordinates for fun in X and Y. No plot is drawn on the screen; however, you can plot the function using plot(X,Y).

So a complexe sample looks like this:

xmin = -2;
xmax =  2;

fh1 = @tanh;
fh2 = @sin;
[x1,y1] = fplot(fh1, [xmin, xmax]);
[x2,y2] = fplot(fh2, [xmin, xmax]);
y2 = 1.5 * y2; % rescale to get different min/max values than y1

plotyy(x1,y1,x2,y2)

You can even have different limits for the x axis if you want to.

Test plot

Upvotes: 1

Related Questions