Combine two existing Matlab figs, into one figure with two y axes (keeping the respective axes titles and units)

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Erez
Erez 2018-8-5
编辑： Erez 2018-8-6
Hi, I have two Matlab figs, although not the original data in a *.mat file, which share the same 'x' axis, but not 'y' (one curve in each figure). I wish to combine Fig. 2 into Fig, 1, but have two y axes, with the original axis titles and units. I also wish to keep the original symbols and the same color map for the curves from the two pictures. What is the easiest way to do that?
Thank you.
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dpb
dpb 2018-8-5
编辑：dpb 2018-8-5
I think I mistyped/misnamed the new world replacement for the deprecated plotyy :)
-- it's |yyaxis| instead. Sorry...
ADDENDUM
I did just try a 'spearmint; took the example for two axes and created two figures instead of the L/R axes. Then with some rigamarole to get all the necessary handles to the lines that are children of their respective axes,
yyaxis left
hAxL=gca;
copyobj(hL1,hAxL)
yyaxis right
hAxR=gca;
copyobj(hL2,hAxR)
did bring over the line colors, markers, etc., ... I didn't experiment with the titles and all, but the basic operations seems to work ok.
Erez
Erez 2018-8-6
编辑：Erez 2018-8-6
Thanks a lot, but unfortunately it still doesn't work. Ok, I've copied your exact code. I also had a mistake, I am using Matlab 2014b, so maybe this version is not familiar with this syntax. The error message is:
"Undefined function 'yyaxis' for input arguments of
type 'char'.
Did you mean:
>> axis left "
Perhaps there is a way to download the function `yyaxis' and add it into my script?

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