matlab - Reversing one y-axis of a plotyy -

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my code:

figure [ax, h1, h2] = plotyy(x1,y1,x2,y2,'semilogy','semilogy');

now want reverse direction of second y-axis. tried adding:

set(h2,'ydir','reverse');

but results in following error:

the name 'ydir' not accessible property instance of class 'lineseries'.

ydir writeable property of axis, not of graphics object:

set(ax(2),'ydir','reverse')

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