Plot 2 Y axes using GUI and Handle structures

I am using handle structures to create my figures and want two Y axes. When I create the second y axis it deletes the first. What I am trying to achieve is a histogram (left axis) and CDF (right axis) on the one plot.

What am I missing in my code? Thanks.

        hs.A_PT_PnLPct = axes;
        hs.A_PT_PnLPct.Parent = hs.Fig;
        hs.A_PT_PnLPct.Title.String = 'Returns';
        hs.A_PT_PnLPct.FontSize = 8;
        hs.A_PT_PnLPct.Title.FontSize = 10;
        hs.A_PT_PnLPct.XLabel.String = 'Return %';
        hs.A_PT_PnLPct.YAxisLocation = 'Left';
        hs.A_PT_PnLPct.YLabel.String = 'Frequency';
        hs.A_PT_PnLPct.Units = 'pixels';
        hs.A_PT_PnLPct.XGrid  = 'on';
        hs.A_PT_PnLPct.YGrid  = 'on';
        hold( hs.A_PT_PnLPct, 'on' );
        hs.A_PT_PnLPct.YAxisLocation = 'Right';
        hs.A_PT_PnLPct.YLabel.String = 'CDF';
        hs.A_PT_PnLPct.Position = [990 430 300 300];

Answer 1

[Josh]

I think you might have to make two axes objects on top of each other. Plot your histogram on one and the CDF on the other.

% Create axes

a1 = axes; a2 = axes;

% Ensure that axes are overlayed:

a2.Position = a1.Position;

% Move second y-axis to the right:

a2.YAxisLocation='Right';

% Turn off second x-axs:

a2.XAxis.Visible='off';

% Set the second axis (the one on top) to have a clear background:

a2.Color='none';