Prevent Matlab from updating the legend when saving a figure

I have a figure with a tiled layout and some plots which – because they are partly related – I don’t want to give them all their own legend entry, but rather summarise several plots with one entry. I do this by subsequently changing the legend entries to display several line types, like in this example:

leg = legend([plot1, plot2], {‘Plot1’, ‘Plot2’});
drawnow();
% Update legend
hLegendEntryTop = leg.EntryContainer.NodeChildren(end); % top row of legend
iconSet = hLegendEntryTop.Icon.Transform.Children.Children; % array of icons
% Move primary line up
iconSet(1).VertexData(2,1) = 0.65;
iconSet(1).VertexData(2,2) = 0.65;
% Create a new line
iconSet(2) = copy(iconSet(1)); % copy the object
iconSet(2) = iconSet(1).Parent; % set the parent, adding to the legend’s icon draw set
% Move primary line down
iconSet(2).VertexData(2,1) = 0.35;
iconSet(2).VertexData(2,2) = 0.35;
iconSet(2).LineStyle = ‘dashed’;
…… % Do the same with other plot lines
saveas(gcf,’figure’,’epsc’)

Interestingly, it works when exporting as PNG, but not when exporting as eps or pdf (vector graphics). The image is then updated and all additional lines inserted disappear again. I have absolutely no idea how I can prevent Matlab from updating the legend again when saving.I have a figure with a tiled layout and some plots which – because they are partly related – I don’t want to give them all their own legend entry, but rather summarise several plots with one entry. I do this by subsequently changing the legend entries to display several line types, like in this example:

Interestingly, it works when exporting as PNG, but not when exporting as eps or pdf (vector graphics). The image is then updated and all additional lines inserted disappear again. I have absolutely no idea how I can prevent Matlab from updating the legend again when saving. I have a figure with a tiled layout and some plots which – because they are partly related – I don’t want to give them all their own legend entry, but rather summarise several plots with one entry. I do this by subsequently changing the legend entries to display several line types, like in this example:

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