Feature Request: rel_width/height on panel size

[hoemich]

I desire to create a gird of plots with cowplot::plot_grid() in which the plots share the x-axis of the column and the y-axis of the row. I do that, by disabling the unwanted axis on the individual plots.
Now it is a pain to control the relative size of the plot areas, especially when I want to render it in various sizes.
Since the dimensions of the axis/tickmarks/labels are fixed, while the plot areas' size is flexible I need different relative sizes for the plots, depending on the rendering size.

Eventually, in tedious manual work, I try to anneal the optimal relative sizes for each column/row, for each of the required rendering dimensions.

It would be awesome, if instead I could just define relative widths of the plot areas.
I imagine either a parameter, to control whether the existing rel_width\height consider the whole plot size or just the panel size, or a second set o parameters rel_panel_width\height for which the usage is mutually exclusive to the rel_widht\height

[clauswilke]

I think you should look into the patchwork package. It may be a better solution for your specific design problem.