I'm trying to convert many shapes delimited by straight lines (green in figure below) into shapes delimited by sigmoid curves (i.e., starts horizontal, curves upward, ends horizontal). This is for an alluvial plot.
This is the basic shape and its intended transformation:
Is there a way of doing this automatically, without having to select all the relevant square nodes for each shape and then converting them to curve nodes?
(Ideally something that would keep the shape section constant, rather than getting thinner in the middle like in my attempt!)
On the left you have my input and on the right, my expected output.
ggalluvialwhich however keeps the four groups attached (poor visualisation in this case), so I later use the heights as a reference to essentially remake the chart from scratch in Inkscape. Unfortunately this is not something that
ggalluvialcan do for me.