enter link description hereCoviD varaints over time in each country
I tried re creating this graph using area plot from ggplot2. I couldn't get the peaks to smooth out. Attached is the graph I got.
I think these are sometimes referred to as Ribbon Graphs. Maybe searching with that term will get you close to what you need.
I looked up ribbon graphs and in that process found something called alluvial graph. I got this. I have purposefully cropped the states here as it is sensitive data.
Ah yeah, alluvial plots was the one I was trying to think of!
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