The following code works in CoCalc

cases <- c(36, 531, 4233, 8682, 7164, 2229, 600, 164, 57, 722, 1517, 1828, 
1539, 2416, 3148, 3465, 1440)
deaths <- c(0, 0, 130, 552, 738, 414, 198, 90, 56, 50, 71, 137, 178, 194, 290, 
310, 149) 
plot(ts(cases), col="red", main="Influenza Epidemic")
lines(ts(10*deaths),col="blue”)

However, I get the following error when I try to plot this in a Sage cell

Error in plot.new() : cairo error 'error while writing to output stream'
Error in plot.xy(xy.coords(x, y), type = type, ...) : 
  plot.new has not been called yet

I may or may not get the plot.

Other R plots seem to work in the Sage cells.  Any ideas?

Tom

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