I have recently started learning R.  I converted a Stata datafile into an R
image file, but I am unable to do anything with the data.  For example, I am
unable to calculate the mean of any variable or create a scatterplot of some
of the data.  I always get a message saying, "Error in plot(rgnpc, incmean)
: object "rgnpc" not found" when I attempt to make a simple plot of the two
noted variables.  I get the following when I attempt to get the mean of a
particular variable: "Error in mean(incmean) : object "incmean" not found."

What should I do?

Cordially,

Alex

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