Need help creating an object "svar" using group_by, and summarize

[bxa75023]

I am getting an error object "avg" not found.... what am I missing?

svar <- polls %>% select(pollster, avg, s) %>%
group_by(pollster) %>%
summarize(avg=mean(spread), s=sd(spread))

[andresrcs]

This is happening because you are trying to select avg before you create this variable in the summarize command, try dropping the redundant select command.

svar <- polls %>%
  group_by(pollster) %>%
  summarize(avg=mean(spread), s=sd(spread))

[bxa75023]

Thanks, for pointing out my error!

[andresrcs]

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