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Throw error for NULL labels passed to callouts #440

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thongsav-usgs opened this issue Feb 14, 2017 · 0 comments
Open

Throw error for NULL labels passed to callouts #440

thongsav-usgs opened this issue Feb 14, 2017 · 0 comments
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@thongsav-usgs
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gsplot() %>% callouts(NA, NA, labels=NULL) produces the error:

Error in text.default(x = numeric(0), y = numeric(0), labels = NULL, pos = c(1,  : 
  no coordinates were supplied

I believe it's caused by labels being null, but a more explicit error message helping the caller identify the issue would be useful.
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