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cume_dist() and percent_rank() react strangely to NA value inside mutate() #4427

clanker opened this issue Jun 17, 2019 · 1 comment


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@clanker clanker commented Jun 17, 2019

cume_dist() and percent_rank() computed values within mutate do not ignore NA values

I'm expecting values as in the column correct when computing these two functions on mutate-generated gain, just as it is correct when computed directly on b-a. I don't think the results of the ecdf and correct columns should differ. I include pct_rank to show that function is also affected.

df <- tibble(a = runif(1000, -1, 1), b = runif(1000, -1, 1))
df[df < 0] <- NA
df <- df %>%
  mutate(gain = b - a)
df <- df %>%
  mutate(ecdf = cume_dist(gain), 
         correct = cume_dist(b - a),
         pct_rank = percent_rank(gain)) 
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@lock lock bot commented Dec 15, 2019

This old issue has been automatically locked. If you believe you have found a related problem, please file a new issue (with reprex) and link to this issue.

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