[R] dplyr summarize by groups

[tgs77m m@iii@g oii y@hoo@com]

# Get mean, min, max sigma and skew by group

 options (digits = 3)
 library (ISwR
data(energy)

data %>%
  group_by(stature) %>%
  summarize(
    Mean = mean(expend),
    Min =  min(expend),
    Max = max(expend),
    Sigma = sd(expend),
    Skew = skew(expend))

# Output

  stature  Mean   Min   Max Sigma  Skew
  <fct>   <dbl> <dbl> <dbl> <dbl> <dbl>
1 lean     8.07  6.13  10.9  1.24 0.907
2 obese   10.3   8.79  12.8  1.40 0.587

Why does output stats vary in decimal places even when options (digits=3)
were set?

All the best

Thomas S.




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