Rounding numbers

Brief intro to rounding

You can use the base R round() function to round numbers.

?round

For instance, it is a good rule of thumb to report the standard deviation to one more digit than the mean:

mydata <- c(4.4, 8.5, 10.1, 14.0, 3.9)
mean.mydata <- mean(mydata)
sd.mydata <- sd(mydata)

Now round the numbers:

round(mean.mydata, digits = 2)
#> [1] 8.18
round(sd.mydata, digits = 3)
#> [1] 4.191