abs()

abs()

The abs() function will produce the absolute value for a number.

Example: 

The code below will take the residuals from the empty model for Thumb in the Fingers data frame, and give back their absolute value.

empty_model <- lm(Thumb ~ NULL, data = Fingers)
Fingers$Residual <- resid(empty_model)
abs(Fingers$Residual)

Example output:
​
output of absolute values

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