Get the real value of an R expression.

The result of the evaluation as a real.

The following example retrieves the mean of the speed/dist ratios for the cars dataset into the variable realvar:

 realvar:=Rgetreal('mean(cars$speed/cars$dist)')

If cmd contains more than one statement, the returned value is the result of the last one. If the results is NA, then a NaN value is returned. The returned value is first converted to numeric within R.

Rgetarr, Rgetbool, Rgetint, Rgetstr