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=Introduction=
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One of the great things about Rave is that it can work not only with static [[data sets]], but with functions of variables that appear in [[data sets]]. For example, if you load a [[data set]] that contains a variable called "Weight (lbs)", you can easily create a new variable called "Weight (kg)" whose values are equal to Weight (lbs) / 2.2046. If later the values for the variable Weight (lbs) change, the values for Weight (kg) will automatically update to reflect that change, because the two are functionally related.
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The above example is an extremely simple function. In general there is no limit to how complicated your function can be, although if the function takes a long time to run it may be impractical for some applications. Functions can have multiple variables as inputs, and may have other [[functional variables]] as inputs as well (for example, y = f(x), z = g(y)).
  
Fatal error: Uncaught TypeError: MWExceptionHandler::handleException(): Argument #1 ($e) must be of type Exception, Error given in /var/www/vhosts/rave.gatech.edu/httpdocs/help/includes/exception/MWExceptionHandler.php:153 Stack trace: #0 [internal function]: MWExceptionHandler::handleException() #1 {main} thrown in /var/www/vhosts/rave.gatech.edu/httpdocs/help/includes/exception/MWExceptionHandler.php on line 153