your data onto this stack. Whenever you execute an operation, it
takes as many elements from the stack as needed. Pushing is done
implicitly, so whenever you specify a number or a variable, it gets
your data onto this stack. Whenever you execute an operation, it
takes as many elements from the stack as needed. Pushing is done
implicitly, so whenever you specify a number or a variable, it gets
Pop two elements from the stack, compare them for the selected condition
and return 1 for true or 0 for false. Comparing an I<unknown> or an
Pop two elements from the stack, compare them for the selected condition
and return 1 for true or 0 for false. Comparing an I<unknown> or an
of data and how "noisy" the data series is.
This prediction can only be used for short term extrapolations - say a few days into the future-
of data and how "noisy" the data series is.
This prediction can only be used for short term extrapolations - say a few days into the future-
-Return the last/first value including its time. The time for
-FIRST is actually the start of the corresponding interval, whereas
-LAST returns the end of the corresponding interval.
+Return the last/first non-nan or infinite value for the selected data
+stream, including its timestamp.
Example: C<VDEF:first=mydata,FIRST>
=item TOTAL
Returns the rate from each defined time slot multiplied with the
Example: C<VDEF:first=mydata,FIRST>
=item TOTAL
Returns the rate from each defined time slot multiplied with the