PERIMETER Perimeter (length) of a polygon. P = PERIMETR(X,Y) Returns perimeter (length) of a polygon (or a sequence of line segments) defined by coordinates X,Y (vectors of equal length). For closed polygons must be X(1) = X(length(X)) and Y(1) = Y(length(Y)). PERIMETR(X+i*Y) is the same as PERIMETR(X,Y).

- diff DIFF - This function tries to differentiate the variables in
- end END - basic end method for HFRC objects.
- real REAL - takes real part of HFRC objects. Useful for
- size SIZE - returns [ (num times), (num gridpts) ].
- perimetr PERIMETER Perimeter (length) of a polygon.

- perimetr PERIMETER Perimeter (length) of a polygon.

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