VRdShift

Routine

void VRdShift (double x[], int Nkeep, int Nshift)

Purpose

Shift the elements of an array of doubles

Description

  x[i+Nshift] --> x[i], for i from 0 to Nkeep-1

For a shift up (Nshift negative), the elements of the array are shifted up to the top of the array. The input array must have at least Nkeep - Nshift elements (Nshift being negative).

  x[i] --> x[i-Nshift], for i from Nkeep-1 to 0

Parameters

<-> double x[]

Array of doubles (Nkeep + |Nshift| elements)

-> int Nkeep

Number of elements to be retained

-> int Nshift

Number of positions to be shifted. Nshift is positive for a shift down and negative for a shift up.

Author / revision