TSP (libtsp) - VRfShift

VRfShift

Routine

void VRfShift (float x[], int Nkeep, int Nshift)

Purpose

Shift the elements of an array of floats

Description

This routine shifts elements of a float array. If the number of elements to be retained is zero, no action is taken. For a shift down (Nshift positive), the elements of the array are shifted down to the bottom of the array. The input array must have at least Nkeep + Nshift elements.

  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

<-> float x[]: Array of floats (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