Permute vector

 

F_SPERMUTE/F_DPERMUTE/F_CPERMUTE/F_ZPERMUTE

Input

N

Number of elements of vector x.

 

P

REAL array, minimum length (N - 1) x incp + 1.

 

INCP

Increment for the array p. A vector p having component

 

 

pi, i = 1,..., n, is stored in an array P() with increment

 

 

argument incp. The value of incp can be positive or

 

 

negative. A negative value of incp applies the

 

 

permutation in the opposite direction. incp = 0 is an

 

 

illegal value.

 

X

REAL array, minimum length (N - 1) x incx + 1.

 

INCX

Increment for the array x. A vector x having component

 

 

xi, i = 1,..., n, is stored in an array X() with increment

 

 

argument incx. If incx > 0 then xi is stored in

 

 

X (1 + (i - 1) x incx). If incx < 0 then xi is stored in

 

 

X (1 + (N - i) x incx). incx = 0 is an illegal value.

Chapter 2 Basic Vector Operations 189