Query: slasrt2
OS: debian
Section: 3
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
SLASRT2(l) LAPACK routine (version 1.5) SLASRT2(l)NAMESLASRT2 - the numbers in D in increasing order (if ID = 'I') or in decreasing order (if ID = 'D' )SYNOPSISSUBROUTINE SLASRT2( ID, N, D, KEY, INFO ) CHARACTER ID INTEGER INFO, N INTEGER KEY( * ) REAL D( * )PURPOSESort the numbers in D in increasing order (if ID = 'I') or in decreasing order (if ID = 'D' ). Use Quick Sort, reverting to Insertion sort on arrays of size <= 20. Dimension of STACK limits N to about 2**32.ARGUMENTSID (input) CHARACTER*1 = 'I': sort D in increasing order; = 'D': sort D in decreasing order. N (input) INTEGER The length of the array D. D (input/output) REAL array, dimension (N) On entry, the array to be sorted. On exit, D has been sorted into increasing order (D(1) <= ... <= D(N) ) or into decreasing order (D(1) >= ... >= D(N) ), depending on ID. KEY (input/output) INTEGER array, dimension (N) On entry, KEY contains a key to each of the entries in D() Typically, KEY(I) = I for all I On exit, KEY is permuted in exactly the same manner as D() was permuted from input to output Therefore, if KEY(I) = I for all I upon input, then D_out(I) = D_in(KEY(I)) INFO (output) INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value LAPACK version 1.5 12 May 1997 SLASRT2(l)
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