LAPACK  3.8.0 LAPACK: Linear Algebra PACKage

## ◆ dchkqr()

 subroutine dchkqr ( logical, dimension( * ) DOTYPE, integer NM, integer, dimension( * ) MVAL, integer NN, integer, dimension( * ) NVAL, integer NNB, integer, dimension( * ) NBVAL, integer, dimension( * ) NXVAL, integer NRHS, double precision THRESH, logical TSTERR, integer NMAX, double precision, dimension( * ) A, double precision, dimension( * ) AF, double precision, dimension( * ) AQ, double precision, dimension( * ) AR, double precision, dimension( * ) AC, double precision, dimension( * ) B, double precision, dimension( * ) X, double precision, dimension( * ) XACT, double precision, dimension( * ) TAU, double precision, dimension( * ) WORK, double precision, dimension( * ) RWORK, integer, dimension( * ) IWORK, integer NOUT )

DCHKQR

Purpose:
` DCHKQR tests DGEQRF, DORGQR and DORMQR.`
Parameters
 [in] DOTYPE ``` DOTYPE is LOGICAL array, dimension (NTYPES) The matrix types to be used for testing. Matrices of type j (for 1 <= j <= NTYPES) are used for testing if DOTYPE(j) = .TRUE.; if DOTYPE(j) = .FALSE., then type j is not used.``` [in] NM ``` NM is INTEGER The number of values of M contained in the vector MVAL.``` [in] MVAL ``` MVAL is INTEGER array, dimension (NM) The values of the matrix row dimension M.``` [in] NN ``` NN is INTEGER The number of values of N contained in the vector NVAL.``` [in] NVAL ``` NVAL is INTEGER array, dimension (NN) The values of the matrix column dimension N.``` [in] NNB ``` NNB is INTEGER The number of values of NB and NX contained in the vectors NBVAL and NXVAL. The blocking parameters are used in pairs (NB,NX).``` [in] NBVAL ``` NBVAL is INTEGER array, dimension (NNB) The values of the blocksize NB.``` [in] NXVAL ``` NXVAL is INTEGER array, dimension (NNB) The values of the crossover point NX.``` [in] NRHS ``` NRHS is INTEGER The number of right hand side vectors to be generated for each linear system.``` [in] THRESH ``` THRESH is DOUBLE PRECISION The threshold value for the test ratios. A result is included in the output file if RESULT >= THRESH. To have every test ratio printed, use THRESH = 0.``` [in] TSTERR ``` TSTERR is LOGICAL Flag that indicates whether error exits are to be tested.``` [in] NMAX ``` NMAX is INTEGER The maximum value permitted for M or N, used in dimensioning the work arrays.``` [out] A ` A is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] AF ` AF is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] AQ ` AQ is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] AR ` AR is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] AC ` AC is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] B ` B is DOUBLE PRECISION array, dimension (NMAX*NRHS)` [out] X ` X is DOUBLE PRECISION array, dimension (NMAX*NRHS)` [out] XACT ` XACT is DOUBLE PRECISION array, dimension (NMAX*NRHS)` [out] TAU ` TAU is DOUBLE PRECISION array, dimension (NMAX)` [out] WORK ` WORK is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] RWORK ` RWORK is DOUBLE PRECISION array, dimension (NMAX)` [out] IWORK ` IWORK is INTEGER array, dimension (NMAX)` [in] NOUT ``` NOUT is INTEGER The unit number for output.```
Date
December 2016

Definition at line 203 of file dchkqr.f.

203 *
204 * -- LAPACK test routine (version 3.7.0) --
205 * -- LAPACK is a software package provided by Univ. of Tennessee, --
206 * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
207 * December 2016
208 *
209 * .. Scalar Arguments ..
210  LOGICAL tsterr
211  INTEGER nm, nmax, nn, nnb, nout, nrhs
212  DOUBLE PRECISION thresh
213 * ..
214 * .. Array Arguments ..
215  LOGICAL dotype( * )
216  INTEGER iwork( * ), mval( * ), nbval( * ), nval( * ),
217  \$ nxval( * )
218  DOUBLE PRECISION a( * ), ac( * ), af( * ), aq( * ), ar( * ),
219  \$ b( * ), rwork( * ), tau( * ), work( * ),
220  \$ x( * ), xact( * )
221 * ..
222 *
223 * =====================================================================
224 *
225 * .. Parameters ..
226  INTEGER ntests
227  parameter( ntests = 9 )
228  INTEGER ntypes
229  parameter( ntypes = 8 )
230  DOUBLE PRECISION zero
231  parameter( zero = 0.0d0 )
232 * ..
233 * .. Local Scalars ..
234  CHARACTER dist, type
235  CHARACTER*3 path
236  INTEGER i, ik, im, imat, in, inb, info, k, kl, ku, lda,
237  \$ lwork, m, minmn, mode, n, nb, nerrs, nfail, nk,
238  \$ nrun, nt, nx
239  DOUBLE PRECISION anorm, cndnum
240 * ..
241 * .. Local Arrays ..
242  INTEGER iseed( 4 ), iseedy( 4 ), kval( 4 )
243  DOUBLE PRECISION result( ntests )
244 * ..
245 * .. External Functions ..
246  LOGICAL dgennd
247  EXTERNAL dgennd
248 * ..
249 * .. External Subroutines ..
250  EXTERNAL alaerh, alahd, alasum, derrqr, dgeqrs, dget02,
253 * ..
254 * .. Intrinsic Functions ..
255  INTRINSIC max, min
256 * ..
257 * .. Scalars in Common ..
258  LOGICAL lerr, ok
259  CHARACTER*32 srnamt
260  INTEGER infot, nunit
261 * ..
262 * .. Common blocks ..
263  COMMON / infoc / infot, nunit, ok, lerr
264  COMMON / srnamc / srnamt
265 * ..
266 * .. Data statements ..
267  DATA iseedy / 1988, 1989, 1990, 1991 /
268 * ..
269 * .. Executable Statements ..
270 *
271 * Initialize constants and the random number seed.
272 *
273  path( 1: 1 ) = 'Double precision'
274  path( 2: 3 ) = 'QR'
275  nrun = 0
276  nfail = 0
277  nerrs = 0
278  DO 10 i = 1, 4
279  iseed( i ) = iseedy( i )
280  10 CONTINUE
281 *
282 * Test the error exits
283 *
284  IF( tsterr )
285  \$ CALL derrqr( path, nout )
286  infot = 0
287  CALL xlaenv( 2, 2 )
288 *
289  lda = nmax
290  lwork = nmax*max( nmax, nrhs )
291 *
292 * Do for each value of M in MVAL.
293 *
294  DO 70 im = 1, nm
295  m = mval( im )
296 *
297 * Do for each value of N in NVAL.
298 *
299  DO 60 in = 1, nn
300  n = nval( in )
301  minmn = min( m, n )
302  DO 50 imat = 1, ntypes
303 *
304 * Do the tests only if DOTYPE( IMAT ) is true.
305 *
306  IF( .NOT.dotype( imat ) )
307  \$ GO TO 50
308 *
309 * Set up parameters with DLATB4 and generate a test matrix
310 * with DLATMS.
311 *
312  CALL dlatb4( path, imat, m, n, TYPE, kl, ku, anorm, mode,
313  \$ cndnum, dist )
314 *
315  srnamt = 'DLATMS'
316  CALL dlatms( m, n, dist, iseed, TYPE, rwork, mode,
317  \$ cndnum, anorm, kl, ku, 'No packing', a, lda,
318  \$ work, info )
319 *
320 * Check error code from DLATMS.
321 *
322  IF( info.NE.0 ) THEN
323  CALL alaerh( path, 'DLATMS', info, 0, ' ', m, n, -1,
324  \$ -1, -1, imat, nfail, nerrs, nout )
325  GO TO 50
326  END IF
327 *
328 * Set some values for K: the first value must be MINMN,
329 * corresponding to the call of DQRT01; other values are
330 * used in the calls of DQRT02, and must not exceed MINMN.
331 *
332  kval( 1 ) = minmn
333  kval( 2 ) = 0
334  kval( 3 ) = 1
335  kval( 4 ) = minmn / 2
336  IF( minmn.EQ.0 ) THEN
337  nk = 1
338  ELSE IF( minmn.EQ.1 ) THEN
339  nk = 2
340  ELSE IF( minmn.LE.3 ) THEN
341  nk = 3
342  ELSE
343  nk = 4
344  END IF
345 *
346 * Do for each value of K in KVAL
347 *
348  DO 40 ik = 1, nk
349  k = kval( ik )
350 *
351 * Do for each pair of values (NB,NX) in NBVAL and NXVAL.
352 *
353  DO 30 inb = 1, nnb
354  nb = nbval( inb )
355  CALL xlaenv( 1, nb )
356  nx = nxval( inb )
357  CALL xlaenv( 3, nx )
358  DO i = 1, ntests
359  result( i ) = zero
360  END DO
361  nt = 2
362  IF( ik.EQ.1 ) THEN
363 *
364 * Test DGEQRF
365 *
366  CALL dqrt01( m, n, a, af, aq, ar, lda, tau,
367  \$ work, lwork, rwork, result( 1 ) )
368
369 *
370 * Test DGEQRFP
371 *
372  CALL dqrt01p( m, n, a, af, aq, ar, lda, tau,
373  \$ work, lwork, rwork, result( 8 ) )
374
375  IF( .NOT. dgennd( m, n, af, lda ) )
376  \$ result( 9 ) = 2*thresh
377  nt = nt + 1
378  ELSE IF( m.GE.n ) THEN
379 *
380 * Test DORGQR, using factorization
381 * returned by DQRT01
382 *
383  CALL dqrt02( m, n, k, a, af, aq, ar, lda, tau,
384  \$ work, lwork, rwork, result( 1 ) )
385  END IF
386  IF( m.GE.k ) THEN
387 *
388 * Test DORMQR, using factorization returned
389 * by DQRT01
390 *
391  CALL dqrt03( m, n, k, af, ac, ar, aq, lda, tau,
392  \$ work, lwork, rwork, result( 3 ) )
393  nt = nt + 4
394 *
395 * If M>=N and K=N, call DGEQRS to solve a system
396 * with NRHS right hand sides and compute the
397 * residual.
398 *
399  IF( k.EQ.n .AND. inb.EQ.1 ) THEN
400 *
401 * Generate a solution and set the right
402 * hand side.
403 *
404  srnamt = 'DLARHS'
405  CALL dlarhs( path, 'New', 'Full',
406  \$ 'No transpose', m, n, 0, 0,
407  \$ nrhs, a, lda, xact, lda, b, lda,
408  \$ iseed, info )
409 *
410  CALL dlacpy( 'Full', m, nrhs, b, lda, x,
411  \$ lda )
412  srnamt = 'DGEQRS'
413  CALL dgeqrs( m, n, nrhs, af, lda, tau, x,
414  \$ lda, work, lwork, info )
415 *
416 * Check error code from DGEQRS.
417 *
418  IF( info.NE.0 )
419  \$ CALL alaerh( path, 'DGEQRS', info, 0, ' ',
420  \$ m, n, nrhs, -1, nb, imat,
421  \$ nfail, nerrs, nout )
422 *
423  CALL dget02( 'No transpose', m, n, nrhs, a,
424  \$ lda, x, lda, b, lda, rwork,
425  \$ result( 7 ) )
426  nt = nt + 1
427  END IF
428  END IF
429 *
430 * Print information about the tests that did not
431 * pass the threshold.
432 *
433  DO 20 i = 1, ntests
434  IF( result( i ).GE.thresh ) THEN
435  IF( nfail.EQ.0 .AND. nerrs.EQ.0 )
436  \$ CALL alahd( nout, path )
437  WRITE( nout, fmt = 9999 )m, n, k, nb, nx,
438  \$ imat, i, result( i )
439  nfail = nfail + 1
440  END IF
441  20 CONTINUE
442  nrun = nrun + ntests
443  30 CONTINUE
444  40 CONTINUE
445  50 CONTINUE
446  60 CONTINUE
447  70 CONTINUE
448 *
449 * Print a summary of the results.
450 *
451  CALL alasum( path, nout, nfail, nrun, nerrs )
452 *
453  9999 FORMAT( ' M=', i5, ', N=', i5, ', K=', i5, ', NB=', i4, ', NX=',
454  \$ i5, ', type ', i2, ', test(', i2, ')=', g12.5 )
455  RETURN
456 *
457 * End of DCHKQR
458 *
subroutine dlacpy(UPLO, M, N, A, LDA, B, LDB)
DLACPY copies all or part of one two-dimensional array to another.
Definition: dlacpy.f:105
subroutine dlatb4(PATH, IMAT, M, N, TYPE, KL, KU, ANORM, MODE, CNDNUM, DIST)
DLATB4
Definition: dlatb4.f:122
subroutine alahd(IOUNIT, PATH)
ALAHD
Definition: alahd.f:107
logical function dgennd(M, N, A, LDA)
DGENND
Definition: dgennd.f:70
subroutine alaerh(PATH, SUBNAM, INFO, INFOE, OPTS, M, N, KL, KU, N5, IMAT, NFAIL, NERRS, NOUT)
ALAERH
Definition: alaerh.f:149
subroutine derrqr(PATH, NUNIT)
DERRQR
Definition: derrqr.f:57
subroutine dlarhs(PATH, XTYPE, UPLO, TRANS, M, N, KL, KU, NRHS, A, LDA, X, LDX, B, LDB, ISEED, INFO)
DLARHS
Definition: dlarhs.f:206
subroutine dqrt01p(M, N, A, AF, Q, R, LDA, TAU, WORK, LWORK, RWORK, RESULT)
DQRT01P
Definition: dqrt01p.f:128
subroutine dlatms(M, N, DIST, ISEED, SYM, D, MODE, COND, DMAX, KL, KU, PACK, A, LDA, WORK, INFO)
DLATMS
Definition: dlatms.f:323
subroutine dget02(TRANS, M, N, NRHS, A, LDA, X, LDX, B, LDB, RWORK, RESID)
DGET02
Definition: dget02.f:135
subroutine dqrt01(M, N, A, AF, Q, R, LDA, TAU, WORK, LWORK, RWORK, RESULT)
DQRT01
Definition: dqrt01.f:128
subroutine xlaenv(ISPEC, NVALUE)
XLAENV
Definition: xlaenv.f:83
subroutine dqrt02(M, N, K, A, AF, Q, R, LDA, TAU, WORK, LWORK, RWORK, RESULT)
DQRT02
Definition: dqrt02.f:137
subroutine dgeqrs(M, N, NRHS, A, LDA, TAU, B, LDB, WORK, LWORK, INFO)
DGEQRS
Definition: dgeqrs.f:123
subroutine dqrt03(M, N, K, AF, C, CC, Q, LDA, TAU, WORK, LWORK, RWORK, RESULT)
DQRT03
Definition: dqrt03.f:138
subroutine alasum(TYPE, NOUT, NFAIL, NRUN, NERRS)
ALASUM
Definition: alasum.f:75
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