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serrls.f
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1*> \brief \b SERRLS
2*
3* =========== DOCUMENTATION ===========
4*
5* Online html documentation available at
6* http://www.netlib.org/lapack/explore-html/
7*
8* Definition:
9* ===========
10*
11* SUBROUTINE SERRLS( PATH, NUNIT )
12*
13* .. Scalar Arguments ..
14* CHARACTER*3 PATH
15* INTEGER NUNIT
16* ..
17*
18*
19*> \par Purpose:
20* =============
21*>
22*> \verbatim
23*>
24*> SERRLS tests the error exits for the REAL least squares
25*> driver routines (SGELS, SGELSS, SGELSY, SGELSD).
26*> \endverbatim
27*
28* Arguments:
29* ==========
30*
31*> \param[in] PATH
32*> \verbatim
33*> PATH is CHARACTER*3
34*> The LAPACK path name for the routines to be tested.
35*> \endverbatim
36*>
37*> \param[in] NUNIT
38*> \verbatim
39*> NUNIT is INTEGER
40*> The unit number for output.
41*> \endverbatim
42*
43* Authors:
44* ========
45*
46*> \author Univ. of Tennessee
47*> \author Univ. of California Berkeley
48*> \author Univ. of Colorado Denver
49*> \author NAG Ltd.
50*
51*> \ingroup single_lin
52*
53* =====================================================================
54 SUBROUTINE serrls( PATH, NUNIT )
55*
56* -- LAPACK test routine --
57* -- LAPACK is a software package provided by Univ. of Tennessee, --
58* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
59*
60* .. Scalar Arguments ..
61 CHARACTER*3 PATH
62 INTEGER NUNIT
63* ..
64*
65* =====================================================================
66*
67* .. Parameters ..
68 INTEGER NMAX
69 parameter( nmax = 2 )
70* ..
71* .. Local Scalars ..
72 CHARACTER*2 C2
73 INTEGER INFO, IRNK
74 REAL RCOND
75* ..
76* .. Local Arrays ..
77 INTEGER IP( NMAX )
78 REAL A( NMAX, NMAX ), B( NMAX, NMAX ), S( NMAX ),
79 $ W( NMAX )
80* ..
81* .. External Functions ..
82 LOGICAL LSAMEN
83 EXTERNAL lsamen
84* ..
85* .. External Subroutines ..
86 EXTERNAL alaesm, chkxer, sgels, sgelsd, sgelss, sgelsy
87* ..
88* .. Scalars in Common ..
89 LOGICAL LERR, OK
90 CHARACTER*32 SRNAMT
91 INTEGER INFOT, NOUT
92* ..
93* .. Common blocks ..
94 COMMON / infoc / infot, nout, ok, lerr
95 COMMON / srnamc / srnamt
96* ..
97* .. Executable Statements ..
98*
99 nout = nunit
100 WRITE( nout, fmt = * )
101 c2 = path( 2: 3 )
102 a( 1, 1 ) = 1.0e+0
103 a( 1, 2 ) = 2.0e+0
104 a( 2, 2 ) = 3.0e+0
105 a( 2, 1 ) = 4.0e+0
106 ok = .true.
107*
108 IF( lsamen( 2, c2, 'LS' ) ) THEN
109*
110* Test error exits for the least squares driver routines.
111*
112* SGELS
113*
114 srnamt = 'SGELS '
115 infot = 1
116 CALL sgels( '/', 0, 0, 0, a, 1, b, 1, w, 1, info )
117 CALL chkxer( 'SGELS ', infot, nout, lerr, ok )
118 infot = 2
119 CALL sgels( 'N', -1, 0, 0, a, 1, b, 1, w, 1, info )
120 CALL chkxer( 'SGELS ', infot, nout, lerr, ok )
121 infot = 3
122 CALL sgels( 'N', 0, -1, 0, a, 1, b, 1, w, 1, info )
123 CALL chkxer( 'SGELS ', infot, nout, lerr, ok )
124 infot = 4
125 CALL sgels( 'N', 0, 0, -1, a, 1, b, 1, w, 1, info )
126 CALL chkxer( 'SGELS ', infot, nout, lerr, ok )
127 infot = 6
128 CALL sgels( 'N', 2, 0, 0, a, 1, b, 2, w, 2, info )
129 CALL chkxer( 'SGELS ', infot, nout, lerr, ok )
130 infot = 8
131 CALL sgels( 'N', 2, 0, 0, a, 2, b, 1, w, 2, info )
132 CALL chkxer( 'SGELS ', infot, nout, lerr, ok )
133 infot = 10
134 CALL sgels( 'N', 1, 1, 0, a, 1, b, 1, w, 1, info )
135 CALL chkxer( 'SGELS ', infot, nout, lerr, ok )
136*
137* SGELSS
138*
139 srnamt = 'SGELSS'
140 infot = 1
141 CALL sgelss( -1, 0, 0, a, 1, b, 1, s, rcond, irnk, w, 1, info )
142 CALL chkxer( 'SGELSS', infot, nout, lerr, ok )
143 infot = 2
144 CALL sgelss( 0, -1, 0, a, 1, b, 1, s, rcond, irnk, w, 1, info )
145 CALL chkxer( 'SGELSS', infot, nout, lerr, ok )
146 infot = 3
147 CALL sgelss( 0, 0, -1, a, 1, b, 1, s, rcond, irnk, w, 1, info )
148 CALL chkxer( 'SGELSS', infot, nout, lerr, ok )
149 infot = 5
150 CALL sgelss( 2, 0, 0, a, 1, b, 2, s, rcond, irnk, w, 2, info )
151 CALL chkxer( 'SGELSS', infot, nout, lerr, ok )
152 infot = 7
153 CALL sgelss( 2, 0, 0, a, 2, b, 1, s, rcond, irnk, w, 2, info )
154 CALL chkxer( 'SGELSS', infot, nout, lerr, ok )
155*
156* SGELSY
157*
158 srnamt = 'SGELSY'
159 infot = 1
160 CALL sgelsy( -1, 0, 0, a, 1, b, 1, ip, rcond, irnk, w, 10,
161 $ info )
162 CALL chkxer( 'SGELSY', infot, nout, lerr, ok )
163 infot = 2
164 CALL sgelsy( 0, -1, 0, a, 1, b, 1, ip, rcond, irnk, w, 10,
165 $ info )
166 CALL chkxer( 'SGELSY', infot, nout, lerr, ok )
167 infot = 3
168 CALL sgelsy( 0, 0, -1, a, 1, b, 1, ip, rcond, irnk, w, 10,
169 $ info )
170 CALL chkxer( 'SGELSY', infot, nout, lerr, ok )
171 infot = 5
172 CALL sgelsy( 2, 0, 0, a, 1, b, 2, ip, rcond, irnk, w, 10,
173 $ info )
174 CALL chkxer( 'SGELSY', infot, nout, lerr, ok )
175 infot = 7
176 CALL sgelsy( 2, 0, 0, a, 2, b, 1, ip, rcond, irnk, w, 10,
177 $ info )
178 CALL chkxer( 'SGELSY', infot, nout, lerr, ok )
179 infot = 12
180 CALL sgelsy( 2, 2, 1, a, 2, b, 2, ip, rcond, irnk, w, 1, info )
181 CALL chkxer( 'sgelsy', INFOT, NOUT, LERR, OK )
182*
183* SGELSD
184*
185 SRNAMT = 'sgelsd'
186 INFOT = 1
187 CALL SGELSD( -1, 0, 0, A, 1, B, 1, S, RCOND, IRNK, W, 10,
188 $ IP, INFO )
189 CALL CHKXER( 'sgelsd', INFOT, NOUT, LERR, OK )
190 INFOT = 2
191 CALL SGELSD( 0, -1, 0, A, 1, B, 1, S, RCOND, IRNK, W, 10,
192 $ IP, INFO )
193 CALL CHKXER( 'sgelsd', INFOT, NOUT, LERR, OK )
194 INFOT = 3
195 CALL SGELSD( 0, 0, -1, A, 1, B, 1, S, RCOND, IRNK, W, 10,
196 $ IP, INFO )
197 CALL CHKXER( 'sgelsd', INFOT, NOUT, LERR, OK )
198 INFOT = 5
199 CALL SGELSD( 2, 0, 0, A, 1, B, 2, S, RCOND, IRNK, W, 10,
200 $ IP, INFO )
201 CALL CHKXER( 'sgelsd', INFOT, NOUT, LERR, OK )
202 INFOT = 7
203 CALL SGELSD( 2, 0, 0, A, 2, B, 1, S, RCOND, IRNK, W, 10,
204 $ IP, INFO )
205 CALL CHKXER( 'sgelsd', INFOT, NOUT, LERR, OK )
206 INFOT = 12
207 CALL SGELSD( 2, 2, 1, A, 2, B, 2, S, RCOND, IRNK, W, 1, IP,
208 $ INFO )
209 CALL CHKXER( 'sgelsd', INFOT, NOUT, LERR, OK )
210 END IF
211*
212* Print a summary line.
213*
214 CALL ALAESM( PATH, OK, NOUT )
215*
216 RETURN
217*
218* End of SERRLS
219*
220 END
chkxer
subroutine chkxer(srnamt, infot, nout, lerr, ok)
Definition cblat2.f:3196
alaesm
subroutine alaesm(path, ok, nout)
ALAESM
Definition alaesm.f:63
sgelsd
subroutine sgelsd(m, n, nrhs, a, lda, b, ldb, s, rcond, rank, work, lwork, iwork, info)
SGELSD computes the minimum-norm solution to a linear least squares problem for GE matrices
Definition sgelsd.f:210
sgelss
subroutine sgelss(m, n, nrhs, a, lda, b, ldb, s, rcond, rank, work, lwork, info)
SGELSS solves overdetermined or underdetermined systems for GE matrices
Definition sgelss.f:172
sgelsy
subroutine sgelsy(m, n, nrhs, a, lda, b, ldb, jpvt, rcond, rank, work, lwork, info)
SGELSY solves overdetermined or underdetermined systems for GE matrices
Definition sgelsy.f:204
sgels
subroutine sgels(trans, m, n, nrhs, a, lda, b, ldb, work, lwork, info)
SGELS solves overdetermined or underdetermined systems for GE matrices
Definition sgels.f:183
serrls
subroutine serrls(path, nunit)
SERRLS
Definition serrls.f:55