In addition, NAG recommends that before calling any library routine you should read the following reference material (see Section 5):
(a) Essential Introduction
(b) Chapter Introduction
(c) Routine Document
If you intend to use the NAG library within a multithreaded application please refer to the document on Thread Safety.
The libraries supplied with this implementation have been compiled in a manner that facilitates the use of multiple threads.
The shortcut
Within this window you may compile your program and link to the NAG Library in the following manner:
efl driver.f nagbl.lib advapi32.lib netapi32.libwhere driver.f is your application program.
If the Intel Math Kernel Library (MKL) is installed, and you wish to resolve calls to BLAS and LAPACK using MKL, the following may be used :
efl driver.f nag.lib mkl_lapack.lib mkl_itp.lib advapi32.lib netapi32.libThe above applies to MKL version 5.2. Refer to the MKL documentation for the library names in other releases.
The example programs are most easily accessed by the script nagex.bat, which will provide you with a copy of an example program (and its data, if any), compile the program and link it with the library (showing you the compile command so that you can recompile your own version of the program). Finally, the executable program will be run.
If the first argument to the script is "-mkl", the example program is linked with the version of the NAG library that uses the MKL BLAS and LAPACK. Your LIB and PATH environment variables must be set correctly to locate the MKL .LIB and .DLL files.
The example program concerned is specified by the argument to nagex.bat, e.g.
nagex c06eafwill copy the example program and its data into the files c06eafe.f and c06eafe.d in the current folder and process them to produce the example program results, which are placed in the file c06eace.res in the current folder.
In the NAG Fortran Library Manual, routine documents that have been typeset since Mark 12 present the example programs in a generalised form, using bold italicised terms as described in Section 3.3.
In other routine documents, the example programs are in single precision and require modification for use with double precision routines. This conversion can entail:
The example programs supplied to a site in machine-readable form have been modified as necessary so that they are suitable for immediate execution. Note that the distributed example programs are those used in this implementation and may not correspond exactly with the programs published in the manual. The distributed example programs should be used in preference wherever possible.
The distributed example results are those obtained from the NAG library, using the MKL version 5.2 BLAS and LAPACK routines. Running the examples with other BLAS or LAPACK may give slightly different results.
real - DOUBLE PRECISION (REAL*8)
basic precision - double precision
complex - COMPLEX*16
additional precision - quadruple precision (REAL*16,COMPLEX*32)
machine precision - the machine precision, see the value
returned by X02AJF in Section 4
Thus a parameter described as real should be declared as DOUBLE PRECISION in your program. If a routine accumulates an inner product in additional precision, it is using software to simulate quadruple precision.
In routine documents that have been typeset since Mark 12 additional bold italicised terms are used in the published example programs and they must be interpreted as follows:
real as an intrinsic function name - DBLE imag - DIMAG cmplx - DCMPLX conjg - DCONJG e in constants, e.g. 1.0e-4 - D, e.g. 1.0D-4 e in formats, e.g. e12.4 - D, e.g. D12.4
All references to routines in Chapter F07 - Linear Equations (LAPACK) and Chapter F08 - Least-squares and Eigenvalue Problems (LAPACK) use the LAPACK name, not the NAG F07/F08 name. The LAPACK name is precision dependent, and hence the name appears in a bold italicised typeface.
The typeset examples use the single precision form of the LAPACK name. To
convert this name to its double precision form, change the first character
either from S to D or C to Z as appropriate.
For example:
sgetrf refers to the LAPACK routine name - DGETRF cpotrs - ZPOTRS
DDOT ZHERK ZTRSM ZHSEQR
S07AAF F(1) = 1.0D+13
F(2) = 1.0D-14
S10AAF E(1) = 1.8500D+1
S10ABF E(1) = 7.080D+2
S10ACF E(1) = 7.080D+2
S13AAF x(hi) = 7.083D+2
S13ACF x(hi) = 1.0D+16
S13ADF x(hi) = 1.0D+17
S14AAF IFAIL = 1 if X > 1.70D+2
IFAIL = 2 if X < -1.70D+2
IFAIL = 3 if abs(X) < 2.23D-308
S14ABF IFAIL = 2 if X > 2.55D+305
S15ADF x(hi) = 2.66D+1
x(low) = -6.25D+0
S15AEF x(hi) = 6.25D+0
S17ACF IFAIL = 1 if X > 1.0D+16
S17ADF IFAIL = 1 if X > 1.0D+16
IFAIL = 3 if 0.0D+00 < X <= 2.23D-308
S17AEF IFAIL = 1 if abs(X) > 1.0D+16
S17AFF IFAIL = 1 if abs(X) > 1.0D+16
S17AGF IFAIL = 1 if X > 1.038D+2
IFAIL = 2 if X < -5.6D+10
S17AHF IFAIL = 1 if X > 1.041D+2
IFAIL = 2 if X < -5.6D+10
S17AJF IFAIL = 1 if X > 1.041D+2
IFAIL = 2 if X < -1.8D+9
S17AKF IFAIL = 1 if X > 1.041D+2
IFAIL = 2 if X < -1.8D+9
S17DCF IFAIL = 2 if abs (Z) < 2.11D-154
IFAIL = 4 if abs (Z) or FNU+N-1 > 3.27D+4
IFAIL = 5 if abs (Z) or FNU+N-1 > 1.07D+9
S17DEF IFAIL = 2 if imag (Z) > 7.00D+2
IFAIL = 3 if abs (Z) or FNU+N-1 > 3.27D+4
IFAIL = 4 if abs (Z) or FNU+N-1 > 1.07D+9
S17DGF IFAIL = 3 if abs (Z) > 1.02D+3
IFAIL = 4 if abs (Z) > 1.04D+6
S17DHF IFAIL = 3 if abs (Z) > 1.02D+3
IFAIL = 4 if abs (Z) > 1.04D+6
S17DLF IFAIL = 2 if abs (Z) < 2.11D-154
IFAIL = 4 if abs (Z) or FNU+N-1 > 3.27D+4
IFAIL = 5 if abs (Z) or FNU+N-1 > 1.07D+9
S18ADF IFAIL = 2 if 0.0D+00 < X <= 2.23D-308
S18AEF IFAIL = 1 if abs(X) > 7.116D+2
S18AFF IFAIL = 1 if abs(X) > 7.116D+2
S18CDF IFAIL = 2 if 0.0D+00 < X <= 2.23D-308
S18DCF IFAIL = 2 if abs (Z) < 2.11D-154
IFAIL = 4 if abs (Z) or FNU+N-1 > 3.27D+4
IFAIL = 5 if abs (Z) or FNU+N-1 > 1.07D+9
S18DEF IFAIL = 2 if real (Z) > 7.00D+2
IFAIL = 3 if abs (Z) or FNU+N-1 > 3.27D+4
IFAIL = 4 if abs (Z) or FNU+N-1 > 1.07D+9
S19AAF IFAIL = 1 if abs(x) >= 4.95000D+1
S19ABF IFAIL = 1 if abs(x) >= 4.95000D+1
S19ACF IFAIL = 1 if X > 9.9726D+2
S19ADF IFAIL = 1 if X > 9.9726D+2
S21BCF IFAIL = 3 if an argument < 1.579D-205
IFAIL = 4 if an argument >= 3.774D+202
S21BDF IFAIL = 3 if an argument < 2.820D-103
IFAIL = 4 if an argument >= 1.404D+102
X01AAF (PI) = 3.1415926535897932D+00 X01ABF (GAMMA) = 0.5772156649015329D+00
The basic parameters of the model
X02BHF = 2 X02BJF = 53 X02BKF = -1021 X02BLF = 1024 X02DJF = .TRUE.Derived parameters of the floating-point arithmetic
X02AJF = Z'3CA0000000000001' ( 1.11022302462516D-16 ) X02AKF = Z'0010000000000000' ( 2.22507385850721D-308 ) X02ALF = Z'7FEFFFFFFFFFFFFF' ( 1.79769313486231D+308 ) X02AMF = Z'0010000000000000' ( 2.22507385850721D-308 ) X02ANF = Z'0010000000000000' ( 2.22507385850721D-308 )Parameters of other aspects of the computing environment
X02AHF = Z'4950000000000000' ( 1.42724769270596D+45 ) X02BBF = 2147483647 X02BEF = 15 X02DAF = .FALSE.
A full online version of the NAG
Fortran Library Manual is supplied in
Portable Document Format (PDF), together with HTML versions of some
introductory material and HTML navigational aids. The manual may be
viewed directly from the distribution CD, or may have been installed on
local hard disk. If it has been installed on your PC, there will be a
shortcut
In addition the following are provided in the doc directory:
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