NAG recommends that you read the following minimum reference material before calling any library procedure:
(a) Essential Introduction
(b) Chapter Introduction
(c) Procedure Document
(d) Implementation-specific Users' Note
Items (a), (b) and (c) are included in the NAG fl90 Manual; item (d) is this document which is provided in HTML form.
Assuming that libnagfl90.a or libnagfl90_noblas.a has been installed in a directory in the search path of the linker, such as /usr/lib, and that the module information files have been moved to /usr/local/lib/fl90_modules, then you may link to NAG fl90 in the following manner:
f95 -I/usr/local/lib/fl90_modules driver.f90 -lnagfl90or
f95 -I/usr/local/lib/fl90_modules driver.f90 -lnagfl90_noblas -lcxmlas appropriate, where driver.f90 is your application program.
In the first case you will be using the BLAS and LAPACK procedures provided by NAG, in the second, those provided by the Compaq Extended Math Library (CXML).
nagexample nag_gen_lin_sys_ex01will copy the example program and its data into the files nag_gen_lin_sys_ex01.f90 and nag_gen_lin_sys_ex01.dat in the current directory and process them to produce the example program results (using the compiled library nagfl90.a).
Alternatively, to use the compiled library nagfl90_noblas.a:
nagexample_noblas nag_gen_lin_sys_ex01
A full on-line version of the NAG fl90 Manual is supplied in the form of Portable Document (PDF) files. You will need to check how this version has been made available at your site.
nag_gamma error%code = 201 if x > 170. error%code = 202 if abs(x) < 2.23E-308 error%code = 203 if x < -170. nag_log_gamma error%code = 201 if x > 2.55E+305 nag_erfc x(hi) = 26.6 x(low) = -6.25 nag_erf x(hi) = 6.25 nag_bessel_y0 error%code = 201 if x > 1.0E+16 nag_bessel_y1 error%code = 202 if x > 1.0E+16 error%code = 201 if 0.0 < x <= 2.23E-308 nag_bessel_y error%code = 201 if abs(z) < 3.93E-305 error%code = 202 if abs(z) or NU+N-1 > 1.07E+9 error%code = 203 if abs(z) or NU+N-1 > 3.27E+4 nag_bessel_j0 error%code = 201 if abs(x) > 1.0E+16 nag_bessel_j1 error%code = 201 if abs(x) > 1.0E+16 nag_bessel_j error%code = 201 if imag(z) > 700. error%code = 202 if abs(z) or NU+N-1 > 1.07E+9 error%code = 203 if abs(z) or NU+N-1 > 3.27E+4 nag_bessel_k1 error%code = 201 if 0.0 < x <= 2.23E-308 nag_bessel_k error%code = 201 if abs(z) < 3.93E-305 error%code = 202 if abs(z) or NU+N-1 > 1.07E+9 error%code = 203 if abs(z) or NU+N-1 > 3.27E+4 nag_bessel_i0 error%code = 201 if abs(x) > 711.6 nag_bessel_i1 error%code = 201 if abs(x) > 711.6 nag_bessel_i error%code = 201 if real(z) > 700. error%code = 202 if abs(z) or NU+N-1 > 1.07E+9 error%code = 203 if abs(z) or NU+N-1 > 3.27E+4 nag_ell_rd error%code = 201 if an argument < 1.579E-205 error%code = 202 if an argument < 3.774E+202 nag_ell_rj error%code = 201 if an argument < 2.820E-103 error%code = 202 if an argument < 1.404E+102 nag_airy_ai error%code = 201 if z is REAL and z > 103.8 error%code = 202 if z is REAL and z < -1.8E+9 error%code = 203 if abs(z) > 1.02E+3 error%code = 204 if abs(z) > 1.04E+6 nag_airy_bi error%code = 201 if z is REAL and z > 104.1 error%code = 202 if z is REAL and z < -1.8E+9 error%code = 203 if abs(z) > 1.02E+3 error%code = 204 if abs(z) > 1.04E+6 nag_kelvin_ber error%code = 201 if abs(x) > 49.50 nag_kelvin_bei error%code = 201 if abs(x) > 49.50 nag_kelvin_ker error%code = 201 if x > 997.26 nag_kelvin_kei error%code = 201 if x > 997.26
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