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comparison src/rand.cc @ 519:b9284136189a

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[project @ 1994-07-19 14:40:20 by jwe]
author jwe
date Tue, 19 Jul 1994 14:42:19 +0000
parents 309fc59f66ee
children 20fbad23ae51
comparison
equal deleted inserted replaced
518:2349d5721cd9 519:b9284136189a
23 23
24 #ifdef HAVE_CONFIG_H 24 #ifdef HAVE_CONFIG_H
25 #include "config.h" 25 #include "config.h"
26 #endif 26 #endif
27 27
28 #include <time.h>
29
28 #include "tree-const.h" 30 #include "tree-const.h"
29 #include "f77-uscore.h" 31 #include "f77-uscore.h"
30 #include "error.h" 32 #include "error.h"
31 #include "utils.h" 33 #include "utils.h"
32 #include "f-rand.h" 34 #include "defun-dld.h"
33 35
34 // Possible distributions of random numbers. 36 // Possible distributions of random numbers.
35 enum rand_dist { uniform, normal }; 37 enum rand_dist { uniform, normal };
36 38
37 // Current distribution of random numbers. 39 // Current distribution of random numbers.
42 int *F77_FCN (dgennor) (double*, double*, double*); 44 int *F77_FCN (dgennor) (double*, double*, double*);
43 int *F77_FCN (dgenunf) (double*, double*, double*); 45 int *F77_FCN (dgenunf) (double*, double*, double*);
44 int *F77_FCN (setall) (int*, int*); 46 int *F77_FCN (setall) (int*, int*);
45 int *F77_FCN (getsd) (int*, int*); 47 int *F77_FCN (getsd) (int*, int*);
46 } 48 }
47
48 #ifdef WITH_DLD
49 Octave_object
50 builtin_rand_2 (const Octave_object& args, int nargout)
51 {
52 return rand_internal (args, nargout);
53 }
54 #endif
55 49
56 static double 50 static double
57 curr_rand_seed (void) 51 curr_rand_seed (void)
58 { 52 {
59 union d2i { double d; int i[2]; }; 53 union d2i { double d; int i[2]; };
96 else if (current_distribution == normal) 90 else if (current_distribution == normal)
97 return "normal"; 91 return "normal";
98 else 92 else
99 { 93 {
100 panic_impossible (); 94 panic_impossible ();
101 return (char *) NULL; 95 return 0;
102 } 96 }
103 } 97 }
104 98
105 Octave_object 99 DEFUN_DLD ("rand", Frand, Srand, 2, 1,
106 rand_internal (const Octave_object& args, int nargout) 100 "rand -- generate a random value\n\
107 { 101 \n\
108 // Assumes that we have been given the correct number of arguments. 102 rand (N) -- generate N x N matrix\n\
109 103 rand (A) -- generate matrix the size of A\n\
104 rand (N, M) -- generate N x M matrix\n\
105 rand (\"dist\") -- get current distribution\n\
106 rand (DISTRIBUTION) -- set distribution type (\"normal\" or \"uniform\"\n\
107 rand (SEED) -- get current seed\n\
108 rand (SEED, N) -- set seed")
109 {
110 Octave_object retval; 110 Octave_object retval;
111 111
112 int nargin = args.length (); 112 int nargin = args.length ();
113
114 if (nargin > 3 || nargout > 1)
115 {
116 print_usage ("rand");
117 return retval;
118 }
113 119
114 static int initialized = 0; 120 static int initialized = 0;
115 if (! initialized) 121 if (! initialized)
116 { 122 {
117 // Make the random number generator give us a different sequence every 123 // Make the random number generator give us a different sequence every