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comparison docs/modules/txt/MathUtil.txt @ 0:4816e4a8ae95 draft default tip
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author | deepakjadmin |
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date | Wed, 20 Jan 2016 09:23:18 -0500 |
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1 NAME | |
2 MathUtil | |
3 | |
4 SYNOPSIS | |
5 use MathUtil; | |
6 | |
7 use MathUtil qw(:all); | |
8 | |
9 DESCRIPTION | |
10 MathUtil module provides a variety of common math functions not | |
11 available in core Perl package or some other useful math utilities. In | |
12 order to be consistent with other Perl functions, name of all the | |
13 functions in this package are in lowercase which differs from | |
14 MayaChemTools naming convention for function names. | |
15 | |
16 MathUtil module provides the following functions: | |
17 | |
18 GeneratePrimeNumbersUpToCount, GeneratePrimeNumbersUpToLimit, acos, | |
19 asin, ceil, floor, log10, max, min, random, round, srandom, tan | |
20 | |
21 FUNCTIONS | |
22 GeneratePrimeNumbersUpToCount | |
23 $PrimesRef = GeneratePrimeNumbersUpToCount(); | |
24 $PrimesRef = GeneratePrimeNumbersUpToCount($Count); | |
25 | |
26 Generate prime numbers up to specified *Count* of prime numbers and | |
27 return a reference to an array containing the prime numbers. | |
28 | |
29 By default, the first 1000 prime numbers are generated. The 1000th | |
30 prime number is 7919. | |
31 | |
32 The algorithm to generate prime numbers is a modification of Sieve | |
33 of Erastothenes prime number generator. | |
34 | |
35 GeneratePrimeNumbersUpToLimit | |
36 $PrimesRef = GeneratePrimeNumbersUpToLimit(); | |
37 $PrimesRef = GeneratePrimeNumbersUpToLimit($Limit); | |
38 | |
39 Generate prime numbers up to a specified *Limit* and return a | |
40 reference to an array containing the prime numbers. | |
41 | |
42 By default, the first 1000 prime numbers are generated. The 1000th | |
43 prime number is 7919 and that's why default limit is set to 7920. | |
44 | |
45 The algorithm to generate prime numbers is a modification of Sieve | |
46 of Erastothenes prime number generator. | |
47 | |
48 acos | |
49 $Value = acos($AngleInRadians); | |
50 | |
51 Returns the nverse cosine of an angle expressed in *Radians* using | |
52 Math::Trig::acos function. | |
53 | |
54 asin | |
55 $Value = asin($AngleInRadians); | |
56 | |
57 Returns the inverse sine of an angle expressed in *Radians* using | |
58 Math::Trig::asin function. | |
59 | |
60 ceil | |
61 $IntegerValue = ceil($Value); | |
62 | |
63 Returns the next largest integer for *Value* using POSIX::ceil | |
64 function. | |
65 | |
66 floor | |
67 $IntegerValue = floor($Value); | |
68 | |
69 Returns the previous smallest integer for *Value* using POSIX::floor | |
70 function. | |
71 | |
72 log10 | |
73 $Log10Value = log10($Value); | |
74 | |
75 Returns the log of *Value* using base 10. | |
76 | |
77 max | |
78 $Number = max($Number1, $Number2); | |
79 | |
80 Returns a Number corresponding to the maximum of *Number1* and | |
81 *Number2*. | |
82 | |
83 min | |
84 $Number = min($Number1, $Number2); | |
85 | |
86 Returns a Number corresponding to the minimum of *Number1* and | |
87 *Number2*. | |
88 | |
89 round | |
90 $RoundedValue = round($Number); | |
91 $RoundedValue = round($Number, $DecimalPlaces); | |
92 | |
93 Returns a value corresponding to a nearst ingeter for *Number* or | |
94 formatted to *DecimalPlaces*. | |
95 | |
96 random | |
97 $RandomNumber = random(); | |
98 $RandomNumber = random($Size); | |
99 | |
100 Returns a random number between 0 and less than 1 or specified size. | |
101 | |
102 The random number generator implemented in MayaChemTools is a | |
103 variant of linear congruential generator (LCG) as described by | |
104 Miller et al. [ Ref 120 ]. It is also referred to as Lehmer random | |
105 number generator or Park-Miller random number generator. | |
106 | |
107 Unlike Perl's core random number generator function rand, the random | |
108 number generator implemented in MayaChemTools generates consistent | |
109 random values across different platforms - Windows, CygWin, Linux, | |
110 Unix - for a specific random seed. | |
111 | |
112 srandom | |
113 $Seed = srandom($Seed); | |
114 | |
115 Sets random number seed to be used by <random> function and returns | |
116 seed value. | |
117 | |
118 The random number seed is recommeded to be an integer between 1 and | |
119 2**31 - 2 [Ref 120] which translates to be 1 and 2147483646. | |
120 | |
121 The default seed is set to 123456789. | |
122 | |
123 tan | |
124 $Value = tan($AngleInRadians); | |
125 | |
126 Returns the tangent of an angle expressed in *Radians*. | |
127 | |
128 AUTHOR | |
129 Manish Sud <msud@san.rr.com> | |
130 | |
131 SEE ALSO | |
132 Constants.pm, ConversionsUtil.pm | |
133 | |
134 COPYRIGHT | |
135 Copyright (C) 2015 Manish Sud. All rights reserved. | |
136 | |
137 This file is part of MayaChemTools. | |
138 | |
139 MayaChemTools is free software; you can redistribute it and/or modify it | |
140 under the terms of the GNU Lesser General Public License as published by | |
141 the Free Software Foundation; either version 3 of the License, or (at | |
142 your option) any later version. | |
143 |