1 # math for DCT, by Shiar
3 # 1.09.1 200410022255 - moved from 1.9 main
4 # 1.09.2 200410112050 - functions don't handle stack themselves,
5 # but behave like real functions
6 # 1.10.1 200410112340 - adds menu items via addmenu() call
7 # .2 200410132050 - probability functions: comb, perm, rdz
14 '+' => [2, sub { $_[1] + $_[0] }], # addition
15 '-' => [2, sub { $_[1] - $_[0] }], # substraction
16 '*' => [2, sub { $_[1] * $_[0] }], # multiplication
17 '/' => [2, sub { $_[1] / $_[0] }], # division
18 'mod' => [2, sub { $_[1] % $_[0] }], # modulo
20 'inv' => [1, sub { 1 / $_[0] }], # 1/x
21 'sqrt' => [1, sub { sqrt $_[0] }], # square root
22 'sq' => [1, sub { $_[0] * $_[0] }], # squared
23 '^' => [2, sub { $_[1] ** $_[0] }], # exponentiation
24 'xroot'=> [2, sub { $_[1] ** (1/$_[0]) }], # x-root of y
27 'log' => [1, sub { log($_[0]) / log(10) }], # logarithm
28 'alog' => [1, sub { 10 ** $_[0] }], # 10^x
29 'ln' => [1, sub { log $_[0] }], # natural logaritm
30 'lnp1' => [1, sub { log($_[0] + 1) }], # ln(x+1)
31 'exp' => [1, sub { exp $_[0] }], # e^x
32 'expm' => [1, sub { exp($_[0]) - 1 }], # exp(x)-1
35 'sin' => [1, sub { sin $_[0] }], # sine
36 'asin' => [1, sub { atan2($_[0], sqrt(1 - $_[0]*$_[0])) }], # inverse sine
37 'cos' => [1, sub { cos $_[0] }], # cosine
38 'acos' => [1, sub { atan2(sqrt(1 - $_[0]*$_[0]), $_[0]) }], # inverse cosine
39 'tan' => [1, sub { sin($_[0]) / cos($_[0]) }], # tangent
40 # 'atan' => [1, sub { }], # arctangent
42 'sinh' => [1, sub { (exp($_[0]) - exp(-$_[0])) / 2 }], # hyperbolic sine
43 'cosh' => [1, sub { (exp($_[0]) + exp(-$_[0])) / 2 }], # hyperbolic cosine
44 'tanh' => [1, sub { (exp($_[0]) - exp(-$_[0])) / (exp($_[0]) + exp(-$_[0])) }], # hyperbolic tangent (sinh/cosh)
45 'asinh'=> [1, sub { log(sqrt($_[0]**2+1) + $_[0]) }], # inverse hyperbolic sine
46 'acosh'=> [1, sub { log(sqrt($_[0]**2-1) + $_[0]) }], # inverse hyperbolic cosine
47 'atanh'=> [1, sub { log((1+$_[0]) / (1-$_[0])) / 2 }], # inverse hyperbolic tangent
50 'and' => [2, sub { $_[1] & $_[0] }], # bitwise and
51 'or' => [2, sub { $_[1] | $_[0] }], # bitwise or
52 'xor' => [2, sub { $_[1] ^ $_[0] }], # bitwise xor
53 'not' => [2, sub { ~$_[0] }], # bitwise not
54 'sl' => [1, sub { $_[0] * 2 }], # shift left
55 'sr' => [1, sub { $_[0] / 2 }], # shift right
58 '%' => [2, sub { $_[0] / $_[1] }], # percentage
59 # '%ch' => [2, sub { $val{i} = 100*(shift(@_)-$val{i})/$val{i} }], # percentage change
60 # '%t' => [2, sub { $val{i} = 100*$val{i}/shift(@_) }], # percentage total
62 'abs' => [1, sub { abs $_[0] }], # absolute #todo
63 'sign' => [1, sub { $_[0] <=> 0 }], # sign
64 'ip' => [1, sub { int $_[0] }], # integer part
65 'fp' => [1, sub { $_[0] - int $_[0] }], # fractional part
67 # 'rnd' => [1, sub { local $_ = 10**$_[0]; $val{i} = int(($val{i}+.5)*$_)/$_ }], # round
68 # 'trnc' => [1, sub { local $_ = 10**$_[0]; $val{i} = int($val{i}*$_)/$_ }], # truncate
69 'floor'=> [1, sub { int $_[0] }], # floor
70 'ceil' => [1, sub { int $_[0]+.9999 }], # ceil
72 'min' => [2, sub { $_[1]<$_[0] ? $_[1] : $_[0] }], # minimum
73 'max' => [2, sub { $_[1]>$_[0] ? $_[1] : $_[0] }], # maximum
76 'dec' => [-1, sub { $::set{base} = 10; () }], # decimal
77 'bin' => [-1, sub { $::set{base} = 2; () }], # binary
78 'oct' => [-1, sub { $::set{base} = 8; () }], # octal
79 'hex' => [-1, sub { $::set{base} = 16; () }], # hexadecimal
80 'base' => [1, sub { $::set{base} = $_[0]; () }], # alphanumerical
85 $res *= $_ for $_[1]-$_[0]+1..$_[1]; # (n-r+1)..(n-2)(n-1)n
86 $res /= $_ for 2..$_[0]; # / r!
91 $res *= $_ for $_[1]-$_[0]+1..$_[1]; # (n-r+1)..(n-2)(n-1)n
94 '!' => [1, sub { my $res = $_[0]; $res *= $_ for 2..$res-1; $res }], # factor
95 'rand' => [0, sub { rand }], # random value <1
96 'rdz' => [1, sub { srand $_[0]; () }], # seed randomizer
97 # 'ndist'=> [3], # normal distribution
98 # 'utpn' => [3], # normal distribution
99 # 'utpt' => [1], # student-t distribution
100 # 'utpc' => [2], # chi-square (χ²) distribution
101 # 'utpf' => [3], # F distribution
104 #while (my ($cmd, $val) = each %newaction) {$action{$cmd} = $val}
105 $action{$_} = $newaction{$_} for keys %newaction;
107 addmenu(["main", 0], "math",
108 [qw(basic log alog ln exp sin cos tan asin acos atan sq sqrt ^ xroot)],
112 [qw(hyperbolic sinh cosh tanh asinh acosh atanh expm lnp1)],
113 [qw(real % %ch %t min max mod abs sign mant xpon ip fp rnd trnc floor ceil r>d d>r)],
114 [qw(base dec bin oct hex),
115 [qw(logic and or xor not)],
116 [qw(bit rl sl asr sr rr)],
117 # [qw(byte rlb slb srb rrb)],
119 [qw(probability comb perm ! rand rdz)], # utpc utpf utpn utpt ndist)],
123 ) if defined &addmenu; # addmenu
127 title => "basic math",