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f617db13 MW |
1 | ;;; -*-emacs-lisp-*- |
2 | ||
3 | ;;; --- Homebrew functions --- | |
4 | ||
5 | (autoload 'calc-tabular-command "calc-alg-2") | |
6 | ||
7 | (defun calc-path-length (&optional var low high) | |
8 | "Computes the path length of a parametric function. | |
9 | ||
10 | The stack should contain a vector containing the (rectangular only, I'm | |
11 | afraid) components of a vector-valued function. The independent variable is | |
12 | prompted for. If the Hyp flag is set, limits for the parameter are requested | |
13 | and a definite path length is computed; otherwise an indefinite result is | |
14 | computed. | |
15 | ||
16 | The path length of a function `r(t)' between limits `a' and `b' is computed | |
17 | as | |
18 | b | |
19 | / | |
20 | | |r(t)| dt | |
21 | / | |
22 | a | |
23 | ||
24 | If, as is likely, the result is unintegrable, a numeric result can be | |
25 | obtained using `z n' (`calc-integrate-numerically')." | |
26 | (interactive "sPath length variable: ") | |
27 | (if (calc-is-hyperbolic) | |
28 | (calc-tabular-command 'calcFunc-path-length "Path length" "path" | |
29 | nil var low high) | |
30 | (calc-slow-wrapper | |
31 | (if (or (equal var "") (equal var "$")) | |
32 | (calc-enter-result 2 "path" (list 'calcFunc-path-length | |
33 | (calc-top-n 2) | |
34 | (calc-top-n | |
35 | 1))) | |
36 | (let ((var (math-read-expr var))) | |
37 | (if (eq (car-safe var) 'error) | |
38 | (error "Bad format in expression: %s" | |
39 | (nth 1 var))) | |
40 | (calc-enter-result 1 "path" (list | |
41 | 'calcFunc-path-length | |
42 | (calc-top-n 1) | |
43 | var))))))) | |
44 | ||
45 | (defun calcFunc-path-length (f x &optional a b) | |
46 | (let ((d (math-simplify (list 'calcFunc-deriv f x)))) | |
47 | (append (list 'calcFunc-integ | |
48 | (list 'calcFunc-sqrt (list '* d d)) | |
49 | x) | |
50 | (and a b (list a b))))) | |
17481fee MW |
51 | (put 'calc-define 'calc-path-length |
52 | '(progn (define-key calc-mode-map "zp" 'calc-path-length))) | |
f617db13 MW |
53 | |
54 | (defvar var-IntegNumerRules 'calc-IntegNumerRules) | |
55 | (defun calc-IntegNumerRules () | |
56 | (math-read-plain-expr "[ | |
57 | integ(f, x, a, b) := ninteg(f, x, a, b) :: constant(a) :: constant(b) | |
58 | ]")) | |
59 | ||
60 | (defun calc-integrate-numerically () | |
61 | "Computes an approximate result for a symbolic definite integral with | |
62 | constant bounds." | |
63 | (interactive) | |
64 | (calc-slow-wrapper | |
65 | (calc-enter-result 1 "intn" | |
66 | (math-rewrite (calc-top-n 1) var-IntegNumerRules 5)))) | |
17481fee MW |
67 | (put 'calc-define 'calc-integrate-numerically |
68 | '(progn (define-key calc-mode-map "zn" 'calc-integrate-numerically))) | |
69 | ||
f617db13 MW |
70 | |
71 | ;;; Mode settings stored by Calc on Mon Mar 15 16:25:50 2004 | |
72 | (setq calc-group-char " ") | |
73 | (setq calc-frac-format '("/" nil)) | |
74 | (setq calc-date-format '(Www " " D " " Mmmm " " YYYY (", " h ":" mm ":" ss))) | |
75 | (setq calc-standard-date-formats '("N" "<H:mmCSSpp >Www Mmm D, YYYY" "YYYY-MM-DD< hh:mm:ss>" "Www Mmm BD< hh:mm:ss> YYYY" "Www D Mmmm YYYY<, h:mm:ss>" "D.M.Y< h:mm:SS>" "M-D-Y< H:mm:SSpp>" "D-M-Y< h:mmCSS>" "j<, h:mm:SS>" "YYddd< hh:mm:ss>")) | |
76 | (setq calc-complex-format 'i) | |
77 | (setq calc-previous-modulo '(bigpos 296 967 294 4)) | |
78 | (setq calc-angle-mode 'rad) | |
79 | ;;; End of mode settings | |
80 | ||
f617db13 MW |
81 | ;;; Custom units stored by Calc on Thu Mar 18 19:02:50 1999 |
82 | (setq math-additional-units '( | |
f0bf9506 MW |
83 | (EB "1024 * PB" "Exabyte") |
84 | (PB "1024 * TB" "Petabyte") | |
f617db13 MW |
85 | (TB "1024 * GB" "Terabyte") |
86 | (gig "GB" "Gigabyte") | |
87 | (GB "1024 * MB" "Gigabyte") | |
88 | (meg "MB" "Megabyte") | |
40d54672 MW |
89 | (MB "1024 * kB" "Megabyte") |
90 | (KB "kB" "Kilobyte") | |
91 | (kB "1024 * byte" "Kilobyte") | |
f0bf9506 MW |
92 | (Eb "1024 * Pb" "Exabit") |
93 | (Pb "1024 * Tb" "Petabit") | |
f617db13 MW |
94 | (Tb "1024 * Gb" "Teraabit") |
95 | (Gb "1024 * Mb" "Gigabit") | |
40d54672 MW |
96 | (Mb "1024 * kb" "Megabit") |
97 | (Kb "kb" "Kilobit") | |
98 | (kb "1024 * bit" "Kilobit") | |
f617db13 MW |
99 | (byte "octet" "Byte") |
100 | (octet "8 * bit" "Octet") | |
030f5e98 | 101 | (bit nil "Bit"))) |
f617db13 MW |
102 | ;;; End of custom units |
103 | ||
dc209c5a | 104 | ;;; Variable "var-AlgSimpRules" stored by Calc on Thu Jan 6 21:04:23 2000 |
5025cdbc MW |
105 | (setq var-AlgSimpRules |
106 | '(vec (calcFunc-assign | |
107 | (+ (^ (calcFunc-sin (var x var-x)) 2) | |
108 | (^ (calcFunc-cos (var x var-x)) 2)) | |
109 | 1) | |
110 | (calcFunc-assign | |
111 | (calcFunc-exp (var x var-x)) | |
112 | (^ (var e var-e) (var x var-x))))) | |
dc209c5a | 113 | |
f617db13 | 114 | ;;; Variable "var-DeMoivre" stored by Calc on Fri Mar 19 16:06:10 1999 |
5025cdbc MW |
115 | (setq var-DeMoivre |
116 | '(vec (calcFunc-assign | |
117 | (^ (var e var-e) (var x var-x)) | |
118 | (calcFunc-exp (var x var-x))) | |
119 | (calcFunc-assign | |
120 | (calcFunc-exp (* (var i var-i) (var t var-t))) | |
121 | (calcFunc-evalsimp (+ (calcFunc-cos (var t var-t)) | |
122 | (* (var i var-i) | |
123 | (calcFunc-sin (var t var-t)))))))) | |
f617db13 MW |
124 | |
125 | ;;; Variable "var-TrigDefRules" stored by Calc on Tue Jan 4 13:47:34 2000 | |
5025cdbc MW |
126 | (setq var-TrigDefRules |
127 | '(vec (calcFunc-phase 1) | |
128 | (calcFunc-assign | |
129 | (calcFunc-sin (var t var-t)) | |
130 | (/ (- (^ (var e var-e) (* (var i var-i) (var t var-t))) | |
131 | (^ (var e var-e) (neg (* (var i var-i) (var t var-t))))) | |
132 | (* 2 (var i var-i)))) | |
133 | (calcFunc-assign | |
134 | (calcFunc-cos (var t var-t)) | |
135 | (/ (+ (^ (var e var-e) (* (var i var-i) (var t var-t))) | |
136 | (^ (var e var-e) (neg (* (var i var-i) (var t var-t))))) | |
137 | 2)) | |
138 | (calcFunc-assign | |
139 | (calcFunc-arcsin (var x var-x)) | |
140 | (* (neg (var i var-i)) | |
141 | (calcFunc-ln (- (* (var i var-i) (var x var-x)) | |
142 | (calcFunc-sqrt (- 1 | |
143 | (^ (var x var-x) 2))))))) | |
144 | (calcFunc-assign | |
145 | (calcFunc-arccos (var x var-x)) | |
146 | (* (neg (var i var-i)) | |
147 | (calcFunc-ln (- (var x var-x) | |
148 | (calcFunc-sqrt (- (^ (var x var-x) 2) | |
149 | 1)))))) | |
150 | (calcFunc-assign | |
151 | (calcFunc-arctan (var x var-x)) | |
152 | (* (frac -1 2) | |
153 | (* (var i var-i) | |
154 | (calcFunc-ln (/ (+ 1 (* (var i var-i) | |
155 | (var x var-x))) | |
156 | (- 1 (* (var i var-i) | |
157 | (var x var-x)))))))) | |
158 | (calcFunc-assign | |
159 | (calcFunc-arctanh (var x var-x)) | |
160 | (* (frac 1 2) | |
161 | (calcFunc-ln (/ (+ 1 (var x var-x)) | |
162 | (- 1 (var x var-x)))))) | |
163 | ||
164 | (calcFunc-phase 2) | |
165 | (calcFunc-assign | |
166 | (calcFunc-tan (var t var-t)) | |
167 | (/ (calcFunc-sin (var t var-t)) | |
168 | (calcFunc-cos (var t var-t)))) | |
169 | (calcFunc-assign | |
170 | (calcFunc-sinh (var t var-t)) | |
171 | (* (neg (var i var-i)) | |
172 | (calcFunc-sin (* (var i var-i) (var t var-t))))) | |
173 | (calcFunc-assign | |
174 | (calcFunc-cosh (var t var-t)) | |
175 | (calcFunc-cos (* (var i var-i) (var t var-t)))) | |
176 | (calcFunc-assign | |
177 | (calcFunc-tanh (var t var-t)) | |
178 | (/ (calcFunc-sinh (var t var-t)) | |
179 | (calcFunc-cosh (var t var-t)))) | |
180 | (calcFunc-assign | |
181 | (calcFunc-arcsinh (var x var-x)) | |
182 | (* (neg (var i var-i)) | |
183 | (calcFunc-arcsin (* (var i var-i) (var x var-x))))) | |
184 | (calcFunc-assign | |
185 | (calcFunc-arccosh (var x var-x)) | |
186 | (* (neg (var i var-i)) (calcFunc-arccos (var x var-x)))))) |