mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-26 10:49:33 +00:00
416 lines
13 KiB
EmacsLisp
416 lines
13 KiB
EmacsLisp
;;; calc-fin.el --- financial functions for Calc
|
|
|
|
;; Copyright (C) 1990, 1991, 1992, 1993, 2001 Free Software Foundation, Inc.
|
|
|
|
;; Author: David Gillespie <daveg@synaptics.com>
|
|
;; Maintainer: Jay Belanger <belanger@truman.edu>
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs is distributed in the hope that it will be useful,
|
|
;; but WITHOUT ANY WARRANTY. No author or distributor
|
|
;; accepts responsibility to anyone for the consequences of using it
|
|
;; or for whether it serves any particular purpose or works at all,
|
|
;; unless he says so in writing. Refer to the GNU Emacs General Public
|
|
;; License for full details.
|
|
|
|
;; Everyone is granted permission to copy, modify and redistribute
|
|
;; GNU Emacs, but only under the conditions described in the
|
|
;; GNU Emacs General Public License. A copy of this license is
|
|
;; supposed to have been given to you along with GNU Emacs so you
|
|
;; can know your rights and responsibilities. It should be in a
|
|
;; file named COPYING. Among other things, the copyright notice
|
|
;; and this notice must be preserved on all copies.
|
|
|
|
;;; Commentary:
|
|
|
|
;;; Code:
|
|
|
|
;; This file is autoloaded from calc-ext.el.
|
|
|
|
(require 'calc-ext)
|
|
(require 'calc-macs)
|
|
|
|
;;; Financial functions.
|
|
|
|
(defun calc-fin-pv ()
|
|
(interactive)
|
|
(calc-slow-wrapper
|
|
(if (calc-is-hyperbolic)
|
|
(calc-enter-result 3 "pvl" (cons 'calcFunc-pvl (calc-top-list-n 3)))
|
|
(if (calc-is-inverse)
|
|
(calc-enter-result 3 "pvb" (cons 'calcFunc-pvb (calc-top-list-n 3)))
|
|
(calc-enter-result 3 "pv" (cons 'calcFunc-pv (calc-top-list-n 3)))))))
|
|
|
|
(defun calc-fin-npv (arg)
|
|
(interactive "p")
|
|
(calc-slow-wrapper
|
|
(if (calc-is-inverse)
|
|
(calc-vector-op "npvb" 'calcFunc-npvb (1+ arg))
|
|
(calc-vector-op "npv" 'calcFunc-npv (1+ arg)))))
|
|
|
|
(defun calc-fin-fv ()
|
|
(interactive)
|
|
(calc-slow-wrapper
|
|
(if (calc-is-hyperbolic)
|
|
(calc-enter-result 3 "fvl" (cons 'calcFunc-fvl (calc-top-list-n 3)))
|
|
(if (calc-is-inverse)
|
|
(calc-enter-result 3 "fvb" (cons 'calcFunc-fvb (calc-top-list-n 3)))
|
|
(calc-enter-result 3 "fv" (cons 'calcFunc-fv (calc-top-list-n 3)))))))
|
|
|
|
(defun calc-fin-pmt ()
|
|
(interactive)
|
|
(calc-slow-wrapper
|
|
(if (calc-is-hyperbolic)
|
|
(calc-enter-result 3 "fvl" (cons 'calcFunc-fvl (calc-top-list-n 3)))
|
|
(if (calc-is-inverse)
|
|
(calc-enter-result 3 "pmtb" (cons 'calcFunc-pmtb (calc-top-list-n 3)))
|
|
(calc-enter-result 3 "pmt" (cons 'calcFunc-pmt (calc-top-list-n 3)))))))
|
|
|
|
(defun calc-fin-nper ()
|
|
(interactive)
|
|
(calc-slow-wrapper
|
|
(if (calc-is-hyperbolic)
|
|
(calc-enter-result 3 "nprl" (cons 'calcFunc-nperl (calc-top-list-n 3)))
|
|
(if (calc-is-inverse)
|
|
(calc-enter-result 3 "nprb" (cons 'calcFunc-nperb
|
|
(calc-top-list-n 3)))
|
|
(calc-enter-result 3 "nper" (cons 'calcFunc-nper
|
|
(calc-top-list-n 3)))))))
|
|
|
|
(defun calc-fin-rate ()
|
|
(interactive)
|
|
(calc-slow-wrapper
|
|
(calc-pop-push-record 3
|
|
(if (calc-is-hyperbolic) "ratl"
|
|
(if (calc-is-inverse) "ratb" "rate"))
|
|
(calc-to-percentage
|
|
(calc-normalize
|
|
(cons (if (calc-is-hyperbolic) 'calcFunc-ratel
|
|
(if (calc-is-hyperbolic) 'calcFunc-rateb
|
|
'calcFunc-rate))
|
|
(calc-top-list-n 3)))))))
|
|
|
|
(defun calc-fin-irr (arg)
|
|
(interactive "P")
|
|
(calc-slow-wrapper
|
|
(if (calc-is-inverse)
|
|
(calc-vector-op "irrb" 'calcFunc-irrb arg)
|
|
(calc-vector-op "irr" 'calcFunc-irr arg))))
|
|
|
|
(defun calc-fin-sln ()
|
|
(interactive)
|
|
(calc-slow-wrapper
|
|
(calc-enter-result 3 "sln" (cons 'calcFunc-sln (calc-top-list-n 3)))))
|
|
|
|
(defun calc-fin-syd ()
|
|
(interactive)
|
|
(calc-slow-wrapper
|
|
(calc-enter-result 4 "syd" (cons 'calcFunc-syd (calc-top-list-n 4)))))
|
|
|
|
(defun calc-fin-ddb ()
|
|
(interactive)
|
|
(calc-slow-wrapper
|
|
(calc-enter-result 4 "ddb" (cons 'calcFunc-ddb (calc-top-list-n 4)))))
|
|
|
|
|
|
(defun calc-to-percentage (x)
|
|
(cond ((Math-objectp x)
|
|
(setq x (math-mul x 100))
|
|
(if (Math-num-integerp x)
|
|
(setq x (math-trunc x)))
|
|
(list 'calcFunc-percent x))
|
|
((Math-vectorp x)
|
|
(cons 'vec (mapcar 'calc-to-percentage (cdr x))))
|
|
(t x)))
|
|
|
|
(defun calc-convert-percent ()
|
|
(interactive)
|
|
(calc-slow-wrapper
|
|
(calc-pop-push-record 1 "c%" (calc-to-percentage (calc-top-n 1)))))
|
|
|
|
(defun calc-percent-change ()
|
|
(interactive)
|
|
(calc-slow-wrapper
|
|
(let ((res (calc-normalize (cons 'calcFunc-relch (calc-top-list 2)))))
|
|
(calc-pop-push-record 2 "%ch" (calc-to-percentage res)))))
|
|
|
|
|
|
;;; Financial functions.
|
|
|
|
(defun calcFunc-pv (rate num amount &optional lump)
|
|
(math-check-financial rate num)
|
|
(math-with-extra-prec 2
|
|
(let ((p (math-pow (math-add 1 rate) num)))
|
|
(math-add (math-mul amount
|
|
(math-div (math-sub 1 (math-div 1 p))
|
|
rate))
|
|
(math-div (or lump 0) p)))))
|
|
(put 'calcFunc-pv 'math-expandable t)
|
|
|
|
(defun calcFunc-pvl (rate num amount)
|
|
(calcFunc-pv rate num 0 amount))
|
|
(put 'calcFunc-pvl 'math-expandable t)
|
|
|
|
(defun calcFunc-pvb (rate num amount &optional lump)
|
|
(math-check-financial rate num)
|
|
(math-with-extra-prec 2
|
|
(let* ((p (math-pow (math-add 1 rate) num)))
|
|
(math-add (math-mul amount
|
|
(math-div (math-mul (math-sub 1 (math-div 1 p))
|
|
(math-add 1 rate))
|
|
rate))
|
|
(math-div (or lump 0) p)))))
|
|
(put 'calcFunc-pvb 'math-expandable t)
|
|
|
|
(defun calcFunc-npv (rate &rest flows)
|
|
(math-check-financial rate 1)
|
|
(math-with-extra-prec 2
|
|
(let* ((flat (math-flatten-many-vecs flows))
|
|
(pp (math-add 1 rate))
|
|
(p pp)
|
|
(accum 0))
|
|
(while (setq flat (cdr flat))
|
|
(setq accum (math-add accum (math-div (car flat) p))
|
|
p (math-mul p pp)))
|
|
accum)))
|
|
(put 'calcFunc-npv 'math-expandable t)
|
|
|
|
(defun calcFunc-npvb (rate &rest flows)
|
|
(math-check-financial rate 1)
|
|
(math-with-extra-prec 2
|
|
(let* ((flat (math-flatten-many-vecs flows))
|
|
(pp (math-add 1 rate))
|
|
(p 1)
|
|
(accum 0))
|
|
(while (setq flat (cdr flat))
|
|
(setq accum (math-add accum (math-div (car flat) p))
|
|
p (math-mul p pp)))
|
|
accum)))
|
|
(put 'calcFunc-npvb 'math-expandable t)
|
|
|
|
(defun calcFunc-fv (rate num amount &optional initial)
|
|
(math-check-financial rate num)
|
|
(math-with-extra-prec 2
|
|
(let ((p (math-pow (math-add 1 rate) num)))
|
|
(math-add (math-mul amount
|
|
(math-div (math-sub p 1)
|
|
rate))
|
|
(math-mul (or initial 0) p)))))
|
|
(put 'calcFunc-fv 'math-expandable t)
|
|
|
|
(defun calcFunc-fvl (rate num amount)
|
|
(calcFunc-fv rate num 0 amount))
|
|
(put 'calcFunc-fvl 'math-expandable t)
|
|
|
|
(defun calcFunc-fvb (rate num amount &optional initial)
|
|
(math-check-financial rate num)
|
|
(math-with-extra-prec 2
|
|
(let ((p (math-pow (math-add 1 rate) num)))
|
|
(math-add (math-mul amount
|
|
(math-div (math-mul (math-sub p 1)
|
|
(math-add 1 rate))
|
|
rate))
|
|
(math-mul (or initial 0) p)))))
|
|
(put 'calcFunc-fvb 'math-expandable t)
|
|
|
|
(defun calcFunc-pmt (rate num amount &optional lump)
|
|
(math-check-financial rate num)
|
|
(math-with-extra-prec 2
|
|
(let ((p (math-pow (math-add 1 rate) num)))
|
|
(math-div (math-mul (math-sub amount
|
|
(math-div (or lump 0) p))
|
|
rate)
|
|
(math-sub 1 (math-div 1 p))))))
|
|
(put 'calcFunc-pmt 'math-expandable t)
|
|
|
|
(defun calcFunc-pmtb (rate num amount &optional lump)
|
|
(math-check-financial rate num)
|
|
(math-with-extra-prec 2
|
|
(let ((p (math-pow (math-add 1 rate) num)))
|
|
(math-div (math-mul (math-sub amount (math-div (or lump 0) p)) rate)
|
|
(math-mul (math-sub 1 (math-div 1 p))
|
|
(math-add 1 rate))))))
|
|
(put 'calcFunc-pmtb 'math-expandable t)
|
|
|
|
(defun calcFunc-nper (rate pmt amount &optional lump)
|
|
(math-compute-nper rate pmt amount lump nil))
|
|
(put 'calcFunc-nper 'math-expandable t)
|
|
|
|
(defun calcFunc-nperb (rate pmt amount &optional lump)
|
|
(math-compute-nper rate pmt amount lump 'b))
|
|
(put 'calcFunc-nperb 'math-expandable t)
|
|
|
|
(defun calcFunc-nperl (rate pmt amount)
|
|
(math-compute-nper rate pmt amount nil 'l))
|
|
(put 'calcFunc-nperl 'math-expandable t)
|
|
|
|
(defun math-compute-nper (rate pmt amount lump bflag)
|
|
(and lump (math-zerop lump)
|
|
(setq lump nil))
|
|
(and lump (math-zerop pmt)
|
|
(setq amount lump
|
|
lump nil
|
|
bflag 'l))
|
|
(or (math-objectp rate) (and math-expand-formulas (null lump))
|
|
(math-reject-arg rate 'numberp))
|
|
(and (math-zerop rate)
|
|
(math-reject-arg rate 'nonzerop))
|
|
(or (math-objectp pmt) (and math-expand-formulas (null lump))
|
|
(math-reject-arg pmt 'numberp))
|
|
(or (math-objectp amount) (and math-expand-formulas (null lump))
|
|
(math-reject-arg amount 'numberp))
|
|
(if lump
|
|
(progn
|
|
(or (math-objectp lump)
|
|
(math-reject-arg lump 'numberp))
|
|
(let ((root (math-find-root (list 'calcFunc-eq
|
|
(list (if bflag
|
|
'calcFunc-pvb
|
|
'calcFunc-pv)
|
|
rate
|
|
'(var DUMMY var-DUMMY)
|
|
pmt
|
|
lump)
|
|
amount)
|
|
'(var DUMMY var-DUMMY)
|
|
'(intv 3 0 100)
|
|
t)))
|
|
(if (math-vectorp root)
|
|
(nth 1 root)
|
|
root)))
|
|
(math-with-extra-prec 2
|
|
(let ((temp (if (eq bflag 'l)
|
|
(math-div amount pmt)
|
|
(math-sub 1 (math-div (math-mul amount rate)
|
|
(if bflag
|
|
(math-mul pmt (math-add 1 rate))
|
|
pmt))))))
|
|
(if (or (math-posp temp) math-expand-formulas)
|
|
(math-neg (calcFunc-log temp (math-add 1 rate)))
|
|
(math-reject-arg pmt "*Payment too small to cover interest rate"))))))
|
|
|
|
(defun calcFunc-rate (num pmt amount &optional lump)
|
|
(math-compute-rate num pmt amount lump 'calcFunc-pv))
|
|
|
|
(defun calcFunc-rateb (num pmt amount &optional lump)
|
|
(math-compute-rate num pmt amount lump 'calcFunc-pvb))
|
|
|
|
(defun math-compute-rate (num pmt amount lump func)
|
|
(or (math-objectp num)
|
|
(math-reject-arg num 'numberp))
|
|
(or (math-objectp pmt)
|
|
(math-reject-arg pmt 'numberp))
|
|
(or (math-objectp amount)
|
|
(math-reject-arg amount 'numberp))
|
|
(or (null lump)
|
|
(math-objectp lump)
|
|
(math-reject-arg lump 'numberp))
|
|
(let ((root (math-find-root (list 'calcFunc-eq
|
|
(list func
|
|
'(var DUMMY var-DUMMY)
|
|
num
|
|
pmt
|
|
(or lump 0))
|
|
amount)
|
|
'(var DUMMY var-DUMMY)
|
|
'(intv 3 (float 1 -4) 1)
|
|
t)))
|
|
(if (math-vectorp root)
|
|
(nth 1 root)
|
|
root)))
|
|
|
|
(defun calcFunc-ratel (num pmt amount)
|
|
(or (math-objectp num) math-expand-formulas
|
|
(math-reject-arg num 'numberp))
|
|
(or (math-objectp pmt) math-expand-formulas
|
|
(math-reject-arg pmt 'numberp))
|
|
(or (math-objectp amount) math-expand-formulas
|
|
(math-reject-arg amount 'numberp))
|
|
(math-with-extra-prec 2
|
|
(math-sub (math-pow (math-div pmt amount) (math-div 1 num)) 1)))
|
|
|
|
(defun calcFunc-irr (&rest vecs)
|
|
(math-compute-irr vecs 'calcFunc-npv))
|
|
|
|
(defun calcFunc-irrb (&rest vecs)
|
|
(math-compute-irr vecs 'calcFunc-npvb))
|
|
|
|
(defun math-compute-irr (vecs func)
|
|
(let* ((flat (math-flatten-many-vecs vecs))
|
|
(root (math-find-root (list func
|
|
'(var DUMMY var-DUMMY)
|
|
flat)
|
|
'(var DUMMY var-DUMMY)
|
|
'(intv 3 (float 1 -4) 1)
|
|
t)))
|
|
(if (math-vectorp root)
|
|
(nth 1 root)
|
|
root)))
|
|
|
|
(defun math-check-financial (rate num)
|
|
(or (math-objectp rate) math-expand-formulas
|
|
(math-reject-arg rate 'numberp))
|
|
(and (math-zerop rate)
|
|
(math-reject-arg rate 'nonzerop))
|
|
(or (math-objectp num) math-expand-formulas
|
|
(math-reject-arg num 'numberp)))
|
|
|
|
|
|
(defun calcFunc-sln (cost salvage life &optional period)
|
|
(or (math-realp cost) math-expand-formulas
|
|
(math-reject-arg cost 'realp))
|
|
(or (math-realp salvage) math-expand-formulas
|
|
(math-reject-arg salvage 'realp))
|
|
(or (math-realp life) math-expand-formulas
|
|
(math-reject-arg life 'realp))
|
|
(if (math-zerop life) (math-reject-arg life 'nonzerop))
|
|
(if (and period
|
|
(if (math-num-integerp period)
|
|
(or (Math-lessp life period) (not (math-posp period)))
|
|
(math-reject-arg period 'integerp)))
|
|
0
|
|
(math-div (math-sub cost salvage) life)))
|
|
(put 'calcFunc-sln 'math-expandable t)
|
|
|
|
(defun calcFunc-syd (cost salvage life period)
|
|
(or (math-realp cost) math-expand-formulas
|
|
(math-reject-arg cost 'realp))
|
|
(or (math-realp salvage) math-expand-formulas
|
|
(math-reject-arg salvage 'realp))
|
|
(or (math-realp life) math-expand-formulas
|
|
(math-reject-arg life 'realp))
|
|
(if (math-zerop life) (math-reject-arg life 'nonzerop))
|
|
(or (math-realp period) math-expand-formulas
|
|
(math-reject-arg period 'realp))
|
|
(if (or (Math-lessp life period) (not (math-posp period)))
|
|
0
|
|
(math-div (math-mul (math-sub cost salvage)
|
|
(math-add (math-sub life period) 1))
|
|
(math-div (math-mul life (math-add life 1)) 2))))
|
|
(put 'calcFunc-syd 'math-expandable t)
|
|
|
|
(defun calcFunc-ddb (cost salvage life period)
|
|
(if (math-messy-integerp period) (setq period (math-trunc period)))
|
|
(or (integerp period) (math-reject-arg period 'fixnump))
|
|
(or (math-realp cost) (math-reject-arg cost 'realp))
|
|
(or (math-realp salvage) (math-reject-arg salvage 'realp))
|
|
(or (math-realp life) (math-reject-arg life 'realp))
|
|
(if (math-zerop life) (math-reject-arg life 'nonzerop))
|
|
(if (or (Math-lessp life period) (<= period 0))
|
|
0
|
|
(let ((book cost)
|
|
(res 0))
|
|
(while (>= (setq period (1- period)) 0)
|
|
(setq res (math-div (math-mul book 2) life)
|
|
book (math-sub book res))
|
|
(if (Math-lessp book salvage)
|
|
(setq res (math-add res (math-sub book salvage))
|
|
book salvage)))
|
|
res)))
|
|
|
|
(provide 'calc-fin)
|
|
|
|
;;; arch-tag: 82f30ca8-d02f-4b33-84b4-bb6ecd84597b
|
|
;;; calc-fin.el ends here
|