Mercurial > hg > octave-nkf
changeset 5187:e58bbd2b9c94
[project @ 2005-03-03 07:20:32 by jwe]
author | jwe |
---|---|
date | Thu, 03 Mar 2005 07:20:32 +0000 |
parents | 64fcf6e776be |
children | fd90c6df7d52 |
files | scripts/strings/str2double.m |
diffstat | 1 files changed, 56 insertions(+), 49 deletions(-) [+] |
line wrap: on
line diff
--- a/scripts/strings/str2double.m +++ b/scripts/strings/str2double.m @@ -1,4 +1,4 @@ -## Copyright (C) 2004 by Alois Schloegl <a.schloegl@ieee.org> +## Copyright (C) 2004 by Alois Schloegl ## ## This file is part of Octave. ## @@ -17,61 +17,68 @@ ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA ## 02111-1307, USA. -## STR2DOUBLE converts strings into numeric values -## [NUM, STATUS,STRARRAY] = STR2DOUBLE(STR) +## -*- texinfo -*- +## @deftypefn {Function File} {[@var{num}, @var{status}, @var{strarray}] =} str2double (@var{str}, @var{cdelim}, @var{rdelim}, @var{ddelim}) +## Convert strings into numeric values. ## -## STR2DOUBLE can replace STR2NUM, but avoids the insecure use of EVAL -## on unknown data [1]. +## @code{str2double} can replace @code{str2num}, but avoids the use of +## @code{eval} on unknown data. ## -## STR can be the form '[+-]d[.]dd[[eE][+-]ddd]' -## d can be any of digit from 0 to 9, [] indicate optional elements -## NUM is the corresponding numeric value. -## if the conversion fails, status is -1 and NUM is NaN. -## STATUS = 0: conversion was successful -## STATUS = -1: couldnot convert string into numeric value -## STRARRAY is a cell array of strings. +## @var{str} can be the form @samp{[+-]d[.]dd[[eE][+-]ddd]} in which +## @samp{d} can be any of digit from 0 to 9, and @samp{[]} indicate +## optional elements. +## +## @var{num} is the corresponding numeric value. If the conversion +## fails, status is -1 and @var{num} is NaN. ## -## Elements which are not defined or not valid return NaN and -## the STATUS becomes -1 -## STR can be also a character array or a cell array of strings. -## Then, NUM and STATUS return matrices of appropriate size. +## @var{status} is 0 if the conversion was successful and -1 otherwise. +## +## @var{strarray} is a cell array of strings. +## +## Elements which are not defined or not valid return NaN and the +## @var{status} becomes -1. ## -## STR can also contain multiple elements. -## default row-delimiters are: -## NEWLINE, CARRIAGE RETURN and SEMICOLON i.e. ASCII 10, 13 and 59. -## default column-delimiters are: -## TAB, SPACE and COMMA i.e. ASCII 9, 32, and 44. -## default decimal delimiter is '.' char(46), sometimes (e.g in -## Tab-delimited text files generated by Excel export in Europe) -## might used ',' as decimal delimiter. +## If @var{str} is a character array or a cell array of strings, then +## @var{num} and @var{status} return matrices of appropriate size. +## +## @var{str} can also contain multiple elements separated by row and +## column delimiters (@var{cdelim} and @var{rdelim}). +## +## The parameters @var{cdelim}, @var{rdelim}, and @var{ddelim} are +## optional column, row, and decimal delimiters. ## -## [NUM, STATUS] = STR2DOUBLE(STR,CDELIM,RDELIM,DDELIM) -## CDELIM .. [OPTIONAL] user-specified column delimiter -## RDELIM .. [OPTIONAL] user-specified row delimiter -## DDELIM .. [OPTIONAL] user-specified decimal delimiter -## CDELIM, RDELIM and DDELIM must contain only -## NULL, NEWLINE, CARRIAGE RETURN, SEMICOLON, COLON, SLASH, TAB, SPACE, COMMA, or ()[]{} -## i.e. ASCII 0,9,10,11,12,13,14,32,33,34,40,41,44,47,58,59,91,93,123,124,125 +## The default row-delimiters are newline, carriage return and semicolon +## (ASCII 10, 13 and 59). The default column-delimiters are tab, space +## and comma (ASCII 9, 32, and 44). The default decimal delimiter is +## @samp{.} (ASCII 46). ## -## Examples: -## str2double('-.1e-5') -## ans = -1.0000e-006 +## @var{cdelim}, @var{rdelim}, and @var{ddelim} must contain only nul, +## newline, carriage return, semicolon, colon, slash, tab, space, comma, +## or @samp{()[]@{@}} (ASCII 0, 9, 10, 11, 12, 13, 14, 32, 33, 34, 40, +## 41, 44, 47, 58, 59, 91, 93, 123, 124, 125). +## +## Examples: +## +## @example +## str2double ("-.1e-5") +## @result{} -1.0000e-006 ## -## str2double('.314e1, 44.44e-1, .7; -1e+1') -## ans = -## 3.1400 4.4440 0.7000 -## -10.0000 NaN NaN +## str2double (".314e1, 44.44e-1, .7; -1e+1") +## @result{} +## 3.1400 4.4440 0.7000 +## -10.0000 NaN NaN ## -## line ='200,300,400,NaN,-inf,cd,yes,no,999,maybe,NaN'; -## [x,status]=str2double(line) -## x = -## 200 300 400 NaN -Inf NaN NaN NaN 999 NaN NaN -## status = -## 0 0 0 0 0 -1 -1 -1 0 -1 0 -## -## Reference(s): -## [1] David A. Wheeler, Secure Programming for Linux and Unix HOWTO. -## http://en.tldp.org/HOWTO/Secure-Programs-HOWTO/ +## line = "200,300,400,NaN,-inf,cd,yes,no,999,maybe,NaN"; +## [x, status] = str2double (line) +## x = +## 200 300 400 NaN -Inf NaN NaN NaN 999 NaN NaN +## status = +## 0 0 0 0 0 -1 -1 -1 0 -1 0 +## @end example +## @end deftypefn + +## Author: Alois Schloegl <a.schloegl@ieee.org> +## Adapted-by: jwe function [num, status, strarray] = str2double (s, cdelim, rdelim, ddelim) @@ -258,7 +265,7 @@ if (ddelim == ".") t(t==ddelim) = "."; endif - [v,tmp2,c] = sscanf(char(t), "%f %s", "C"); + [v, tmp2, c] = sscanf(char(t), "%f %s", "C"); ## [v,c,em,ni] = sscanf(char(t),"%f %s"); ## c = c * (ni>length(t)); if (c == 1),