Scilab-Branch-6.1-GIT
- Ajuda do Scilab
- Cadeias de Caracteres (Strings)
- ascii
- asciimat
- blanks
- char
- convstr
- emptystr
- evstr
- grep
- isalphanum
- isascii
- isdigit
- isletter
- isnum
- justify
- length
- part
- prettyprint
- regexp
- sci2exp
- strcat
- strchr
- strcmp
- strcspn
- strindex
- string
- stripblanks
- strncpy
- strrchr
- strrev
- strsplit
- strspn
- strstr
- strsubst
- strtod
- strtok
- tokenpos
- tokens
Please note that the recommended version of Scilab is 2025.0.0. This page might be outdated.
See the recommended documentation of this function
strtod
parse and convert literal numbers STRings TO Decimal numbers
Syntax
[d, tails] = strtod(str) [d, tails] = strtod(str, decimalseparator)
Arguments
- str
single component, vector, or matrix of strings.
- decimalseparator
the decimal separator chosen: "." (by default) or ",".
- d
scalar, vector, or matrix of decimal numbers.
- tails
a string or matrix of strings: remaining parts of
str
after the numerical heads (if any).
Description
[d, tails] = strtod(str)
parses each string of
str
and tries to interpret its content as a decimal
number:
- If it succeeds, at least for the heading part of
str(i)
, the corresponding decimal number is returned ind(i)
. If any, the trailing part ofstr(i)
is ignored and returned intails(i)
; otherwise,tails(i)
returns "". - Otherwise,
d(i)
returns%nan
, andtails(i)
is the wholestr(i)
.
|
Examples
s = ["123.556 abc " ".543" "#58B" "0x73 " "%inf" "-1.47e-71" "67,432.57" " 23,5" "-,57" "Inf" ] [num, trail] = strtod(s); num, "/"+trail+"/" // With "," as decimal separator: [num, trail] = strtod(s, ","); num, "/"+trail+"/"
See also
- evstr — avaliação de expressões
- isnum — testa se um string representa um número
- isdigit — checa se os caracteres de um string são números entre 0 e 9
- bin2dec — conversão de representação binária para inteira
- oct2dec — conversão de octais para inteiros
- hex2dec — conversão de representação hexadecimal para inteiros
History
Versão | Descrição |
5.5.0 | Option decimalseparator introduced (SEP 97). |
5.4.1 | If str does not contain any numerical value,
d now returns Nan
instead of 0 . |
Report an issue | ||
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