matlab-字符数组与字符比较、字符分类

>> x=['abc','defgh']

x =

abcdefgh

>> x={'abc','defgh'}

x =

??? 'abc'??? 'defgh'

>> y={'111','222'}

y =

??? '111'??? '222'

>> strcat(x,y)

ans =

??? 'abc111'??? 'defgh222'

?

?

?

>> x='aaa'

x =

aaa

>> y='a11'

y =

a11

>> x == y

ans =

???? 1???? 0???? 0

>>

?

?

>> strncmp('aaa','aa11',1)

ans =

???? 1

>> strncmp('aaa','aa11',2)

ans =

???? 1

?

?

>> strcmp('aaa','11')

ans =

???? 0

?

>> strncmp('aaa','aa11',3)

ans =

???? 0

?

?

字符分类:

是否为字母

>> isletter('sssaa11')

ans =

???? 1???? 1???? 1???? 1???? 1???? 0???? 0

是否为空格

>> isspace('s? ssaa11')

ans =

???? 0???? 1???? 1???? 0???? 0???? 0???? 0???? 0???? 0

是否为指定类型

>> isstrprop('s? ssaa11','alpha')

ans =

???? 1???? 0???? 0???? 1???? 1???? 1???? 1???? 0???? 0

>> isstrprop('s? ssaa11','alphanum')

ans =

???? 1???? 0???? 0???? 1???? 1???? 1???? 1???? 1???? 1

?

?Argument C must be a string from the following set:
??? 'alpha'???? : classify S as in the alphabetic letter range
??? 'alphanum'? : classify S as in the alphanumeric range
??? 'cntrl'???? : classify S as in the range of control characters, char(0:20).
??? 'digit'???? : classify S as in the range of numeric digits
??? 'graphic'?? : classify S as in the range of graphic characters. These are
??????????????? all values that represent characters NOT of the set
??????????????? {unassigned, space, line separator, paragraph separator, control
??????????????? characters, Unicode format control characters, private
??????????????? user-defined characters, Unicode surrogate characters, Unicode
??????????????? other characters}.
??? 'lower'???? : classify S as in the range of lowercase letters
??? 'print'???? : classify S as in the range of graphic characters, plus
??????????????? char(32).
??? 'punct'???? : classify S as in the range of punctuation characters
??? 'wspace'??? : classify S as in the range of whitespace characters; this
??????????????? range includes the ANSI C definition of whitespace,
??????????????? {' ','\t','\n','\r','\v','\f'}, in addition to a number of
??????????????? other Unicode characters.
??? 'upper'???? : classify S as in the range of uppercase letters
??? 'xdigit'??? : classify S as in the range of valid hexadecimal digits
?
??? EXAMPLES
?
??? B = isstrprop('abc123efg','alpha') returns B? => [1 1 1 0 0 0 1 1 1]
??? B = isstrprop('abc123efg','digit') returns B? => [0 0 0 1 1 1 0 0 0]
??? B = isstrprop('abc123efg','xdigit') returns B => [1 1 1 1 1 1 1 1 0]