MATLAB Programming

Regular Expressions
Matches ' rain', 'Spain', ' main', and'plain'.
Returning Strings Rather than Indices. Here is the same example, this
time specifying the command qualifier 'match'. Inthiscase,regexp returns
the text of the matching strings rather than the starting index:
regexp(str, '..ain', 'match')
ans =
' rain' 'Spain' ' main' 'plain'
Selected Characters — [c1c2c3]
Use [c 1
c 2
c 3
] in an expression to match selected characters r, p, orm followed
by 'ain'. Specify two qualifiers this time, 'match' and 'start', alongwith
an output argument for each, mat and idx. This returns the matching strings
and the starting indices of those strings:
[mat idx] = regexp(str, '[rpm]ain', 'match', 'start')
mat =
'rain' 'pain' 'main'
idx =
5 14 25
Range of Characters — [c1 - c2]
Use [c 1
-c 2
] in an expression to find words that begin with a letter in the
range of A through Z:
[mat idx] = regexp(str, '[A-Z]\w*', 'match', 'start')
mat =
'The' 'Spain'
idx =
1 13
3-35