I have lines of text I am reading in and am trying to match the line
with regex but I dont know if my pattern is correct.
The line looks like this, but multi cols, tab
delimited. 0 38.159481
0.01 38.159481
0.02 38.312172
0.03 38.159481
0.04 38.159481
0.05 38.312172
0.06 38.312172
0.07 38.159481
0.08 38.464859
0.09 38.159481
0.1 38.159481
I just
want the 0 and 0.1 and so forth on down.
This is
my pattern Im using:
[code
language="vb"]Dim mystreamreader As StreamReader Dim myStreamWriter As StreamWriter Dim fi As New FileInfo(myoldfile) Dim pattern As String = "^\d*(.[1-9]) |\.[1-9]\t.+" myStreamWriter = File.CreateText(myfile) mystreamreader = File.OpenText(myoldfile) Dim myRegEx As New System.Text.RegularExpressions.Regex(pattern)
Dim myInputString As String = mystreamreader.ReadLine
Do Until mystreamreader Is Nothing myInputString = mystreamreader.ReadLine()
If myRegEx.IsMatch(myInputString) Then myStreamWriter.WriteLine(myInputString) End If Loop[/code]
I am reading the
lines ok, but its not matching what I want.
Any clues
Thanks.
(Moderator:
Thread moved to this forum for better
responses)
I came across your post and just know you have been waiting for all this time for an answer. <g>
The code example suggests that all lines that match will be outputed...yet you mentioned you only want one column...
The below regex will look for two columns and place them into named groups if such functionality is needed. Get group 0 or referenced by "Col1" for the data. I like the groups because it makes the regex easier to understand by sight. I had the whitespace placed into a non capture group, which helps with anchoring but does not cloud final data output.
