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Re: Help: Countlines on Win 95 version of IDL [message #10541 is a reply to message #10502]

Wed, 17 December 1997 00:00

Michael Werger
Messages: 34
Registered: May 1997

Member

PDW wrote:

> I am converting programs from Unix version of IDL to Windows 95, and have a
> problem with routines using SPAWN and "wc -l" to get the number of lines in
> a file in order to dimension an array. How can this be done on the PC
> version?

Try this:
;+
; Name:
; nlines
; Purpose:
; Return the number of lines in a file
; Usage:
; nl = nlines(file)
; Inputs:
; file = file to scan
; Optional Inputs or Keywords:
; help = flag to print header
; Outputs:
; nl = number of lines in the file.
; Common blocks:
; none
; Procedure:
; Assume ASCII data and read through file.
; Modification history:
; write, 24 Feb 92, F.K.Knight
;-
function nlines,file,help=help
;
; =====>> HELP
;
on_error,2
if keyword_set(help) then begin & doc_library,'nlines' & return,0 & endif
;
; =====>> LOOP THROUGH FILE COUNTING LINES
;
tmp = ' '
nl = 0
on_ioerror,NOASCII
if n_elements(file) eq 0 then file = pickfile()
openr,lun,file,/get_lun
while not eof(lun) do begin
readf,lun,tmp
nl = nl + 1
endwhile
close,lun
free_lun,lun
NOASCII:
return,nl
end

--
Michael Werger ESA ESTEC & Praesepe B.V.
Astrophysics Division mwerger@estec.esa.nl
Postbus 299 http://astro.estec.esa.nl
2200 AG Noordwijk +31 71 565 3783 (Voice)
The Netherlands +31 71 565 4690 (FAX)

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[Message index]

		Help: Countlines on Win 95 version of IDL By: PDW on Tue, 09 December 1997 00:00
		Re: Help: Countlines on Win 95 version of IDL By: mgs on Thu, 18 December 1997 00:00
		Re: Help: Countlines on Win 95 version of IDL By: R. Bauer on Wed, 17 December 1997 00:00
		Re: Help: Countlines on Win 95 version of IDL By: Michael Werger on Wed, 17 December 1997 00:00
		Re: Help: Countlines on Win 95 version of IDL By: David Foster on Thu, 18 December 1997 00:00

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