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how to undo 80-column line width maximum in read_ascii? [message #86227]

Sat, 19 October 2013 13:01

Rob Rutten
Messages: 3
Registered: October 2013

Junior Member

I started using read_ascii with a corresponding GUI-produced template_ascii_template('filename'). It works fine but the reading is limited to 80-column line width. I didn't see a width settting as for readf and writef etc. Advise welcome!

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Re: how to undo 80-column line width maximum in read_ascii? [message #86231 is a reply to message #86227]

Sat, 19 October 2013 15:03

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Rob Rutten writes:

> I started using read_ascii with a corresponding GUI-produced template_ascii_template('filename'). It works fine but the reading is limited to 80-column line width. I didn't see a width settting as for readf and writef etc. Advise welcome!

I would say don't use READ_ASCII. I haven't had to use it in 20+ years
of IDL programming. :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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Re: how to undo 80-column line width maximum in read_ascii? [message #86233 is a reply to message #86231]

Sat, 19 October 2013 15:24

Phillip Bitzer
Messages: 223
Registered: June 2006

Senior Member

> I would say don't use READ_ASCII.

You may want to check out ReadCol from the Astro library.

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Re: how to undo 80-column line width maximum in read_ascii? [message #86236 is a reply to message #86233]

Sun, 20 October 2013 06:59

Rob Rutten
Messages: 3
Registered: October 2013

Junior Member

Thanks Philip!

Readcol,pro (I found it in my ssw.lib) is indeed the answer. I had to extend it to 60 columns but that is trivial: just add v-values into the pro declaration (I guess it is not possible to use a double array to fill with columns).

Sofar I used read_struct.pro from the Sloan sdssidl but it has difficulty with erratic string variables.

So indeed I can stop mucking with read_ascii!

This was my first excursion into this forum. Good experience!

Best, Rob

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Re: how to undo 80-column line width maximum in read_ascii? [message #86242 is a reply to message #86227]

Sun, 20 October 2013 17:34

SonicKenking
Messages: 51
Registered: October 2010

Member

On Sunday, October 20, 2013 7:01:15 AM UTC+11, Rob Rutten wrote:
> I started using read_ascii with a corresponding GUI-produced template_ascii_template('filename'). It works fine but the reading is limited to 80-column line width. I didn't see a width settting as for readf and writef etc. Advise welcome!

Interesting but I didn't notice any width limit on my IDL 8.2 and 6.4 (Windows 7) ...

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Re: how to undo 80-column line width maximum in read_ascii? [message #86245 is a reply to message #86227]

Mon, 21 October 2013 06:31

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

Hello,

On 10/19/2013 04:01 PM, Rob Rutten wrote:
> I started using read_ascii with a corresponding GUI-produced
> template_ascii_template('filename'). It works fine but the reading is
> limited to 80-column line width. I didn't see a width settting as
> for readf and writef etc. Advise welcome!

Quite apart from the READ_ASCII issue, widths for ASCII files are set in
the OPEN statement via the WIDTH keyword:

http://www.exelisvis.com/docs/OPEN.html#O_828691053_889787

If not specified the default is, you guessed it, 80 columns.

cheers,

paulv

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Re: how to undo 80-column line width maximum in read_ascii? [message #86246 is a reply to message #86227]

Mon, 21 October 2013 06:58

Rob Rutten
Messages: 3
Registered: October 2013

Junior Member

@ Sonickenking: the 80-character limit sits in the ascii_template.pro GUI to make a reading template.

@ Paul van Delst: yes, I found the width keyword for openr etc but read_ascii.pro and ascii_template.pro want file names, not units.

Anyhow, readcol.pro is indeed a better solution, no GUI clicking needed.

Thanks for all the response! Rob

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