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Re: How to read a file in zip or gz format usin [message #2648 is a reply to message #2507]

Thu, 04 August 1994 21:42

oet
Messages: 28
Registered: February 1993

Junior Member

>
> I am asking for help to read a file in zip or gz format using IDL. At the
> moment, I have a huge data file in ASCII format about 10 Mbytes, it thus
> takes a long time to read in all the data. I wonder it may take less time if
> the data is compressed using either zip or gzip methods. But how can I read
> such compressed file? Any advice over there is highly appreciated.
>
>

No problem, I had a similiar problem some time ago, here is the data read
procedure I used,

Thomas Oettli

FUNCTION GET_RC, f

; Return reference coordinates

coords = { x_ref:fltarr(305,269), y_ref:fltarr(305,269) }
spawn, ['gunzip','-c',f], UNIT=lun, /NOSHELL

readu, lun, coords
free_lun, lun
return, coords

END

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[Message index]

		How to read a file in zip or gz format using IDL? By: j.tan on Wed, 03 August 1994 08:17
		Re: How to read a file in zip or gz format using IDL? By: tai on Wed, 03 August 1994 14:03
		Re: How to read a file in zip or gz format using IDL? By: 8015 on Thu, 04 August 1994 08:34
		Re: How to read a file in zip or gz format usin By: chase on Fri, 05 August 1994 08:33
		Re: How to read a file in zip or gz format using IDL? By: j.tan on Fri, 05 August 1994 05:33
		Re: How to read a file in zip or gz format usin By: oet on Thu, 04 August 1994 21:42

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