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Date: Tue, 23 Oct 2012 06:01:07 -0700 (PDT)
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Subject: Re: XDR format files
From: wlandsman <wlands...@gmail.com>
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You can open it using the /XDR keyword to OPENU

But XDR merely specifies the byte order (big endian but using a minimum of =
4 bytes for every data type).    It doesn't tell you anything about how the=
 file is organized, or what its contents are.      You need to know (or tel=
l us) more about the file to read it.        --Wayne


On Tuesday, October 23, 2012 5:29:37 AM UTC-4, sid wrote:
> On Monday, October 22, 2012 2:49:58 PM UTC+5:30, Helder wrote:
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> > On Monday, October 22, 2012 10:50:09 AM UTC+2, sid wrote:
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> > > Hi all,
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> > >=20
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> > >       Please let me know how to open a xdr format file.
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> > >=20
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> > > I dont know the data type and size of the file. So I couldnt use the =
READU command.
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> > > Please do help out in this regard.
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> > > thanking you in advance.
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> > > sid
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> > Hi,
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> > as far as I could see, xrd file are ascii files for x-ray diffraction w=
ith a header and the last line contains the "0 0 0" reflection.
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> > Then you have at least two options:
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> > 1) you loop until you find the end line or the end of the file. The hea=
der lines start with a "[" and the data lines are composed of four numbers:=
 hkl (Miller indices) and intensity. After you define the Line variable as =
a string (line=3D''), you may read each line with the command:
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> > readf, Lun, Line
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> > Then check for the "[" character. If present, then it's header, otherwi=
se not.
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> > 2) The other option is to cound the number of header lines and the numb=
er of lines in the file by using the FILE_LINES(FileName) function. Then yo=
u can create an array or structure with the correct dimensions. Something l=
ike:
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> > Reflex =3D REPLICATE({h:0,k:0,l:0,Intensity:0.0},FILE_LINES(XRD_FileNam=
e)-nHeaderLines-1)
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> > And then you fill in the values.
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> > Once you read a line, you can use the STRSPLIT(Line, /EXTRACT) function=
 to get an array of four elements where the first three are Miller indices =
and the fourth is an intensity.
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> > I hope this helps.
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> > Cheers,
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> > Helder
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> Hello sir,
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>          The file which I am having is XDR(external data representation) =
files. Please let me know how to open this kid of file.
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> thank you
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> sid