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Date: Tue, 23 Oct 2012 02:29:37 -0700 (PDT)
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Subject: Re: XDR format files
From: sid <gunvicsi...@gmail.com>
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On Monday, October 22, 2012 2:49:58 PM UTC+5:30, Helder wrote:
> On Monday, October 22, 2012 10:50:09 AM UTC+2, sid wrote:
>=20
> > Hi all,
>=20
> >=20
>=20
> >       Please let me know how to open a xdr format file.
>=20
> >=20
>=20
> > I dont know the data type and size of the file. So I couldnt use the RE=
ADU command.
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> >=20
>=20
> > Please do help out in this regard.
>=20
> >=20
>=20
> > thanking you in advance.
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> >=20
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> > sid
>=20
>=20
>=20
> Hi,
>=20
> as far as I could see, xrd file are ascii files for x-ray diffraction wit=
h 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 heade=
r lines start with a "[" and the data lines are composed of four numbers: h=
kl (Miller indices) and intensity. After you define the Line variable as a =
string (line=3D''), you may read each line with the command:
>=20
> readf, Lun, Line
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> Then check for the "[" character. If present, then it's header, otherwise=
 not.
>=20
>=20
>=20
> 2) The other option is to cound the number of header lines and the number=
 of lines in the file by using the FILE_LINES(FileName) function. Then you =
can create an array or structure with the correct dimensions. Something lik=
e:
>=20
> Reflex =3D REPLICATE({h:0,k:0,l:0,Intensity:0.0},FILE_LINES(XRD_FileName)=
-nHeaderLines-1)
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> And then you fill in the values.
>=20
>=20
>=20
> Once you read a line, you can use the STRSPLIT(Line, /EXTRACT) function t=
o get an array of four elements where the first three are Miller indices an=
d the fourth is an intensity.
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>=20
>=20
> I hope this helps.
>=20
>=20
>=20
> Cheers,
>=20
> Helder

Hello sir,
         The file which I am having is XDR(external data representation) fi=
les. Please let me know how to open this kid of file.
thank you
sid