| Re: XDR format files [message #81838 is a reply to message #81756] |
Wed, 24 October 2012 01:39   |
Helder Marchetto
Messages: 520
Registered: November 2011
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Senior Member |
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On Tuesday, October 23, 2012 11:29:37 AM UTC+2, 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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>>>
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>>> Please let me know how to open a xdr format file.
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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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>>>
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>>> thanking you in advance.
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>>>
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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 with 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 header 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=''), 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, otherwise not.
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>> 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 like:
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>> Reflex = 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
Ups, I got that one completely wrong... My browser auto-corrects the inputs depending on my usual research field queries!
Anyway, if you want to switch to xrd files, they seem easier to read :-)
Cheers,
h
h
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