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Re: reading binary files [message #54501 is a reply to message #49280]

Tue, 19 June 2007 07:16

Vince Oliver
Messages: 8
Registered: June 2007

Junior Member

we are maybe on the good way. I wrote this

OpenR, lun, data, /Get_Lun, /F77_UNFORMATTED

specnr=2
nlen=7323
n=2*nlen
specoff=(n+1)*specnr*4l ; this is letter L not number 1
spectra = Assoc(lun, Fltarr(n),specoff)

aSpectra = spectra[0]

for i = 0l, 10, 2 do begin
print, aSpectra[i], aSpectra[i+1]
endfor

the output is:

1.00407e-021 8.20937e-041
8.20937e-041 91.0000
2.39148e-009 94.0000
3.81471e-009 96.0000
5.10172e-009 98.0000
2.44573e-008 100.000

Should be like

91. 2.39147746E-09
94. 3.81470944E-09
96. 5.10172171E-09
....

> From where these 3 numbers are on the begining? I can put

for i = 3l, 10, 2 do begin
print, aSpectra[i], aSpectra[i+1]
endfor

but the point is that I miss 3 last numbers at the end because of
these numbers.

On Jun 19, 3:06 pm, Wox <nom...@hotmail.com> wrote:
>> I have no experience with this, but what happens if you use (e.g. for
>> 3rd spectrum):
>
>> specnr=2
>> nlen=7323
>> n=2*nlen+1
>> specoff=n*specnr*4
>> spectra = Assoc(lun, Fltarr(n),specoff)
>
> Sorry, this:
>
> specnr=2
> nlen=7323
> n=2*nlen
> specoff=(n+1)*specnr*4
> spectra = Assoc(lun, Fltarr(n),specoff)
>
> I assume here that the data is: DWORD|fltarr(n)|DWORD|fltarr(n)...

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[Message index]

		Reading binary files made by Python By: Liberum on Mon, 10 July 2006 02:45
		Re: reading binary files By: Vince Oliver on Tue, 19 June 2007 09:10
		Re: reading binary files By: Paul Van Delst[1] on Tue, 19 June 2007 08:28
		Re: reading binary files By: Vince Oliver on Tue, 19 June 2007 08:06
		Re: reading binary files By: Paul Van Delst[1] on Tue, 19 June 2007 07:47
		Re: reading binary files By: Vince Oliver on Tue, 19 June 2007 07:16
		Re: reading binary files By: Wox on Tue, 19 June 2007 06:06
		Re: reading binary files By: Wox on Tue, 19 June 2007 06:00

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