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Re: Speeding up multiple file reading [message #47251 is a reply to message #47249]

Thu, 02 February 2006 08:42

clivecook59
Messages: 26
Registered: November 2005

Junior Member

The code for reading the binary files was not written by me and reads a
proprietary data format. I don't think that there is much i can do
with that code. However i do perform some operations on the data within
the loop and have been trying to relocate them outside of the loop. An
example of this is,

interp_height = 0 + INDGEN(int)*(16 - 0)/FLOAT(int - 1)

for i =0,count1 -1 do begin

data = read_binary_function(binary_file(i))

ch1x = data.ch1x ;1-D
ch2x = data.ch1x ;1-D
ch3x = data.ch1x ;1-D

correction = ......

sigheight(i,*) = height * correction

ch1(i,*) = interpol(ch1x,sig_height(i,*),interp_height)
ch2(i,*) = interpol(ch2x,sig_height(i,*),interp_height)
ch3(i,*) = interpol(ch3x,sig_height(i,*),interp_height)

endfor

So (not sure if this is explained very well) i am using the interpol
function to grid the data to a regaular grid governed by the
interp_height. I have tried to remove these interpol steps from the
loop but with no luck,

ch1 = interpol(ch1x,sig_height,interp_height)

In this case ch1x,sig_height and interp_height have the same dimensions
but does not produce the same results as in the loop. I use rebin to
produce a new 2-D array with the same dimension for interp_height as
ch1x and sig_height, (transpose(rebin(interp_height,400,100))).

I hope this is clear.

thanks

Clive

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[Message index]

		Re: Speeding up multiple file reading By: JD Smith on Thu, 02 February 2006 08:56
		Re: Speeding up multiple file reading By: David Fanning on Thu, 02 February 2006 08:50
		Re: Speeding up multiple file reading By: clivecook59 on Thu, 02 February 2006 08:42
		Re: Speeding up multiple file reading By: David Fanning on Thu, 02 February 2006 08:15
		Re: Speeding up multiple file reading By: clivecook59 on Thu, 02 February 2006 08:08
		Re: Speeding up multiple file reading By: Maarten[1] on Thu, 02 February 2006 07:48
		Re: Speeding up multiple file reading By: David Fanning on Thu, 02 February 2006 07:44
		Re: Speeding up multiple file reading By: Paul Van Delst[1] on Thu, 02 February 2006 09:53
		Re: Speeding up multiple file reading By: news.qwest.net on Thu, 02 February 2006 09:51

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