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Re: reading ascii in array merging with strsplit [message #52475]

Thu, 08 February 2007 01:39

Andrea Pitacco
Messages: 3
Registered: March 2004

Junior Member

On 6 Feb 2007 05:46:39 -0800, "leatherback"
<jelle.ferwerda@rmit.edu.au> wrote:

> Hi All,
>
> I use a template to read_ascii data of the following format:
>
> D9 6-2-1998 17:00 37,59 0,59 36,5
>
> Which returns a structure of arrays.
>
> However, the date (6-2-1998) and time (17:00) I need to convert to
> julian time, which takes
>
> JULDAY(Month, Day, Year, Hour, Minute, Second)
>
> I -could- for each entry in the list do a strsplit:
>
> daysarr = STRTRIM(strsplit(data.date[ThisLine], '-', /extract), 2)
> timearr = STRTRIM(strsplit(data.time[ThisLine], ':', /extract), 2)

Dear Jelle,
if you are heading to Julian time and your date&time timestamp is a
single string tag of an array of structures, you may conveniently read
and transform the whole vector using just using the native ReadS
instruction and an appropriate FORMAT.

As the online help "synthetically" writes, ReadS can act on a vector.
What is essential, is to provide it with a properly dimensioned
double-precision destination array:

jtime = DblArr(N_Elements(data))
ReadS, data.timestamp, jtime, FORMAT =
'(C(CYI,X,CMOI,X,CDI,X,CHI,X,CMI,X,CSI))'

Regards, Andrea

Andrea Pitacco
Dept. of Environmental Agronomy, University of Padova, Italy

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[Message index]

		Re: reading ascii in array merging with strsplit By: Andrea Pitacco on Thu, 08 February 2007 01:39
		Re: reading ascii in array merging with strsplit By: leatherback on Tue, 06 February 2007 08:34
		Re: reading ascii in array merging with strsplit By: Brian Larsen on Tue, 06 February 2007 08:02
		Re: reading ascii in array merging with strsplit By: leatherback on Tue, 06 February 2007 06:51
		Re: reading ascii in array merging with strsplit By: Brian Larsen on Tue, 06 February 2007 06:46

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