| Is there an easy way to write and read (large) structure? [message #63589] |
Thu, 13 November 2008 21:30 |
mystea
Messages: 16
Registered: October 2007
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Junior Member |
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Hi all,
I am trying to write my data (which is a structure array) into a ascii
file and to retrieve it later on.
A most naive way to write to a file is as follows:
;***
openw,lun,'mydata.dat',/get_lun
printf,lun,data
free_lun,lun
;***
To read it, simply create a structure array of the same type:
;*****************************
record={properties,DOB:0.0,M:0.0,sec:0.0,xpos:0.0,ypos:0.0,z pos:0.0,$
P:0.0,A:0.0,Q:0.0,Tc:0.0,Tm:0.0,clA:0.0,ms:0.0,status:'unbor n'}
data=replicate(record,10000)
openr,lun,'mydata.dat',/get_lun
readf,lun,data
free_lun,lun
;*****************************
This method actually works very well for short structures where each
array element
can be recorded in one line.
However, the data structure I have in hand is very long, and the file
'mydata.dat' looks
like:
{ 110.0015 1.09355 7.99650 2489.13
1962.11 1361.55
0.00000 12.00000 53.00000 0.00000
0.00000 0.00000
0.00000 unborn}{ 0.114715 0.803090 17.3017
660.172
3556.35 1409.37 0.00000 0.05000 0.00000
0.10000
0.00000 0.00000 0.00000 unborn}......
(10000 structure instances, 23000+ lines)
so when I type in:
readf,lun,data
IDL returns
% READF: Input conversion error. Unit: 100, File: mydata.dat
% Execution halted at: $MAIN$
;******
Is there any good way to get around this?
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