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Use of /APPEND keyword [message #80836]

Fri, 13 July 2012 00:44

titan
Messages: 59
Registered: March 2006

Member

Hi all,
probably I'm doing something stupid but I have this following problem:

I would like to extract from 10 granules of an image (.h5 file) a data set and write a unique file containing all the information from the 10 granules:

FOR i = 0, N_ELEMENTS(granules_vect) - 1 DO BEGIN
longitude_dataset_id=H5D_OPEN(obj_0_group_id, '/'+obj_0_name+'/'+sub_group_0_name+'/Longitude')
longitude=H5D_READ(longitude_dataset_id)
;; Write the LONGITUDE's values in a file

OPENW,long_lun,current_dir+'\'+'longitude.dat', /GET_LUN, /APPEND
WRITEU, long_lun, longitude
FREE_LUN, long_lun
ENDOFOR
H5D_CLOSE, longitude_dataset_id

My problem is that when I run again the code the file .dat starts becoming bigger and bigger like if it is appending the same file to the previous one

could someone help me telling what I'm doing wrong??

thanks a lot

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Use of /APPEND keyword

By: titan on Fri, 13 July 2012 00:44

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