| read data from several files [message #37213] |
Tue, 25 November 2003 21:50 |
Dennis Lamenti
Messages: 4
Registered: November 2003
|
Junior Member |
|
|
Hi,
New to using IDL and I am plotting and comparing magnitudes of stars over
several days.
For each image there is a photometry file created with data for stars
located.
Can anyone suggest how to have IDL read from several files and extract only
data necessary and then plot this data that it extracts?
For examply, in four seperate files (text files) each file has 8 columns and
300 lines. In the first file, the star is in the 67th line and the
magnitudes are in the 6th and 7th column (the columns will always be the
same). In the next file the star (same star) is in the 169th line...the star
could be in any line, but I want to match up the magnitudes of 6th and 7th
columns (columns for that data are always in 6th and 7th column). I want to
have IDL grab only data for that star in each of the four files, do some
calculation with it and plot it and then go to another star and doing the
same thing. The star location in the file is random, but the columns of that
info remain the same.
I assume that I will have to search for string match for the star names in
each file and then do 'readcol', but that is all I know.
Any help would be appreciated.
Thanks,
Dennis Lamenti
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
