Thread: Merge command fail to work

Yougiang,

Which version of SAC are you using ?

The merge command was rewritten as of version 101.6, recently released
The latest version should be able to merge data similar to what you have.
It will merge all data from memory and specified with the command.

SAC> merge file1.sac file2.sac

This should give you the merged file, provided it meets constraints about
time sampling and amplitude values.

Cheers
Brian

On Jul 26, 2013, at 1:56 PM, Milton Plasencia wrote:

Hi Youqiang,

I recommend you see the "help merge"
to see the merge behavior when find gaps
and overlaps, and perhaps add to command
merge the "verbose" option.

cheers,

Milton

Milton P. Plasencia Linares
mpplasencia<at>gmail.com



On Jul 26, 2013, at 7:45 PM, Youqiang Yu <yyqkc<at>mst.edu> wrote:

Hi, Milton,

Thanks for the advice.

However, when I wrote to a new file, the new file included only
the first file's data. I use "cut" command to remove the overlapping
part and it works. It seems "merge" command can not merge files
whose data has overlapping part.

best,
youqiang

On Fri, Jul 26, 2013 at 11:19 AM, Milton Plasencia <

mpplasencia<at>gmail.com> wrote:

Hi,

Instead write over
use:
write new_name_file

HTH,

Milton

Milton P. Plasencia Linares
mpplasencia<at>gmail.com



On Jul 26, 2013, at 5:47 PM, Youqiang Yu <yyqkc<at>mst.edu> wrote:

To whom it may concern,

I have a question on the "merge" command. I have
two SAC files from the same station. The reason why
I want to merge them together is these two dataset have
some common data. So I want to merge them together
as one dataset. In other words, the ending time of the first
data file is after the beginning time of the second data file.

what I do is as follows:

read 1.sac
merge 2.sac
write over
quit

If successfully, 1.sac should include these two data. However,
when I read 1.sac again, nothing happens to this file. In addition,
there is no errors when I run the above merging command. Please
help me on this issue. Thanks.

best,
youqiang

--
Youqiang Yu
Geology & Geophysics Program
Department of Geological Science & Engineering
Missouri University of Science and Technology
Rolla, Mo, 65409
Email: yyqkc<at>mst.com
573.201.9437
相信自己，创造梦想
_______________________________________________
sac-help mailing list
sac-help<at>iris.washington.edu
http://www.iris.washington.edu/mailman/listinfo/sac-help

--
Youqiang Yu
Geology & Geophysics Program
Department of Geological Science & Engineering
Missouri University of Science and Technology
Rolla, Mo, 65409
Email: yyqkc<at>mst.com
573.201.9437
相信自己，创造梦想

_______________________________________________
sac-help mailing list
sac-help<at>iris.washington.edu
http://www.iris.washington.edu/mailman/listinfo/sac-help