Thread: Need Help

For this you can do:

sac> cut 20 40
sac> r file_100
sac> w file_20_40
sac> r file_20_40
sac> mul 4

In this way you generate a new file with samples from 20 to 40 and
then multiply it. by 4.

Sac multiply all sample in memory.

Cheers,

m.


************************************
Milton P. PLASENCIA LINARES

Centro di Ricerche Sismologiche (CRS)
OGS - Istituto Nazionale di Oceanografia e di Geofisica Sperimentale

Borgo Grotta Gigante 42/C
(34010) Sgonico - Trieste - Italia
Tel: +39 040 2140 156 (Udine)
Tel: +39 040 2140 256 (Trieste)
Cel.: +39 331 6481 935

E-mail: mplasencia<at>inogs.it
GPG key: 22FCFFA8

ASAIN (Antarctic Seismographic Argentinean Italian Network)
*********************************

On 9 November 2017 at 05:20, mukesh kumar <kumarmukesh2411<at>gmail.com> wrote:

Dear Milton,

Thanks for your reply. Lets suppose we have 100 sample points in our
waveform sac file and I want to multiply (lets say by four) data points
only from 20 to 40. That means I don't want to multiply the whole dataset
but a portion of dataset. Then how can I do it?

Please reply.

Regards,

On Thu, Nov 9, 2017 at 9:37 AM, Milton Plasencia <mplasencia<at>inogs.it>
wrote:

Mukesh,

Only use the command mul or div in sac
sac> mul constant_value

Please, see the help

sac> help mul

HTH,

M.

************************************
Milton P. PLASENCIA LINARES

Centro di Ricerche Sismologiche (CRS)
OGS - Istituto Nazionale di Oceanografia e di Geofisica Sperimentale

Borgo Grotta Gigante 42/C
https://maps.google.com/?q=Borgo+Grotta+Gigante+42/C(34010)+Sgonico+-+Trieste+-+Italia&entry=gmail&source=g>
(34010) Sgonico - Trieste - Italia
https://maps.google.com/?q=Borgo+Grotta+Gigante+42/C(34010)+Sgonico+-+Trieste+-+Italia&entry=gmail&source=g>
Tel: +39 040 2140 156 (Udine)
Tel: +39 040 2140 256 (Trieste)
Cel.: +39 331 6481 935

E-mail: mplasencia<at>inogs.it
GPG key: 22FCFFA8

ASAIN (Antarctic Seismographic Argentinean Italian Network)
*********************************

On 9 November 2017 at 04:40, mukesh kumar <kumarmukesh2411<at>gmail.com>
wrote:

Hello Sac Users,

I want to multiply or divide a set of data points in a sac file with a
constant. Please suggest me how to do this?

Thank you very much.

Regards,
Mukesh Kumar Das
JRF (Research Scholar)
Department of Applied Geophysics
Indian lnstitute of Technology (Indian School of Mines)
Dhanbad, Jharkhand-826004, India
Mob +918873563108 <+91%2088735%2063108>
+918340601230 <+91%2083406%2001230>


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--
Mukesh Kumar Das
JRF (Research Scholar)
Department of Applied Geophysics
Indian lnstitute of Technology (Indian School of Mines)
Dhanbad, Jharkhand-826004, India
Mob +918873563108 <+91%2088735%2063108>
+918340601230 <+91%2083406%2001230>