Month: April 2005

RSF program guide: sfheaderattr

April 23, 2005 Documentation No comments

A section on sfheaderattr has been added to the RSF programs guide. Any further additions or corrections would be appreciated.

Wave equation prestack depth migration

April 23, 2005 Examples No comments

Here is Paul Sava’s result on imaging Sigsbee2A synthetic dataset using wave equation migration on a cluster.

Guide to RSF programs: sfget

April 19, 2005 Documentation No comments

The documentation effort continues… A section on sfget has been added to RSF programs guide. Any further additions or corrections would be appreciated.

Guide to RSF programs: sfdisfil

April 10, 2005 Documentation No comments

A section on sfdisfil has been added to RSF programs guide. Any further additions or corrections would be appreciated.

Local documentation

April 6, 2005 FAQ No comments

Is there a place on my own machine where I could point my browser to see the program self-documentation?
Yes, point it to $RSFROOT/doc/index.html. The contents should be identical to those on the selfdoc page.

Format guide

April 2, 2005 Documentation No comments

The Guide to RSF format is completed. Any corrections or additions would be appreciated.

Random numbers

April 1, 2005 Programs No comments

Random numbers in sfnoise and similar programs are now generated by portable code from Makoto Matsumoto and Takuji Nishimura (the “Mersenne Twister” algorithm). It is regarded as one of the most powerful algorithms and is the default random number generator in GSL.

sfmath

April 1, 2005 Programs No comments

sfmath can now work with complex numbers. Try something like
sfmath n1=100 type=complex output=”exp(I*x1)” | sfgraph screenratio=1 | xtpen
You cannot, however, mix float and complex files in the input. Use sfdd, sfrtoc, sfreal, sfimag and sfcmplx to convert between real and complex types.
sfmath n1=100 output=x1 | sfrtoc | sfmath output=”exp(I*input)” | sfgraph screenratio=1 | xtpen