OCTAVE HODO2PLOT

This is an octave program that reads two *.seg files for plotting a hodogram. The files are checked to insure that the sample intervals and other parameters match.
 Start an octave session and type
	hodo2plot

This hodo2plot.m file is different from hodoplot.m in that the components
to be plotted are from two different *.seg files, rather than a single 
*.seg file.  An example would be a Rayleigh wave problem
where the vertical and radial components reside in different files.

1. prompt for which file is X-axis, which is Y-axis.
The code will check that the same number of traces and time sampling are
used for both files.
2. GUI, choose a trace to plot.  
3. GUI, choose scale factor or just default.
4. GUI, choose a Tmax value, say .05 seconds.
5. GUI, click continue
6. GUI, choose a new Tmax value, say .10 seconds
7. GUI, click continue
What you are doing is plotting the particle motion for increasing
time steps.
KEY POINT:
* There will always be a sign convention. Upward velocity produces a negative voltage on vertical
phone.  Do a tap test for your equipment.

Figure 10: OCTAVE HODO2PLOT: Plotting particle motion on the Radial and Vertical components of a Rayleigh wave problem in which the channels reside in different *.seg files. If components are in a single file, use HODOPLOT program instead (see 6.0.9).
\includegraphics[scale=0.7]{Figure10.pdf}