Synopsis
		sffold < in.rsf > out.rsf verbose=1 o1= o2= o3= n1= n2= n3= d1= d2= d3= label1= label2= label3=

This is a general 3D histogram program implemented to create foldplot or
stacking charts on a 3d project from trace headers. Axis1, 2 and 3
define the bins for the output fold map. These are usually
(offset,xline,iline), but you might want to compute some other
histogram. This can be done by selecting other segy headers using
label1, 2 and 3.

See also fold= option in sfbin for creating 2D histograms.

EXAMPLES:

To make a stacking chart movie showing fold(xline,offset) for each
iline from a 3D segyfile:

sfsegyread tfile=tteapot.rsf hfile=teapot.asc bfile=teapot.bin \
tape=npr3_field.sgy > teapot.rsf

# read the tfile, which contains the segy trace headers
< teapot_hdr.rsf sffold verbose=1 \
o1=0 n1=96 d1=200 label1=offset \
o2=1 n2=188 d2=1 label2=xline \
o3=1 n3=345 d3=1 label3=iline \
>foldplot.rsf
| sfpen

# transpose this data to plot foldmaps for each offset window:

< foldplot.rsf sftransp plane=13 \
| sftransp plane=12 \
| sfgrey title=foldplot_off gainpanel=all \
| sfpen

Parameters
		float d1= Delta label1 - usually delta offset   float d2= Delta label2 - usually delta xline   float d3= Delta label3 - usually delta iline   string label1= header for axis1 - usually offset   string label2= header for axis2 - usually xline or cdp   string label3= header for axis3 - usually iline   int n1= Number label1 - usually number offset   int n2= Number label2 - usually number xline   int n3= Number label3 - usually number iline   float o1= Minimum label1 - usually min offset   float o2= Minimum label2 - usually min xline   float o3= Minimum label3 - usually min iline   int verbose=1 0 terse, 1 informative, 2 chatty, 3 debug

Used In
		DATA          alaska/foldplot bpstatics94/firstlook chevron2014/geom p-cable/geom seam-phase1-2d/cvs seam-phase1-2d/fetch seam-phase1-2d/ntg seam-phase1-2d/vscan teapotdome/geom viking/firstlook