Synopsis
		sfmath > out.rsf n#= d#=(1,1,...) o#=(0,0,...) label#= unit#= type= label= unit= output=

Known functions:
cos, sin, tan, acos, asin, atan,
cosh, sinh, tanh, acosh, asinh, atanh,
exp, log, sqrt, abs,
erf, erfc (for float data),
conj (for complex data).

sfmath will work on float or complex data, but all the input and output
files must be of the same data type.

An alternative to sfmath is sfadd, which may be more efficient, but is
less versatile.

Examples:

sfmath x=file1.rsf y=file2.rsf power=file3.rsf output='sin((x+2*y)^power)' > out.rsf
sfmath < file1.rsf tau=file2.rsf output='exp(tau*input)' > out.rsf
sfmath n1=100 type=complex output="exp(I*x1)" > out.rsf

See also: sfheadermath.

Parameters
		float d#=(1,1,...) sampling on #-th axis   string label= data label   string label#= label on #-th axis   int n#= size of #-th axis   float o#=(0,0,...) origin on #-th axis   string output= Mathematical description of the output   string type= output data type [float,complex]   string unit= data unit   string unit#= unit on #-th axis

Used In
		BEI          dpmv/matt dwnc/sigmoid ft1/ft2d ft1/matrix ft1/brad ft1/autocor vela/vscan vela/strat   CWP          geo2006TimeShiftImagingCondition/flat geo2006TimeShiftImagingCondition/zicig geo2006TimeShiftImagingCondition/icomp geo2007StereographicImagingCondition/gaus1 geo2007StereographicImagingCondition/sigsbee2 geo2007StereographicImagingCondition/flat4 gpr2007RWEHighOrderKernels/diving gpr2007RWEHighOrderKernels/marm jse2006RWEImagingOverturningReflections/sigsbee seg2006ConvertedWavesTSIC/cwtsic3   DATA          amoco/fdmod bpait/fdmod marmousi/fdmod marmousi2/fdMod pluto/fdmod sigsbee/nfs2B sigsbee/data2A sigsbee/fdmod2A sigsbee/fs2B sigsbee/wemig sigsbee/pwemig sigsbee/ptest   GEE          ajt/galilee hlx/helgal iin/galilee iin/chevron iin/invint lal/multiscale lmn/sep77 lsq/antoine mda/levint mda/geostat mda/misif mda/pefex noiz/burst noiz/mad noiz/rbst noiz/antoine pch/tvdecon prc/sep94 prc/seab   GEO384W          hw1/simple hw2/eikonal hw3/image hw3/blake hw4/times hw4/waves hw5/sigsbee hw5/hyper hw6/blake   GEOSTATS          atten/random atten/pdepth atten/qcurve atten/vvdata atten/karman atten/karman1 atten/karman2 atten/karmand simulate/rfield simulate/simple spatial_stats/gr_variogram spatial_stats/variogram spatial_stats/covariance spatial_stats/correlogram   JSG          attr/vecta attr/attr diffr/chan3d diffr/gom diffr/fault group/ell pmig/nmo pmig/mig pwc/cmp shape/int1 shape/smoo   RSF          rsf/sfmath rsf/format rsf/radial rsf/sfdots rsf/sfwiggle rsf/fractal rsf/sfgraph scons/rsfpy scons/rsf   SEP          angle/agmig burg/tension burg/gtens fmeiko/tri fmsec/cvel forwd/chirp forwd/chirp2 huygens/gauss huygens/marmousi oc2/cup plane/cube precon/oned precon/seab precon/cube pwd/hector pwd/blast pwd/seab pwd/dune rwe/simp1 seaofgal/gal stack/miginv stoltst/elfst stoltst/imps vc2/elfvc vc2/beivc velspec/sigvc   SLIM          slimUserManual/sfsort slimUserManual/sfthr