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),
arg, conj, real, imag (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   largeint 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/matrix ft1/brad ft1/ft2d ft1/autocor vela/vscan vela/strat   CWP          geo2006TimeShiftImagingCondition/zicig geo2006TimeShiftImagingCondition/icomp geo2007StereographicImagingCondition/sigsbee2 geo2007StereographicImagingCondition/gaus1 geo2007StereographicImagingCondition/flat4 geo2008InterferometricImagingCondition/sact1 geo2008InterferometricImagingCondition/circle geo2008NumericWEMVAoperators/saltWEMVA geo2008NumericWEMVAoperators/flatWEMVA jse2006RWEImagingOverturningReflections/sigsbee   DATA          amoco/fdmod marmousi/fdmod pluto/fdmod segsalt/data sigsbee/nfs2B sigsbee/fs2B sigsbee/fdmod2A sigsbee/ptest sigsbee/data2A   GEE          ajt/galilee hlx/helgal iin/invint iin/galilee iin/chevron lal/multiscale lmn/sep77 lsq/antoine mda/misif mda/geostat mda/pefex mda/levint noiz/antoine noiz/burst noiz/rbst noiz/mad pch/tvdecon prc/sep94 prc/seab   GEO384W          hw1/wave hw2/eikonal hw2/raytracing hw3/cmp hw4/dome hw5/sigsbee hw5/hyper hw6/blake   GEO391          hw2/fourier hw3/rotate hw3/pocs hw4/dunes hw6/pattern hw6/seab hw6/rain   GEOSTATS          simulate/rfield simulate/simple spatial_stats/gr_variogram spatial_stats/covariance spatial_stats/correlogram spatial_stats/variogram   GPGN658          fdmod/exercise rtmig/exercise   JSG          atten/pdepth atten/karman1 atten/karmand atten/qcurve atten/spectra atten/enerd attr/vecta attr/attr avo/stat avo/avo diffr/gom diffr/fault group/ell lpf/regr lpf/lpf medianfilter/window nmo3/mcelroy nmo3/azimuthtest pmig/mig pmig/nmo shape/smoo shape/int1 simistack/simple simistack/bei simistack/flat4 strfilter/spray strfilter/hongliu strfilter/bei time2depth/masha2 timelapse/duri timelapse/long1 timelapse/timelapse   RSF          rsf/format rsf/unif3 rsf/sfdots rsf/sfmath rsf/radial rsf/fractal rsf/sfwiggle rsf/sfawefd rsf/sfgraph school/single school/local school/sigsbee school/complex school/channel2 scons/rsf scons/rsfpy su/rsfscales usp/data   SEP          angle/agmig bspl/sei3d bspl/chirp2 bspl/bintest bspl/chirp burg/gtens burg/tension fmeiko/tri fmsec/cvel forwd/chirp2 forwd/chirp helmholtz/wavemovie huygens/marmousi huygens/gauss lineiko/test oc2/cup plane/cube precon/cube precon/seab precon/oned pwd/blast pwd/seab pwd/hector pwd/dune rwe/simp1 seaofgal/gal stack/miginv steer/shot steer/wz25 stoltst/imps stoltst/elfst vc2/beivc velspec/sigvc   SLIM          geo2008NewInsightsPareto/pareto slimUserManual/sfsort slimUserManual/sfthr   TRIP          hpcss/test3 hpcss/test5 hpcss/test1 hpcss/test2 hpcss/test4