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

Arguments which are not treated as variables in mathematical expressions:
datapath=, type=, out=

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/autocor ft1/brad ft1/ft2d ft1/matrix trimo/all vela/strat vela/vscan   CHEN          test/fpca test/wavmod test/xtime   CWP          geo2006TimeShiftImagingCondition/flat geo2006TimeShiftImagingCondition/icomp geo2006TimeShiftImagingCondition/zicig geo2007StereographicImagingCondition/flat4 geo2007StereographicImagingCondition/gaus1 geo2007StereographicImagingCondition/sigsbee2 geo2008InterferometricImagingCondition/circle geo2008InterferometricImagingCondition/sact1 geo2008IsotropicAngleDomainElasticRTM/marm2allA geo2008IsotropicAngleDomainElasticRTM/marm2oneA geo2008NumericWEMVAoperators/flatWEMVA geo2008NumericWEMVAoperators/saltWEMVA geo2009TTIModeSeparation/fold geo2009TTIModeSeparation/marmousi2 geo2009TTIModeSeparation/operator geo2009TTIModeSeparation/tti3 geo2009TTIModeSeparation/vti3 geo2009VTIModeSeparation/aniopsize geo2009VTIModeSeparation/oporder geo2009VTIModeSeparation/separate2 geo2009VTIModeSeparation/separate3 geo2009VTIModeSeparation/separate5 geo2009VTIModeSeparation/sigsbee geo2011WideAzimuthAngleDecomposition/flatEICangle geo2011WideAzimuthAngleDecomposition/seam357 jse2006RWEImagingOverturningReflections/sigsbee pept2011MicroearthquakeMonitoring/saf1 pept2011MicroearthquakeMonitoring/saf2 pept2011MicroearthquakeMonitoring/saf3   DATA          amoco/fdmod marmousi/fdmod marmousi2/fdMod nankai/shots pluto/fdmod segsalt/data sigsbee/data2A sigsbee/fdmod2A sigsbee/fs2B sigsbee/nfs2B sigsbee/ptest sigsbee/pwemig sigsbee/wemig   GEE          ajt/galilee hlx/helgal iin/chevron iin/galilee iin/invint lal/multiscale lmn/sep77 lsq/antoine lsq/lomask lsq/puck lsq/vesuvio mda/geostat mda/levint mda/misif mda/pefex noiz/antoine noiz/burst noiz/mad noiz/rbst noiz/softclip pch/tvdecon prc/seab prc/sep94   GEO384W          hw1/wave hw2/cmp hw3/synth hw4/sigsbee hw4/synth hw5/hyper hw5/hyper2 hw5/sigsbee hw6/blake   GEO391          hw2/sorting hw3/fourier hw3/pocs hw4/rain hw4/rotate hw5/seabeam hw6/dunes   GEOSTATS          simulate/rfield simulate/simple spatial_stats/correlogram spatial_stats/covariance spatial_stats/gr_variogram spatial_stats/variogram   GPGN658          fdmod/exercise rtmig/exercise   HANSUNG          cgg/syn   JSG          apefint/alias apefint/misscurv apefint/missing apefint/ray apefint/sean atten/enerd atten/karman1 atten/karmand atten/pdepth atten/qcurve atten/spectra attr/attr attr/vecta avo/avo avo/stat crs/dome2 diffr/chan3d diffr/fault diffr/gom ffd/anisotropic ffd/bptti ffd/cos ffd/ffd flat/comaz flat/flat flat/flatelf fpwd/const fpwd/sigmoid fpwd/teapot group/ell hyper/amarm lfd/aniso lfd/bptti lfd/dispersion1 lfd/oned lfd/twod lowrank/aniso lowrank/bptti lowrank/fio lowrank/impres lowrank/threed lpf/lpf lpf/regr ltft/groll ltft/timefreq ltft/vecta medianfilter/window nmo3/azimuthtest nmo3/mcelroy oc3/bei oc3/fault oc3/french oc3/frenchint pmig/mig pmig/nmo reversible/delta reversible/nscnmo seislet/diplet seislet/lena seislet/plane seislet/seis seislet/sin2 shape/int1 shape/smoo simistack/bei simistack/flat4 simistack/simple stackadcig/flat stackadcig/sigsbee stackadcig/simple strfilter/bei strfilter/hongliu strfilter/spray time2depth/masha2 timefreq/chev timefreq/lowf timefreq/syn timelapse/duri timelapse/long1 timelapse/timelapse vc3/fracs vc3/threedim   MILANO          taupvel/cmp taupvel/synth   RSF          bash/mpi bash/plot bash/sample1 bash/sample2 reprobook/exam2 reprobook/exam3 reprobook/exam4 reprobook/exam5 rsf/format rsf/fractal rsf/plot rsf/radial rsf/sfawefd rsf/sfderiv rsf/sfdots rsf/sfenvelope rsf/sfgraph rsf/sfmath rsf/sfnoise rsf/sfwiggle rsf/unif3 rsf/wedge school/clip_test school/complex school/marm school/ray school/sigsbee school/single school/tapprox school2009/channel2 school2009/local school2012/plot school2012/sample1 school2012/sample2 scons/rsf scons/rsfpy su/rsflab10 su/rsflab15 su/rsflab16 su/rsflab5 su/rsflab8 su/rsfscales usp/data   SEP          angle/agmig bspl/bintest bspl/chirp bspl/chirp2 bspl/sei3d burg/gtens burg/tension fat/migration fmeiko/tri fmsec/cvel forwd/chirp forwd/chirp2 fractal/random helft/mult helft/spike helmholtz/wavemovie huygens/gauss huygens/marmousi lineiko/test oc2/cup plane/cube precon/cube precon/oned precon/seab pwd/blast pwd/dune pwd/hector pwd/seab pyramid/model pyramid/pyramid rwe/simp1 seaofgal/gal stack/miginv steer/shot steer/wz25 stoltst/elfst stoltst/imps texture/fft vc2/beivc vc2/elfvc vc2/sigvc vc2/spec velspec/sigvc waverays/gauss   SLIM          geo2008NewInsightsPareto/pareto slimUserManual/sfsort slimUserManual/sfthr   SWAG          anisogath/synth eikds/marm2 eikds/smvel itime/oz2 itime/oz6 itime/syn tau/arte tau/hess tau/lens tau/linear tau/marm tau/vertical waveds/fdmod waveds/fdmodnoSS waveds/svmod   TRIP          hpcss/test1 hpcss/test2 hpcss/test3 hpcss/test4 hpcss/test5 iwave/data   TUTORIAL          authors/data