Synopsis
		sfmath > out.rsf nostdin=n 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, sign (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   bool nostdin=n [y/n] y - ignore stdin   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   CUP          rna2d/real rna2d/shot rna2d/simple rna3d/shot rna3d/sin   CWP          geo2006TimeShiftImagingCondition/flat geo2006TimeShiftImagingCondition/icomp geo2006TimeShiftImagingCondition/zicig geo2007StereographicImagingCondition/flat4 geo2007StereographicImagingCondition/gaus1 geo2007StereographicImagingCondition/sigsbee2 geo2008InterferometricImagingCondition/circle geo2008InterferometricImagingCondition/sact1 geo2008InterferometricImagingCondition/sigs2 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          alaska/line31-81-m8r amoco/fdmod