Synopsis
		sfheadermath < in.rsf > out.rsf segy=y nkey=-1 memsize=sf_memsize() key= output=

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

Known functions for int data: sign, abs

See also sfmath.

An addition operation can be performed by sfadd.

Parameters
		string key= key to replace   int memsize=sf_memsize() Max amount of RAM (in Mb) to be used   int nkey=-1 number of key to replace   string output= Describes the output in a mathematical notation.   bool segy=y [y/n] if SEGY headers

Used In
		DATA          seam-phase1-2d/vscan sigsbee/data2A sigsbee/fs2B sigsbee/nfs2B sigsbee/ptest sigsbee/pwemig sigsbee/wemig teapotdome/canoren teapotdome/geom teapotdome/tahsubset teapotdome/teamodel viking/basicm8r viking/firstlook   GALLERY          bp/model hessvti/model   GEO384S          hw1/data hw2/groundroll hw2/land3d hw3/dmo hw3/nmo hw3/nmo3d hw4/teapot hw5/pradon hw6/gazdag hw6/kirchhoff hw6/rtm   M8R          format/las   RSF          su/rsflab11 su/rsflab14 su/rsflab15 su/rsflab16 tutorials/petro1 tutorials/petro2 tutorials/rockphysic tutorials/well-tie   SWAG          tau/iso   TCCS          avo/avo2 deblend/fairfield-initmfnew merge/pcable merge/pcable2 nmo3/mcelroy optapert/rightSigsbee ortho/orthofair ovc/nankai probdif/nankai scan3/realdata sparse/vg svmf/fairfield t2dweak/alaska varipick/newviking welllogs/logs wetm/nankaizone   TONGJI          decoupledpropagation/hessvti.2nd.decoupled qpwave/hessvti   ZJU          diffrlrra/nankai_new