;+ ;FUNCTION: wc_4d(dat,ENERGY=en,ERANGE=er,EBINS=ebins,ANGLE=an,ARANGE=ar,BINS=bins,MASS=ms,m_int=mi,q=q,mincnt=mincnt) ;INPUT: ; dat: structure, 4d data structure filled by themis routines mvn_sta_c6.pro, mvn_sta_d0.pro, etc. ;KEYWORDS ; ENERGY: fltarr(2), optional, min,max energy range for integration ; ERANGE: fltarr(2), optional, min,max energy bin numbers for integration ; EBINS: bytarr(na), optional, energy bins array for integration ; 0,1=exclude,include, ; na = dat.nenergy ; ANGLE: fltarr(2,2), optional, angle range for integration ; theta min,max (0,0),(1,0) -90<theta<90 ; phi min,max (0,1),(1,1) 0<phi<360 ; ARANGE: fltarr(2), optional, min,max angle bin numbers for integration ; BINS: bytarr(nb), optional, angle bins array for integration ; 0,1=exclude,include, ; nb = dat.ntheta ; BINS: bytarr(na,nb), optional, energy/angle bins array for integration ; 0,1=exclude,include ;PURPOSE: ; Returns the anisotropy ;NOTES: ; Function normally called by "get_4dt" to ; generate time series data for "tplot.pro". ; ;CREATED BY: ; J.McFadden 14-02-26 ;LAST MODIFICATION: ;- function wc_4d,dat2,ENERGY=en,ERANGE=er,EBINS=ebins,ANGLE=an,ARANGE=ar,BINS=bins,MASS=ms,m_int=mi,q=q,mincnt=mincnt iso = 0 if dat2.valid eq 0 then begin print,'Invalid Data' return, iso endif if dat2.nbins eq 1 then return,iso dat = conv_units(dat2,"counts") ; initially use counts data = dat.data energy = dat.energy theta = dat.theta/!radeg phi = dat.phi/!radeg if keyword_set(en) then begin ind = where(energy lt en[0] or energy gt en[1],count) if count ne 0 then data[ind]=0. endif if keyword_set(ms) then begin ind = where(dat.mass_arr lt ms[0] or dat.mass_arr gt ms[1],count) if count ne 0 then data[ind]=0. endif if keyword_set(mincnt) then if total(data) lt mincnt then return,0 dat.data=data dat = conv_units(dat2,"eflux") ; Use energy flux data=dat.data if dat.nmass gt 1 then an_arr = total(total(data,3),1) else an_arr = total(data,1) max_an = max(an_arr,ind) iso = 1. - total(an_arr)/(an_arr[ind]*dat.nbins+1.e-20) return,iso ; anisotropy end