37 lines
727 B
R
37 lines
727 B
R
RadiusOfGyration <-
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function(mat,ITRVL){
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mat=matrix(mat,ncol=7)
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IDskip=which(mat[,1]==4)
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if(length(IDskip)>0){
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mat=matrix(mat[-IDskip,],ncol=7)
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}
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N=nrow(mat)
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w_v=rep(0,N)
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x_v=rep(0,N)
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y_v=rep(0,N)
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for(i in 1:N){
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if(mat[i,1]==4){
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next
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}
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if(mat[i,1]==3){
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x_v[i]=mat[i,2]
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y_v[i]=mat[i,3]
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w_v[i]=ITRVL
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}
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if(mat[i,1]==1){
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x_v[i]=mean(mat[i,c(2,5)])
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y_v[i]=mean(mat[i,c(3,6)])
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w_v[i]=mat[i,7]-mat[i,4]
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}
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if(mat[i,1]==2){
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x_v[i]=mat[i,2]
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y_v[i]=mat[i,3]
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w_v[i]=mat[i,7]-mat[i,4]
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}
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}
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sumw_v=sum(w_v)
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xavg=sum(w_v*x_v)/sumw_v
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yavg=sum(w_v*y_v)/sumw_v
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return(sqrt(sum(((x_v-xavg)^2+(y_v-yavg)^2)*w_v)/sumw_v))
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}
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