[R] Splitting lines in R script

[Steven Yen]

I have a line containing summation of four components.

# This works OK:
  p<-pbivnorm(bb,dd,tau)+pbivnorm(aa,cc,tau)-
    -pbivnorm(aa,dd,tau)-pbivnorm(bb,cc,tau)

# This produces unpredicted results without warning:
  p<-pbivnorm(bb,dd,tau)+pbivnorm(aa,cc,tau)
    -pbivnorm(aa,dd,tau)-pbivnorm(bb,cc,tau)

Is there a general rule of thumb for line breaks? Thanks you.

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