Nothing
rTrapez = function(n, slope) {
#must be between -2 and 2. heights run from 1-slope/2 to 1+slope/2
# F = (1-slope/2)*x + slope*x^2/2
# Finv = -(1-slope/2)+sqrt((1-slope/2)^2 - 4*slope/2*(-F))/(2*slope/2)
if(is.infinite(1/slope)) slope = 1e-7
return((-(1-slope/2)+sqrt((1-slope/2)^2 + 2*slope*runif(n)))/slope)
}
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