Displaying 1 result from an estimated 1 matches for "numofcurves".
2005 Oct 07
1
Matrix calculations in R--erroneous?
Does anyone know how -log(x) can equal 743 but -log(x+0)=Inf? That's what
the following stream of calculations suggest:
Browse[2]> -log ( 1e-323+yMat2 - yMat1 * logitShape(matrix(parsList$Xs,
nrow = numXs, ncol=numOfCurves), matrix(means, nrow = numXs,
ncol=numOfCurves, byrow=TRUE), matrix(sigmas, nrow = numXs,
ncol=numOfCurves, byrow=TRUE)) )[5,9]
[1] Inf
Yet:
Browse[2]> logitShape(matrix(parsList$Xs, nrow = numXs, ncol=numOfCurves),
matrix(means, nrow = numXs, ncol=numOfCurves, byrow=TRUE), matrix(sigmas,
nr...