[R] Error when using cobs library

[jacinthe at gmx.de]

Dear R-Users,

I have problems with the cobs library. When doing the cobs example, I get the folling error message:

example(cobs)

cobs> x <- seq(-1, 3, , 150)

cobs> y <- (f.true <- pnorm(2 * x)) + rnorm(150)/10

cobs> con <- rbind(c(1, min(x), 0), c(-1, max(x), 1), c(0, 
    0, 0.5))

cobs> Rbs <- cobs(x, y, constraint = "increase", pointwise = con)
qbsks2():
 Performing general knot selection ...
Error in as.matrix.csr(new("matrix.coo", ra = c(z1$design), ia = i1, ja = j1,  : 
        unable to find a non-generic version of function "as.matrix.csr"


Any suggestions how to fix this problem?

Thank you for your help.

Jaci

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