Me aparece un error con el paquete lattice de R

[Laura-rodriguez-g]

Error in hist.default(as.numeric(x), breaks = breaks, plot = FALSE, include.lowest = include.lowest, :
negative length vectors are not allowed
In addition: Warning messages:
1: In extend.limits(range(as.numeric(x), finite = TRUE), prop = 0.04) :
NAs introduced by coercion
2: In min(x) : no non-missing arguments to min; returning Inf
3: In max(x) : no non-missing arguments to max; returning -Inf
4: In hist(as.numeric(x), breaks = breaks, plot = FALSE, include.lowest = include.lowest, :
NAs introduced by coercion
5: In min(x) : no non-missing arguments to min; returning Inf
6: In max(x) : no non-missing arguments to max; returning -Inf

Alguien sabe que puede ser??