Alla Bulashevska wrote:
Dear R users,
i try to use function dmvnorm(x, mean, sigma, log=FALSE)
from R package mvtnorm to calculate the probability of x
under the multivariate normal distribution with mean equal
to mean and covariance matrix sigma.
I become the following
Error in solve.default(cov, ...) :
system is computationally singular: reciprocal condition
number = 1.81093e-19
Probably your sigma is almost singular and can't be inverted in the
calculation of the Mahalanobis distance.
Uwe Ligges
What could be the reason of it?
Thank you in Advance,
Alla.
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