Dear all,
Can someone explain the correct way to handle this warning message?
data.ppca <-phyl.pca(tree, data.mean)
data.ppca
Warnings:
1: In sqrt(V[i, i] * obj$Eval[j, j]) : NaNs were generated
2: In sqrt(V[i, i] * obj$Eval[j, j]) : NaNs were generated
3: In sqrt(V[i, i] * obj$Eval[j, j]) : NaNs were generated
4: In sqrt(V[i, i] * obj$Eval[j, j]) : NaNs were generated
5: In sqrt(V[i, i] * obj$Eval[j, j]) : NaNs were generated
I understand that this happened because of the negative values in the dataset
after the Z-score transformation, but I don't know if there is a way to solve
it.
Thank you in advance,
Jovana
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