otu1 - asnumericotu1Error list object cannot be coerced to type double

This error message suggests that the object "otu1" is a list and cannot be converted directly to a numeric vector using the "as.numeric()" function.

To convert a list to a numeric vector, you need to first extract the relevant elements from the list and then apply the "as.numeric()" function to the extracted elements.

For example, if "otu1" is a list of numeric values, you could extract the first element and convert it to a numeric value as follows:

otu1 <- list(1, 2, 3, 4)
otu1_numeric <- as.numeric(otu1[[1]]) # extract first element and convert to numeric

In this case, the resulting value of "otu1_numeric" would be 1, which is the first element of the original list