Remove unknown fish lengths — remove_unknown

Removes unknown fish lengths. Returns a DBI table.

Usage

remove_unknown_lengths(data, univariate)

data: A DBI table that can be treated like a data.frame, with fish data. See open_fish()
univariate: (logical) Will these data be used for univariate analyses (univariate=TRUE)? Or multi-species analyses (univariate=FALSE)? If univariate, when a Length_NA_flag=="Unknown length" record is found, all records of that taxa from that sample are removed. In effect, this is transforming those records into missing data. If univariate=FALSE, when a Length_NA_flag=="Unknown length" record is found, the entire sample is removed and no 0s are filled in, since accurate community data cannot be confirmed for that sample.

data_known A DBI table with only known lengths