Datasets from parse_phyloseq not subsettable

[HSapers]

Hello - really like the heatmap visualizations. I'm trying to follow the tutorial with my own data. I have a phlyoseq object that I read into metacoder using parse_phyloseq. I can see the datasets in the taxmap object: otu_table, tax_data, sample_data, phy_tree.

I can create tax_abund:

obj$data$tax_abund <- calc_taxon_abund(obj, "otu_table")

However, I can't seem to access sample_data from the taxmap object:

obj$data$type_abund <- calc_group_mean(obj, "tax_data",
                                       cols = sample_data$sample_id,
                                       groups = sample_data$groups)

print(obj$data$type_abund)

Error in sample_data$sample_id : object of type 'closure' is not subsettable

trying metacode::sample_data results in:
Error: 'sample_data' is not an exported object from 'namespace:metacoder

sample_data seems to default to the phlyoseq method, but I can't seem to reference it from the taxmap obj.

thanks

edit

solved with the following:

obj$data$type_abund <- calc_group_mean(obj, "tax_abund",
                                       cols = obj$data$sample_data$sample_id,
                                       groups = obj$data$sample_data$groups)

print(obj$data$type_abund)