Hello,
I'm only interested in the 2019 samples in my metadata file, so I used qiime feature-table filter-features
command.
The command worked well but I found that the number of the ASVs decreased a lot.
rarefied_table.qza
this file contains 33616 ASVs and 699 samples
rarefied_table-2019.qza
this file contains 16600 ASVs, and 211 samples. This is true that I only have 211 samples in 2019.
In my opinion, this command just filters the asv table based on --p-where '[Year]="2019"'
, why does the number of ASV reduce this much? Any help would be appreciated.
(qiime2-2023.5) busihan@SihandeMacBook-Pro core-metrics-results-nonphylo-renamed-unique-samples-genus % qiime feature-table filter-samples \
--i-table rarefied_table.qza \
--m-metadata-file 2024Mar14_Mapping_file_740.tsv \
--p-where '[Year]="2019"' \
--o-filtered-table rarefied_table-2019.qza
Saved FeatureTable[Frequency] to: rarefied_table-2019.qza
2024Mar14_Mapping_file_740.tsv (65.3 KB)
rarefied_table-2019.qza (713.6 KB)
rarefied_table.qza (1.6 MB)