The $partialdiff sub X$ root mean sq anom [ NOAA NCEP CPC Merged_Analysis monthly v0312 ver2 prcp_est ] data are available as a columnar table,
i.e. as multiple columns of data, intended primarily to be read. However,
if you have other intentions for this table, or simply do not like the default choices, you may want to choose from the columnar tables with options.