samples: Get Samples of a XenaHub object according to 'by' and 'how'...
In huyuem/UCSCXenaTools: Download and Explore Datasets from UCSC Xena Data Hubs

Description Usage Arguments Value Examples

One is often interested in identifying samples or features present in each data set, or shared by all data sets, or present in any of several data sets. Identifying these samples, including samples in arbitrarily chosen data sets.

samples(
  x,
  i = character(),
  by = c("hosts", "cohorts", "datasets"),
  how = c("each", "any", "all")
)

`x`	a XenaHub object
`i`	default is a empty character, it is used to specify the host, cohort or dataset by `by` option otherwise info will be automatically extracted by code
`by`	a character specify `by` action
`how`	a character specify `how` action

a list include samples

## Not run: 
xe = XenaHub(cohorts = "Cancer Cell Line Encyclopedia (CCLE)")
# samples in each dataset, first host
x = samples(xe, by="datasets", how="each")[[1]]
lengths(x)        # data sets in ccle cohort on first (only) host

## End(Not run)