Extract one or more psth objects to make a new mpsth list

Extract one or more psth objects to make a new mpsth list

# S3 method for mpsth
[(x, i, ...)

Arguments

x	mpsth objec to subset
i	indices to use in subsetting
...	additional arguments (currently ignored)

See also

Other mpsth: as.mpsth, as.ts.mpsth