newTxSubset function

Create TxSubset Object

Processes input to determine ptsSubset and singleton to create a TxSubset object

.newTxSubset(fSet, superset, ...)

## S4 method for signature '`function`,ANY'
.newTxSubset(fSet, superset, ..., data, verify, suppress)

## S4 method for signature '`function`,integer'
.newTxSubset(fSet, superset, txName, data, verify, ...)

## S4 method for signature '`function`,character'
.newTxSubset(fSet, superset, ..., txName, data, verify)