add(plot,frequency,data)
adds data to an existing Smith chart based on multiple data sets containing
frequencies corresponding to columns of data matrix.
Smith chart handle, specified as a function handle. If the handle of the
Smith chart is not retained during creation, it is obtained by using the
command p = smithplot('gco').
Data Types: double
Input data, specified as a complex vector or complex matrix.
For a matrix D, the columns of D are
independent data sets. For N-by-D
arrays, dimensions 2 and greater are independent data sets.