calcLumpedPort
==============
```{function}  calcLumpedPort( port, SimDir, f, varargin)
```
Full definition:
```{code-block} matlab
[port] = calcLumpedPort( port, SimDir, f, varargin)
```

Calculate voltages and currents of given lumped port.

The port has to be created by e.g. AddLumpedPort().

input:
- port:       return value of e.g. AddMSLPort()
- SimDir:     directory, where the simulation files are
- f:          frequency vector for DFT

variable input:
- 'RefImpedance':    use a given reference impedance to calculate inc and
                     ref voltages and currents
                     default is given port or calculated line impedance
- 'SwitchDirection': 0/1, switch assumed direction of propagation

output:

- output signals/values in time domain (TD):
  - port.ut.tot:    total voltage (time-domain)
  - port.ut.time:   voltage time vector
  - port.it.tot:    total current (time-domain)
  - port.it.time:   current time vector

- output signals/values in frequency domain (FD):
  - port.f:                 the given frequency factor
  - port.uf.tot/inc/ref:    total, incoming and reflected voltage
  - port.if.tot/inc/ref:    total, incoming and reflected current

example:

    port{1} = calcLumpedPort( port{1}, Sim_Path, f, 'RefImpedance', 50);



-----------------------
(C) 2012 Thorsten Liebig <thorsten.liebig@gmx.de>

See also AddLumpedPort, calcPort