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344 3. Reference Manual
3.9.3 NicholPlot
NicholPlot[func, {var, f
, f
}]
displays a Nichol plot of the transfer function func[var] as
the independent variable var is swept from f
to f
NicholPlot[{func
, func
, † † † }, {var, f
, f
}]
displays the transfer functions func
, func
, † † †
simultaneously in a Nichol plot
Command structure of NicholPlot.
NicholPlot displays one or several transfer functions in a Nichol plot. A Nichol plot is similar to a
Nyquist plot but shows magnitude (in dB) vs. phase with the axis origin at the point dB ∘ .
Note that NicholPlot has attribute HoldFirst.
NicholPlot supports additional patterns for displaying numerical data generated with the functions
ACAnalysis (Section 3.7.3), NoiseAnalysis (Section 3.7.4), or ReadSimulationData (Section 3.10.3):
NicholPlot[traces, {var, f
, f
}]
displays a list of AC traces computed with e.g.
ACAnalysis in a Nichol plot
NicholPlot[traces, expr, {var, f
, f
}]
displays the value of an expression in terms of AC traces
NicholPlot[traces, {expr
, expr
, † † † }, {var, f
, f
}]
displays the values of several expressions
Displaying numerical data with NicholPlot.
You can customize the appearance of Nichol plots with the following options. In addition,
NicholPlot inherits many options from ListPlot and Legend. Both the options which are specific
to NicholPlot as well as the inherited options can be set with SetOptions[NicholPlot, opts].
option name
default value
FrequencyScaling Exponential whether to distribute sampling points
exponentially or linearly along the
frequency axis
PhaseDisplay Degrees the unit for phase values
ShowLegend True whether to display trace names
TraceNames Automatic the trace names displayed in the plot legend
Options for NicholPlot.