plot.spec {stats} | R Documentation |

## Plotting Spectral Densities

### Description

Plotting method for objects of class `"spec"`

. For multivariate
time series it plots the marginal spectra of the series or pairs plots
of the coherency and phase of the cross-spectra.

### Usage

```
## S3 method for class 'spec'
plot(x, add = FALSE, ci = 0.95, log = c("yes", "dB", "no"),
xlab = "frequency", ylab = NULL, type = "l",
ci.col = "blue", ci.lty = 3,
main = NULL, sub = NULL,
plot.type = c("marginal", "coherency", "phase"),
...)
plot.spec.phase(x, ci = 0.95,
xlab = "frequency", ylab = "phase",
ylim = c(-pi, pi), type = "l",
main = NULL, ci.col = "blue", ci.lty = 3, ...)
plot.spec.coherency(x, ci = 0.95,
xlab = "frequency",
ylab = "squared coherency",
ylim = c(0, 1), type = "l",
main = NULL, ci.col = "blue", ci.lty = 3, ...)
```

### Arguments

`x` |
an object of class |

`add` |
logical. If |

`ci` |
coverage probability for confidence interval. Plotting of
the confidence bar/limits is omitted unless |

`log` |
If |

`xlab` |
the x label of the plot. |

`ylab` |
the y label of the plot. If missing a suitable label will be constructed. |

`type` |
the type of plot to be drawn, defaults to lines. |

`ci.col` |
colour for plotting confidence bar or confidence intervals for coherency and phase. |

`ci.lty` |
line type for confidence intervals for coherency and phase. |

`main` |
overall title for the plot. If missing, a suitable title is constructed. |

`sub` |
a subtitle for the plot. Only used for |

`plot.type` |
For multivariate time series, the type of plot required. Only the first character is needed. |

`ylim` , `...` |
Graphical parameters. |

### See Also

*stats*version 4.4.1 Index]