# plot.tvspc

From TSSS v1.2.3
by Masami Saga

##### Plot Evolutionary Power Spectra Obtained by Time Varying AR Model

Plot evolutionary power spectra obtained by time varying AR model returned
by `tvspc`

.

- Keywords
- ts

##### Usage

```
# S3 method for tvspc
plot(x, theta = 0, phi = 15, expand = 1, col = "lightblue",
ticktype= "detail", …)
```

##### Arguments

- x
an object of class

`"tvspc"`

.- theta, phi, expand, col, ticktype
graphical parameters in perspective plot

`persp`

.- …
further graphical parameters may also be supplied as arguments.

##### Examples

```
# NOT RUN {
# seismic data
data(MYE1F)
z <- tvar(MYE1F, trend.order = 2, ar.order = 8, span = 20,
outlier = c(630, 1026), tau2.ini = 6.6e-06, delta = 1.0e-06)
spec <- tvspc(z$arcoef, z$sigma2)
plot(spec, theta = 30, phi = 40, expand = 0.5)
# }
```

*Documentation reproduced from package TSSS, version 1.2.3, License: GPL (>= 2)*

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