# irts-methods

##### Methods for Irregular Time-Series Objects

Methods for irregular time-series objects.

- Keywords
- ts

##### Usage

```
# S3 method for irts
lines(x, type = "l", …)
# S3 method for irts
plot(x, type = "l", plot.type = c("multiple", "single"),
xlab = "Time", ylab = NULL, main = NULL, ylim = NULL,
oma = c(6, 0, 5, 0), …)
# S3 method for irts
points(x, type = "p", …)
# S3 method for irts
print(x, format = "%Y-%m-%d %H:%M:%S", tz = "GMT",
usetz = TRUE, format.value = NULL, …)
# S3 method for irts
time(x, …)
# S3 method for irts
value(x, …)
# S3 method for irts
[(x, i, j, …)
```

##### Arguments

- x
an object of class

`"irts"`

; usually, a result of a call to`irts`

.- type, plot.type, xlab, ylab, main, ylim, oma
graphical arguments, see

`plot`

,`points`

,`lines`

,`par`

, and`plot.ts`

.- format, tz, usetz
formatting related arguments, see

`format.POSIXct`

.- format.value
a string which specifies the formatting of the values when printing an irregular time-series object.

`format.value`

is passed unchanged as argument`format`

to the function`formatC`

.- i, j
indices specifying the parts to extract from an irregular time-series object.

- …
further arguments passed to or from other methods: for

`lines`

passed to`lines`

; for`plot`

passed to`plot`

,`plot.default`

, and`mtext`

; for`points`

passed to`points`

; for`print`

passed to`formatC`

; for`time`

,`value`

, and`[.irts`

unused.

##### Details

`plot`

is the method for plotting irregular time-series objects.

`points`

and `lines`

are the methods for drawing a sequence
of points as given by an irregular time-series object and joining the
corresponding points with line segments, respectively.

`print`

is the method for printing irregular time-series objects.

`time`

and `value`

are the methods for extracting the
sequence of times and the sequence of values of an irregular
time-series object.

`[.irts`

is the method for extracting parts of irregular
time-series objects.

##### Value

For `time`

an object of class `"POSIXct"`

representing the
sequence of times. For `value`

a vector or matrix representing
the sequence of values.

For `[.irts`

an object of class `"irts"`

representing the
extracted part.

For `plot`

, `points`

, `lines`

, and `print`

the
irregular time-series object.

##### See Also

##### Examples

```
# NOT RUN {
n <- 10
t <- cumsum(rexp(n, rate = 0.1))
v <- rnorm(n)
x <- irts(t, v)
x
time(x)
value(x)
plot(x)
points(x)
t <- cumsum(c(t[1], rexp(n-1, rate = 0.2)))
v <- rnorm(n, sd = 0.1)
x <- irts(t, v)
lines(x, col = "red")
points(x, col = "red")
# Multivariate
t <- cumsum(rexp(n, rate = 0.1))
u <- rnorm(n)
v <- rnorm(n)
x <- irts(t, cbind(u, v))
x
x[,1]
x[1:3,]
x[1:3,1]
plot(x)
# }
```

*Documentation reproduced from package tseries, version 0.10-46, License: GPL-2*