# multLines

##### Plot Multiple Lines

Plots multiple lines based on a vector `x`

and a matrix `y`

,
draws thin vertical lines connecting limits represented by columns of
`y`

beyond the first. It is assumed that either (1) the second
and third columns of `y`

represent lower and upper confidence
limits, or that (2) there is an even number of columns beyond the
first and these represent ascending quantiles that are symmetrically
arranged around 0.5. If `options(grType='plotly')`

is in effect,
uses `plotly`

graphics instead of `grid`

or base graphics.
For `plotly`

you may want to set the list of possible colors,
etc. using `pobj=plot_ly(colors=...)`

. `lwd,lty,lwd.vert`

are ignored under `plotly`

.

- Keywords
- hplot

##### Usage

```
multLines(x, y, pos = c('left', 'right'), col='gray',
lwd=1, lty=1, lwd.vert = .85, lty.vert = 1,
alpha = 0.4, grid = FALSE,
pobj=plotly::plot_ly(), xlim, name=colnames(y)[1], legendgroup=name,
showlegend=TRUE, ...)
```

##### Arguments

- x
a numeric vector

- y
a numeric matrix with number of rows equal to the number of

`x`

elements- pos
when

`pos='left'`

the vertical lines are drawn, right to left, to the left of the point`(x, y[,1)`

. Otherwise lines are drawn left to right to the right of the point.- col
a color used to connect

`(x, y[,1])`

pairs. The same color but with transparency given by the`alpha`

argument is used to draw the vertical lines- lwd
line width for main lines

- lty
line types for main lines

- lwd.vert
line width for vertical lines

- lty.vert
line type for vertical lines

- alpha
transparency

- grid
set to

`TRUE`

when using`grid`

/`lattice`

- pobj
an already started

`plotly`

object to add to- xlim
global x-axis limits (required if using

`plotly`

)- name
trace name if using

`plotly`

- legendgroup
legend group name if using

`plotly`

- showlegend
whether or not to show traces in legend, if using

`plotly`

- …
passed to

`add_lines`

or`add_segments`

if using`plotly`

##### Examples

```
# NOT RUN {
x <- 1:4
y <- cbind(x, x-3, x-2, x-1, x+1, x+2, x+3)
plot(NA, NA, xlim=c(1,4), ylim=c(-2, 7))
multLines(x, y, col='blue')
multLines(x, y, col='red', pos='right')
# }
```

*Documentation reproduced from package Hmisc, version 4.3-0, License: GPL (>= 2)*