 # Lession - #913 R Line

## Line Graphs

A line graph has a line that connects all the points in a diagram.

To create a line, use the

``plot(>``
``type``
parameter with a value of
``"l"``
:

### Example

plot(1:10, type="l">

Result: ## Line Color

The line color is black by default. To change the color, use the

``col``
parameter:

### Example

plot(1:10, type="l", col="blue">

Result: ## Line Width

To change the width of the line, use the

``lwd``
parameter (
``1``
is default, while
``0.5``
means 50% smaller, and
``2``
means 100% larger>
:

### Example

plot(1:10, type="l", lwd=2>

Result: ## Line Styles

The line is solid by default. Use the

``lty``
parameter with a value from 0 to 6 to specify the line format.

For example,

``lty=3``
will display a dotted line instead of a solid line:

### Example

plot(1:10, type="l", lwd=5, lty=3>

Result: Available parameter values for

``lty``
:

``````0 removes the line
1 displays a solid line
2 displays a dashed line
3 displays a dotted line
4 displays a "dot dashed" line
5 displays a "long dashed" line
6 displays a "two dashed" line``````

## Multiple Lines

To display more than one line in a graph, use the

``plot(>``
function together with the
``lines(>``
function:

### Example

line1 <- c(1,2,3,4,5,10>

line2 <- c(2,5,7,8,9,10>

plot(line1, type = "l", col = "blue">

lines(line2, type="l", col = "red">

Result: 