# 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()` function and add the `type` parameter with a value of `"l"`:

### Example

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

Result:

Try it Yourself »

## 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:

Try it Yourself »

## 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:

Try it Yourself »

## 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:

Try it Yourself »

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:

Try it Yourself »