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Artificial Intelligence - R Programming Advanced

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Lesson Description


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(>
function and add the
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: