## R provides many options

Often, R provides several ways to achieve what you want. Let's set up 50 values from `-pi`

to `+pi`

and graph a sine function. We use the `seq()`

command to set up this sequence. Note that R understands the constant Pi, whose value can be obtained using the following command:

**pi**

The following output is obtained:

**[1] 3.141593**

Now, we create horizontal and vertical axis points for plotting:

x <- seq(-pi, pi, length = 50)y <- sin(x)plot(x, y, pch = 17, cex = 0.7, col = "darkgreen")

Then, we add a line that connects the points:

**lines(x, y, col = "darkgreen") **

Let's take a look at the resulting graph:

Now try the following approach, using 1000 axis values in order to create a smooth-looking graph:

x <- seq(-pi, pi, length = 1000)y <- sin(x)plot(x, y, type = "l")

The output is as follows:

The argument `type = "l"`

produces connecting lines, but here we have so many points that the graph appears smooth. Other options include the argument `type = "o"`

, which produces symbols joined by straight lines, and `type = "p"`

, which produces points.