The **lwd** is one of the graphical parameters of the plot() function. To create a chart from a dataset in R, use the plot() function. In R base plot functions, the option **lty** is used to define a **line type**, and **lwd** is used to define a **line width**.

**lwd in R**

The **lwd** in R stands for line width. While creating a plot in R, the **lwd** defines the width of a line. It is a line width relative to the default (default=1). If you pass **lwd** **= 2**, then it is twice as wide.

The syntax of the plot() function is following.

`plot( x, y, pch = 1, cex = 1, col = 1, bg = 0, `**lwd** = 1, lty = 1, type = "p", add = FALSE )

As you can see that one of the arguments is **lwd, **and its value is 1.

Let’s create a plot based on the equation: **y = x ^ 3**.

```
x <- c(1, 2, 3, 4, 5, 6, 7)
y <- c(1, 8, 27, 64, 125, 216, 343)
plot(x, y, pch=23, col = "black", bg = "yellow", lwd=1, cex=1.5)
```

**Output**

In this plot, we have passed **lwd = 1 **value, and you can see that the diamond point’s border has width 1.

If we change the **lwd = 2**, then the width will be increased.

Now, you can clearly see the width of the diamond point, and it is clearly visible. So, this is where the **lwd** parameter is useful while plotting your dataset into a graph.

You can customize many features of your graphs using the plot() function. For example, you can modify the colors, axes, titles, and fonts using various graphic options.

To specify all these options, use the **par( ) **function. If you set parameter values here, the changes will affect the rest of the session or until you change them again. The format is **par( optionname=**

*value*

**,**

*optionname*=*value*

**,**…

**).**

Use the pch option to define the symbols for your plotting points. From symbols **21** through **25**, you can define the border color (col=) and fill color (bg=). There are various options that can help you to specify the color for various properties of the plot.

**Conclusion**

For plotting points in R, use the **lty** and **lwd** options for changing lines type and thickness in R.

That is it for lwd in R tutorial.