## Concerning Certain Types of Continuous Curves by Whyburn G. T.

By Whyburn G. T.

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Arg= sales\$City, horiz=TRUE, col="black") How it works... The first argument of the barplot() function is either a vector or matrix of values that you want to plot as bars, such as the sales data variables in our previous examples. R automatically used the product names as the labels and we had to instead specify the city names as the legend. This is a common feature throughout R, and col is used to set the color of the main feature in any kind of graph. There's more... For example, sales[2,3] refers to the value in the second row and third column.

All of these arguments and more are explained in detail in Chapter 3, Beyond the Basics – Adjusting Key Parameters. There's more... plot or help(plot) at the R prompt, after plotting the first dataset with plot(). To see the complete list of available datasets, call the data() function simply by running it at the R prompt: data() See also Scatter plots are covered in a lot more detail in Chapter 4, Creating Scatter Plots. In this recipe, we will see how we can quickly plot such data using the same plot() function that was used in the previous recipe to make scatter plots.