Changes to Symbol Fonts for Cairo Graphics Devices

The symbol font When drawing text in R graphics, we can specify the font “family” to use, e.g., a generic family like “sans” or a specific family like “Helvetica”, and we can specify the font “face” to use, e.g., plain, bold, or italic. R graphics provides four standard font faces, plain, bold, italic, bold-italic, and one special font face that R calls “symbol”. The following code and output demonstrate the different font faces.