R GraphicsLesson 28Free preview

R Bars

This lesson is part of R · All levels

Summary

This lesson reviews the bar chart in R using the barplot() function. A bar diagram is very effective for comparing the magnitude of values between different categories. Developers will study the making of vertical and horizontal bar diagrams, stacked bar diagrams, and grouped bar diagrams.

Key points

The 'barplot(tinggi)' function creates a bar diagram of a vector or data matrix
The 'names.arg' argument gives a label name to each stem
The 'horizontal' argument transforms the diagram into a horizontal bar
If the input is a matrix, the 'beside = TRUE' argument will produce a grouped barplot

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