DATA MINING
Desktop Survival Guide by Graham Williams |
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Basic Bar Chart |
A bar chart is useful to illustrate distributions of the population.
In the following bar chart five classes of patient disease groups are
identified, and a distribution of three age groups is shown for each
disease group.
bars <- matrix(c(35, 15, 26, 25, 18, 45, 42, 48, 12, 35, 20, 63, 26, 34, 28), nrow=3, byrow=T) rownames(bars) <- c("0-19", "19-60", "61-100") colnames(bars) <- c("Asthma", "Cancer", "Diabetes", "Mental", "Musculo") col <- c("lightyellow", "mistyrose","darkkhaki") barplot(bars, beside=TRUE, col=col) legend("topright", rownames(bars), title="Age Groups", fill=col) |