Primary exercises

  1. Logarithmic scale and manual colors.
    For the pulse data construct the plot shown below.
    Add scale_x_log10 and scale_y_log10 to change both location scales to logarithmic.
    Enforce the same limits from 50 to 150 on both scales.

Extra exercises

  1. Advanced scales.
    The scales package extends ggplot2 functionality by providing “tools to override the default breaks, labels, transformations and palettes”.
    Have a look at the package reference manual to get familiar with types of scales it may provide for your projects.

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