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Data Visualization
A practical introduction.
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Data Visualization
ggplot() object and the
+” symbol.
At this point, ggplot will have enough information to be able to draw
a plot for you. The rest is just details about exactly what you want
to see. If you don’t spec...
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Data Visualization
qr). So you can see that the
summary() function is selecting and printing only a small amount of core information, in comparison to what is stored in the model object.
Just like the tables of data we...
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Data Visualization
theme_grey() as the default. If these are not to your taste, install the
ggthemes library for many more options. You can, for example, make ggplot output look like it has been featured in the
Econom...
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Data Visualization
7
Data comes in an untidy form all the time, often for the good reason
that it can be presented that way using much less space, or with far
less repetition of labels and row elements. Figure
A.2 shows...
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Data Visualization
To produce color output on screens or in print we use various
color
models that mix together color components to get specific outputs.
Using the RGB model, a computer might represent color in terms o...