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Defining Macros on the Command Line Macros can…

Defining Macros on the Command Line

Macros can be defined on the Make command line. For example:

make CFLAGS=–ms
would start up Make and define the macro CFLAGS with the value “–ms”. Macros defined on the command line take precedence over macros of the same name defined in the makefile.

If a command-line macro contains spaces, it must be enclosed in double quotes as in:

make “CFLAGS=-ms -z -p”

http://www.opussoftware.com/tutorial/TutMakefile.htm

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Side by side comparison between ggplot2 and lattice…

Side by side comparison between ggplot2 and lattice
http://learnr.wordpress.com/tag/ggplot2/

Code examples and plot output
http://wiki.stdout.org/rcookbook/Graphs/

And of course,
http://had.co.nz/ggplot2/

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Differences in zooming or scaling in ggplot Either…

Differences in zooming or scaling in ggplot.

Either scale_y_continuous() or coord_cartesian() can be used but they work in slightly different way.
scale_y_continuous (or scale_x_continuous) will drop data which are out of the range, while coord_cartesian() won’t. It does not affect the plot if the plot is drawn only with the given data. However, if the plot includes processed data by ggplot, such as smoothing or histogram, the result may not the same.

http://had.co.nz/ggplot2/coord_cartesian.html