R Graphics - Revision history

Scott: /* Graphics package functions */

2011-09-16T23:42:07Z

Graphics package functions

← Older revision		Revision as of 23:42, 16 September 2011
Line 15:		Line 15:
	* '''<code>contour(x,y,z)</code>''' like image, but contour map		* '''<code>contour(x,y,z)</code>''' like image, but contour map
	* '''<code>heatmap(x)</code>''' plot a single variable on two axes, each representing a different factor		* '''<code>heatmap(x)</code>''' plot a single variable on two axes, each representing a different factor
	* '''<code>hist(x)</code>''' histogram		* '''<code>hist(x)</code>''' histogram, (to make a finer plot: <code>hist(x, breaks=20)</code>
	* '''<code>plot(density(x))</code>''' density plot is a continuous histogram		* '''<code>plot(density(x))</code>''' density plot is a continuous histogram

Scott: /* Graphics package functions */

2011-05-19T16:03:51Z

Graphics package functions

← Older revision		Revision as of 16:03, 19 May 2011
Line 11:		Line 11:
	* '''<code>barplot(x)</code>''' has many options		* '''<code>barplot(x)</code>''' has many options
	* '''<code>pie(x)</code>''' is pie chart		* '''<code>pie(x)</code>''' is pie chart
	* '''persp(x, y, z)''' plot a three-dimensional surface as viewed from a high point above		* '''<code>persp(x, y, z)</code>''' plot a three-dimensional surface as viewed from a high point above
	* '''<code>image(x, y, z)</code>''' plot a three-dimensional surface as viewed from directly above		* '''<code>image(x, y, z)</code>''' plot a three-dimensional surface as viewed from directly above
	* '''<code>contour(x,y,z)</code>''' like image, but contour map		* '''<code>contour(x,y,z)</code>''' like image, but contour map
	* '''<code>heatmap(x)</code>''' plot a single variable on two axes, each representing a different factor		* '''<code>heatmap(x)</code>''' plot a single variable on two axes, each representing a different factor
	* '''hist(x)''' histogram		* '''<code>hist(x)</code>''' histogram
	* '''<code>plot(density(x))</code>''' density plot is a continuous histogram		* '''<code>plot(density(x))</code>''' density plot is a continuous histogram

Scott at 23:16, 1 February 2011

2011-02-01T23:16:14Z

New page

==Packages==
'''<code>graphics</code>''' package is first choice;
'''<code>lattice</code>''' package is well suited for splitting data by a conditioning variable

==Graphics package functions==
Each function has dozens of options for customization
* '''<code>plot(x, y)</code>''' will plot vectors x and y as scatter plot
* '''<code>matplot(x, y)</code>''' plot corresponding points in an arbitrary pair of corresponding data objects
* '''<code>smoothscatter(x, y)</code>''' plots density of points for a very large number of points
* '''<code>acf(ts)</code>''' autocorrelation function plot for time series
* '''<code>barplot(x)</code>''' has many options
* '''<code>pie(x)</code>''' is pie chart
* '''persp(x, y, z)''' plot a three-dimensional surface as viewed from a high point above
* '''<code>image(x, y, z)</code>''' plot a three-dimensional surface as viewed from directly above
* '''<code>contour(x,y,z)</code>''' like image, but contour map
* '''<code>heatmap(x)</code>''' plot a single variable on two axes, each representing a different factor
* '''hist(x)''' histogram
* '''<code>plot(density(x))</code>''' density plot is a continuous histogram

==Print graphics to a file==

To print to a PNG file:
<pre>
png("test.png")
plot(density(lpt))
dev.off()
</pre>

Options:
'''<code>width (numeric), height (numeric), units ("in" for inches, etc), res (resolution as pixels per unit)</code>'''

Other file types:
'''<code>bmp, jpeg, tiff, postscript, pdf, pictex, xfig</code>'''.