Histogram

Histograms are used to show variation in data. This histogram is showing how long it takes to recieve a contraceptive order. You can clearly see that most orders take about 4 weeks, however some orders come in as little as one while others take up to six.
http://escience.anu.edu.au/lecture/cg/CGIntroduction/Data/histogram.gif

Box plot

This is a box plot, box plots are used to quickly show the median and the quartiles of a set of data. In the example the median is between 60 and 80 and is approximately 75. Box plots can also be used to quickly calculate the inter-quartile range and to find any outliers (or discrepancies in the numbers).
http://edubuzz.org/blogs/nbhs3x1/files/2007/01/boxplot-2.JPG

Stem and Leaf Plot

This is a stem and leaf plot. It's purpose is to organize a set of numbers, as you can see from the example the numbers are in order from least to greatest. That is what stem and leaf plots do, order numbers from least value to greatest.
http://www.icoachmath.com/Sitemap/images/Stem-and-Leaf%20Plot1.jpg

Similarity Matrix

Similarity Matrices are used to show the likeness between two or more things. For example in this case genes are being compared. The red signifies the most similarities and the blue the least.

http://www.fxpal.com/systems/MediaAnalysis/sim10000.gif

correlation matrix

A correlation matrix is used to find a correlation or relationship among a set of data. This particular matrix is for the protein correlation of phage T7.

http://yin.che.wisc.edu/images/ProteinMatrix.jpg

Star plot

This particular map is a star plot conveying certain qualities of 16 types of cars. Starting with the 3 o'clock position on the star and going counterclockwise the qualities are:
1. Price
2.MPG (miles per gallon)
3.1978 repair record
4. 1977 repair record
5.headroom
6.Rear seat room
7. Trunk space
8.Weight
9. Length


http://www.itl.nist.gov/div898/handbook/eda/section3/gif/starplot.gif