Bar graphs are used to organize data into rectangles. There are a few different types of bar graphs that can be made in TinkerPlots.

Case-Value Plot of heart rate for 12 people

This plot can be confusing for students because the vertical axis is not a frequency/count. The length of the bar drawn for each data value represents the actual data value. For example, the first person has a heart rate of approximately 72 beats per minute. The data for 12 people is shown in no particular order. I discourage the use of the case-value plot.
CaseValuePlot.png

Dot Plot / Fused Dot Plot

The same data is show below in a dot plot and a bar graph (I call this a fused dot plot). The bar graph was created by fusing the dots together. While the second plot is a bar graph, I do not use fused dot plots because it is difficult to see the count. The dot plot allows us to see each individual case.
DotPlot and BarGraph.png

Histogram

A histogram is used for numeric data that can assume any value in a range. The data for this set of 12 people is shown below. There are six bins ranging from 68 to 86 with a width of 3 beats per minute. The count is marked on the vertical axis. The data from the dot plot is first clustered in bins, then the dots are fused.
Histogram_HR.png
The plot below has dots divided into six bins (the icons not fused). Note that this is not a dot plot because there are intervals instead of a number line along the horizontal axis.
Unfused Bins.png
Note: The lower value was changed from the default setting of 69 to 68 beats per minute.

All but 12 cases were deleted.

Attribute Description

Gender: Gender of person
Temperature: Body temperature (degrees Fahrenheit)
HeartRate: Number of heart beats (per minute)

These data are based on a data set presented in Mackowiak, P. A., Wasserman, S. S., & Levine, M. M. (1992), "A Critical Appraisal of 98.6 Degrees F, the Upper Limit of the Normal Body Temperature, and Other Legacies of Carl Reinhold August Wunderlich," Journal of the American Medical Association, 268, 1578-1580.