gf_dhistogram()
The gf_dhistogram() function is very similar to the gf_histogram() function, however, the difference is that gf_dhistogram() will create a density histogram for a quantitative variable. This means it will show the percentage of cases for each value of the variable, whereas, gf_histogram() will show the count of the cases for each value of the variable. In other words, a density histogram will give you the relative frequency of values, while, a regular histogram will give you the raw frequency.
A density histogram is also known as a relative frequency histogram.
Example 1:
Example 1:
# Create a density histogram
# Notice the y-axis is labeled as "density" and the units are percentages
gf_dhistogram( ~ Thumb , data = Fingers )
Example of output from running the code above:
Example 2:
# Create a frequency histogram
# Notice the y-axis is labeled as "count" and the units are raw values
gf_histogram( ~ Thumb , data = Fingers )
Example of output from running the code above:
