Frequency histogram (hist)

The frequency histogram (frequency histogram) is also known as the frequency distribution histogram. A graph representing the frequency distribution in statistics. In a Cartesian coordinate system, the values of random variables are represented by the horizontal axis, and each small interval on the horizontal axis corresponds to the group spacing of a group, as the bottom edge of a small rectangle, the longitudinal axis represents the frequency (frequency/Group distance = frequency), and is used as a small rectangle with a set of small rectangles called the frequency histogram.

 r Language example  > x = C (. 4, 5, 2, 8, 3, 1, 4,. 25> cats = Cut (X,breaks=c (0,1,5,max (x))) #   Group  > Levels (CATS) = C ( " a   ", "  b   ", "  c   " )  > table (cats  > Barplot (Table (CATS)) #   error, must be Numeric  > hist (cats)  > hist (x,probability=true) #   density  

Frequency histogram (hist)