R language Note 4--graphic analysis

1, histogram analysis of X1, Draw histogram hist ()

2, explore the relationship between the results of various subjects, scatter plot plot function plot ()

3. Table analysis, column-linked function table (), Histogram drawing function Barplot ()

4, pie chart, pie chart plot function pie ()

5, Box tail diagram

The upper and lower lines of the box are 25% and 75% of the sample.

The middle line of the box is the median of the sample

The line that extends up and down is the tail line and the end of the tail line is the highest and lowest value.

Exception value

6, Box line diagram

7. Phase diagram

The value of each observation unit is represented as a graph

Each corner of each graph represents a variable, and the string type is labeled below the graph

The length of the angular line expresses the size of the value

Note: Is 10*10, 100 for students, each student has three subjects, it is said that each student has an astrological figure, big, correct expression of good results

8. Facebook Map

Installing the Aplpack Package

>library (Aplpack)

Other Facebook Images

Installing the Teachingdemos Package

9. Stem and leaf diagram

A 63, a 66, two a 67, a 68 ...

10. QQ Map

Can be used to determine if normal distribution

The slope of the line is the standard deviation and the intercept is the mean value

The closer the scatter is to the straight line, the closer the normal distribution becomes

11. Wiring Diagram

Type= "L": l means line.

12. Density Map

13. R built-in data set

function data () lists the built-in datasets

14. Heat Force diagram

Draw with built-in Mtcars data sets

Convert the Mtcars data frame to a matrix before

15. Scatter chart

(1) Sunflower Scatter chart

Used to overcome the overlap of data points in scatter plots.

Use a "sunflower flower" number of petals in overlapping places to represent the number of overlapping data

　　

(2) Scatter atlas

Iterate through all the variable pairs in the sample to draw a two-dollar graph

Intuitively understand the relationships between all variables

The same effect can be achieved with plot

Use par () to output multiple scatter plots on the same device

Par command is extensive, used to set drawing parameters, help (PAR)

(3) Three-dimensional scatter plot

Install the Scatterplot3d package (located in the library directory where the R language is installed)

16. Harmonic curve

UNISON.R Code (script)

Custom functions

Harmonic curve is very convenient for cluster judgment

>source ("D:\\unison. R ")

>unison (X[2:4])

R language Note 4--graphic analysis