Shulou(Shulou.com)06/03 Report--

In this issue, the editor will bring you about what is the table function. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

Count the frequency distribution of factor classification attributes

Calculate contingency table table:uses the cross-classifying factors to build a contingency table of the counts at each combination of factor levels

Count the number of occurrence of each pair of factor horizontal combinations.

Table (XBI y)

1. X and y belong to two columns of the same data, both of which are factor list: list the number of times that no horizontal combination of factor appears in data in the form of a table

2. X and y are two independent column vectors of the same length: similar to generating a two-column data with cbind (xperience y), and counting the number of times each pair of factor horizontal combinations appear in data.

In the regression model, if two nominal variables are included, the table function is often used to calculate the quantitative relationship of the observed values before studying their interaction.

The result of the table function is a table

The following functions can be applied:

(1) prop.table (tableX): convert tableX to percentage proportion

(2) prop.table (tableX,1): calculate the percentage of tableX by row

(3) prop.table (tableX,2): calculate the percentage of tableX by column

(4) fisher.test (tableX): Fisher Exact Test of independency

The above is the editor for you to share what is the table function, if you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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