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This article will explain in detail how to understand the is.null () function in R language. The content of the article is of high quality, so the editor shares it for you as a reference. I hope you will have some understanding of the relevant knowledge after reading this article.

Is.null (), is.na ()

1. In R language, NULL stands for not even a position, and the variable is empty.

A function that determines whether a vector is null: is.null ()

2. In the R language, the value at the position represented by NA is empty.

Determine whether the element in the vector is missing: is.na ()

Example:

$var_name=NULL;if (is.null ($var_name)) {print "variable var_name is NULL";} else {print "variable var_name is not NULL";} what is R language R language is used for statistical analysis, drawing language and operating environment, belongs to the GNU system of a free, free, open source software, it is an excellent tool for statistical calculation and statistical mapping.

How to understand the is.null () function in R language is shared here. I hope the above content can be helpful to you and learn more knowledge. If you think the article is good, you can share it for more people to see.

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