Fill value意思

"Fill value" is a term used in various contexts, including statistics, data analysis, and programming, and it refers to a value that is used to replace missing or undefined data points. In statistics and data analysis, a fill value is often used to replace missing data in a dataset so that the data can be analyzed properly. For example, if a dataset has a missing value for a particular variable, a fill value such as zero, mean, or median of the variable could be used to replace the missing value.

In programming, a fill value is a value that is used to initialize an array or a data structure with a certain default value. For example, when creating a new array, you can specify a fill value to initialize all elements of the array with the same value.