R language uses ISNA function to check whether the list and dataframe contain missing values, marks abnormal values in data columns in dataframe as missing values Na, and uses na.omit function to dele

R Language use isna Function to view the list and dataframe Contains missing values in 、 take dataframe Outliers in the data column in are marked as missing values NA、dataframe If the list contains missing values NA Then the result of calculation is NA、 Use na.omit Function delete dataframe Contains missing value in NA The data line

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