This statement sets the stored value of AGE to a numeric missing value if AGE has a value less than 0. Note: You can display a missing numeric value with a character other than a period by using the ...

Within SAS, a missing value for a numeric variable is smaller than all numbers; if you sort your data set by a numeric variable, observations with missing values for that variable appear first in the ...

Line [15] has only five fields and is missing the age value. All of these typical data problems in the demo are quite common in real-world data. But there are many other types of problems too. The ...

Moreover, while statisticians can find ways to correct for this ... To use it, first make several copies of your data set. For a given missing value in one copy, randomly assign a guess from your ...

Missing data are a frequently encountered problem in epidemiologic and clinical research.1, 2 One approach is to include in the analysis only those participants without missing observations (complete ...