Some of the functions in the C Stat Library allow the data to contain missing values. These functions recognize as a missing value the special value referred to as “Not a Number” or NaN. The actual value is different on different computers, but it can be obtained by reference to the function imsls_f_machine, described in Chapter 15, “Utilities”.
The way that missing values are treated depends on the individual function and is described in the documentation for the function.
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