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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