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GET DATA STDV(datavar,s,e) GET the STandard DeViation of DATA over a time range |
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Returns the standard deviation of a Data variable over a time range. If there are less than 2 data points in the time range, or the variable is not a Data variable then :NA: is returned.
NOTE The GET DATA … functions are relatively slow and best used inside of INITIAL equations.
Units: GET DATA STDV(units,time,time) --> units
Example
| Standard Deviation of Sales Data = INITIAL( |
| GET DATA STDV(sales data,Initial Time, Final Time)) |
Availability: Not PLE or PLE Plus.
See also: Data Equations, :NA:
Sample model: GET DATA stats.mdl in FunctionExamples
