IDL is the well-known and widely used product of Research Systems, Boulder, Colorado. It is a complete computing environment for the interactive analysis and visualization of data. IDL 5.1, the most recent version of IDL, has a new routine named CONSTRAINED_MIN for the solution of constrained nonlinear optimization problems that uses GRG2 as its solution engine. The CONSTRAINED_MIN interface makes it possible to solve constrained optimization problems in the IDL environment. The objective function and constraint functions are supplied to CONSTRAINED_MIN as an IDL function. For more information about IDL and CONSTRAINED_MIN you can contact RSI by phone: 303-786-9900, by email: info@rsinc.com, or visit their web site: www.rsinc.com.
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