Evaluate the derivative of a two-dimensional tensor-product spline, given its tensor-product B-spline representation. Classes : E3a2 . Evaluation of derivatives of fitted functions Type : Fortran subroutine in IMSLM library. Access : Proprietary. Many implementations available. Precision: Double. Usage : R = DBS2DR(IXDER, IYDER, X, Y, KXORD, KYORD, XKNOT, YKNOT, NXCOEF, NYCOEF, BSCOEF) Details : Documentation Example Sites : (1) ITL
ITL: Unix Workstation Network, National Institute of Standards and Technology (NIST), Gaithersburg, MD. Available to NIST staff. Precision: Double. (Single: BS2DR) Access available only to NIST staff on internal Unix systems. They may access this package provided the /itl tree is cross-mounted. Link : Login to spruce.nist.gov and see ITL How-To for information on how to setup your environment and link. Documentation: cat /home/fetch/Subjects/Math-Stat-Software/imsl/Documentation/dbs2dr Example : cat /home/fetch/Subjects/Math-Stat-Software/imsl/Examples/dbs2dr
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