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XPRSgetqrowqmatrix

XPRSgetqrowqmatrix

Purpose
Returns the nonzeros in a quadratic constraint coefficients matrix for the columns in a given range. To achieve maximum efficiency, XPRSgetqrowqmatrix returns the lower triangular part of this matrix only.
Synopsis
int XPRS_CC XPRSgetqrowqmatrix(XPRSprob prob, int irow, int mstart[], int mclind[], double dqe[], int size, int * nels, int first, int last);
Arguments
prob 
The current problem.
irow 
Index of the row for which the quadratic coefficients are to be returned.
mstart 
Integer array which will be filled with indices indicating the starting offsets in the mclind and dobjval arrays for each requested column. It must be length of at least last-first+2. Column i starts at position mstart[i] in the mrwind and dmatval arrays, and has mstart[i+1]-mstart[i] elements in it. May be NULL if size is 0.
mclind 
Integer array of length size which will be filled with the column indices of the nonzero elements in the lower triangular part of Q. May be NULL if size is 0.
dqe 
Double array of length size which will be filled with the nonzero element values. May be NULL if size is 0.
size 
Number of elements to be saved in mclind and dqe. If size < *nels, only size elements are written.
nels 
Pointer to the integer where the number of nonzero elements in the queried columns will be returned. If the number of nonzero elements is greater than size, then only size elements will be returned. If nels is smaller than size, then only nels will be returned.
first 
First column in the range.
last 
Last column in the range.
Related topics
XPRSloadqcqp, XPRSgetqrowcoeff, XPRSaddqmatrix, XPRSchgqrowcoeff, XPRSgetqrowqmatrixtriplets, XPRSgetqrows, XPRSchgqobj, XPRSchgmqobj, XPRSgetqobj.

Parent Topic Console and Library Functions

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