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# XPRSgetmqobj, XPRSgetmqobj64

Purpose
Returns the nonzeros in the quadratic objective coefficients matrix for the columns in a given range. To achieve maximum efficiency, XPRSgetmqobj returns the lower triangular part of this matrix only.
Topic areas
Problem Information, Quadratic
Synopsis
`int XPRS_CC XPRSgetmqobj (XPRSprob prob, int start[], int colind[], double objqcoef[], int maxcoefs, int *p_ncoefs, int first, int last);`
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`int XPRS_CC XPRSgetmqobj64 (XPRSprob prob, XPRSint64 start[], int colind[], double objqcoef[], XPRSint64 maxcoefs, XPRSint64 *p_ncoefs, int first, int last);`
Arguments

prob | The current problem.
start | Integer array of length last-first+2 which will be filled with indices indicating the starting offsets in the colind and objqcoef arrays for each requested column. Column i starts at position start[i] in the colind and objqcoef arrays, and has start[i+1]-start[i] elements in it. May be NULL if maxcoefs is 0.
colind | Integer array of length maxcoefs which will be filled with the column indices of the nonzero elements in the lower triangular part of Q. May be NULL if maxcoefs is 0.
objqcoef | Double array of length maxcoefs which will be filled with the nonzero element values. May be NULL if maxcoefs is 0.
maxcoefs | The maximum number of elements to be returned (size of the arrays).
p_ncoefs | Pointer to an integer where the number of nonzero quadratic objective coefficients will be returned. If the number of nonzero coefficients is greater than maxcoefs, then only maxcoefs elements will be returned. If p_ncoefs is smaller than maxcoefs, then only p_ncoefs will be returned. May be NULL.
first | First column in the range.
last | Last column in the range.

Further information
The objective function is of the form cTx+0.5xTQx. Note that only the upper or lower triangular part of the Q matrix is returned.
Related topics
XPRSchgmqobj, XPRSchgqobj, XPRSgetqobj.
Parent Topic Console and Library Functions

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