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# getqrowqmatrix

Purpose
Returns the nonzeros in a quadratic constraint coefficients matrix for the columns in a given range.
To achieve maximum efficiency, getqrowqmatrix returns the lower triangular part of this matrix only.
Synopsis
`getqrowqmatrix(prob, row, first, last)`
Arguments

prob | The current problem.
row | Index of the row for which the quadratic coefficients are to be returned.
first | First column in the range.
last | Last column in the range.

Return value
A list with the following elements:

start
  Integer array containing indices indicating the starting offsets in the colind and rowqcoef arrays for each requested column.
colind
  Integer array of length maxcoefs containing the column indices of the nonzero elements in the lower triangular part of Q.
rowqcoef
  Double array of length maxcoefs containing the nonzero element values.

Further information
Please refer to the C documentation for more details.
Parent Topic R interface reference manual

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