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XPRSchgrhsrange

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Purpose

Used to change the range for a row of the problem matrix.

Synopsis

int XPRS_CC XPRSchgrhsrange(XPRSprob prob, int nels, const int mindex[], const double rng[]);

Arguments

prob	The current problem.
nels	Number of range elements to change.
mindex	Integer array of length nels containing the indices of the rows on which the range elements will change.
rng	Double array of length nels giving the range values.

Example

Here, the constraint x + y 10 in the problem is changed to 8 x + y 10:

mindex[0] = 5; rng[0] = 2.0;
XPRSchgrhsrange(prob,1,mindex,rng);

Further information

If the range specified on the row is r, what happens depends on the row type and value of r. It is possible to convert non-range rows using this routine.

Value of r		Row type		Effect
r 0		= b, b		b-r ajxj b
r 0		b		b ajxj b+r
r < 0		= b, b		b ajxj b-r
r < 0		b		b+r ajxj b

Related topics

XPRSchgcoef, XPRSchgmcoef, XPRSchgrhs, XPRSgetrhsrange .

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