Initializing help system before first use

# XPRSgetobjn

Purpose
For a given objective function, returns the objective coefficients for the columns in a given range.
Topic areas
Problem Information, Multiobjective
Synopsis
`int XPRS_CC XPRSgetobjn(XPRSprob prob, int objidx, double objcoef[], int first, int last);`
Arguments

prob | The current problem.
objidx | Index of the objective function whose coefficients to return.
objcoef | Double array of length last-first+1 where the objective function coefficients are to be placed.
first | First column in the range.
last | Last column in the range.

Example
The following example retrieves the coefficients of the first objective function in the current problem:

    int cols;
    double *objcoef;
    ...
    XPRSgetintattrib(prob,XPRS_COLS,&cols);
    objcoef = (double *) malloc(sizeof(double)*cols);
    XPRSgetobjn(prob, 0, objcoef, 0, cols-1);

Further information
1. This function always returns the objective coefficients from the original problem: it will raise an error if the problem is presolved.
2. The coefficients of the main objective ( objidx=0) can also be retrieved using XPRSgetobj.
Related topics
XPRSchgobjn, XPRSaddobj, XPRSdelobj, XPRSgetobj.
Parent Topic Console and Library Functions

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