## S3 method for class 'optObj_clpAPI':
changeObjCoefs(lp, j, obj_coef)## S3 method for class 'optObj_cplexAPI':
changeObjCoefs(lp, j, obj_coef)
## S3 method for class 'optObj_glpkAPI':
changeObjCoefs(lp, j, obj_coef)
## S3 method for class 'optObj_lpSolveAPI':
changeObjCoefs(lp, j, obj_coef)
optObj.j containing the objective
coefficients of the variables to change.optObj and constructor function
optObj.