problem.btran

Purpose

Post-multiplies a (row) vector provided by the user by the inverse of the current basis.

Synopsis

problem.btran(vec)

Argument

vec	Array of length problem.attributes.rows containing the values by which the basis inverse is to be multiplied. The transformed values will also be returned in this array.

Example

Get the (unscaled) tableau row z of constraint number irow, assuming that all arrays have been dimensioned.

y = [0,1,0,0]
p.btran(y)
print("btran result:", y)

Further information

If the problem is in a presolved state, btran works with the basis for the presolved problem.