sum

VarDict1D.sum()

Sum all variables in an expression.

Returns:

xpress.expression

Examples

Create xpress problem:

>>> import xpress as xp
>>> import warnings
>>> warnings.filterwarnings('ignore', category=xp.LicenseWarning)

>>> prob = xp.problem()

Create index-set:

>>> nodes = IndexSet1D(['A', 'B', 'C'], name='node')

Add variables:

>>> from opti_extensions.xpress import addVariables
>>> node_select = addVariables(prob, nodes, name='node-select', vartype=xp.binary)

Sum all variables:

>>> node_select.sum()
node-select(A) + node-select(B) + node-select(C)