Initializing help system before first use

problem.addVariable

Purpose
Creates a variable within the problem.
Synopsis
v = problem.addVariable(name=None, lb=0, ub=xpress.infinity, threshold=1, vartype=xpress.continuous)
Arguments
name 
a Python UTF-8 string containing the name of the variable (its ASCII version will be saved if written onto a file); a default name is assigned if the user does not specify it.
lb 
Lower bound (0 by default).
ub 
Upper bound (+infinity by default).
threshold 
the threshold for semi-continuous, semi-integer, and partially integer variables; it must be between its lower and its upper bound; it has no default, so if a variable is defined as xpress.partiallyinteger the threshold must be specified.
vartype 
xpress.continuous 
for continuous variables;
xpress.binary 
for binary variables;
xpress.integer 
for integer variables;
xpress.semicontinuous 
for semi-continuous variables;
xpress.semiinteger 
for semi-integer variables;
xpress.partiallyinteger 
for partially integer variables.
Example 
p = xpress.problem()
x = p.addVariable(vartype=xpress.binary)
Y = [p.addVariable() for i in range(20)]
Further information
The addVariable function can also be used to add existing unlinked variables to a problem. This usage is deprecated. See xpress.var for examples of using unlinked variables.
Related topics
problem.addVariables

Parent Topic Xpress problem methods

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