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- <a name="lpsolve-calling-conventions"></a>
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- <a name="lpsolve-calling-conventions-1"></a>
- <h3 class="subsection">D.15.1 <code>lpsolve</code> calling conventions</h3>
- <p>The library is able to solve linear and mixed integer programming
- problems, depending on which function is selected. The
- <a name="index-linear-programming-2"></a>
- function to call the linear programming solver is of the form
- </p>
- <ul>
- <li> <code>library('lpsolve','stdform')</code>
- </li></ul>
- <a name="index-mixed-integer-programming-1"></a>
- <p>and the mixed integer programming functions are of the form
- </p>
- <ul>
- <li> <code>library('lpsolve','iform')</code>
- </li><li> <code>library('lpsolve','bform')</code>
- </li><li> <code>library('lpsolve','biform')</code>
- </li></ul>
- <p>The argument to the <code>stdform</code> function represents a triple
- <code>(<var>c</var>,(<var>m</var>,<var>y</var>))</code>, which has the same interpretation
- described in <a href="glpk-input-parameters.html#glpk-input-parameters"><code>glpk</code> input parameters</a>. The arguments to the <code>iform</code>,
- <code>bform</code>, and <code>biform</code> functions are tuples
- <code>(<var>i</var>,(<var>c</var>,(<var>m</var>,<var>y</var>)))</code>
- <code>(<var>b</var>,(<var>c</var>,(<var>m</var>,<var>y</var>)))</code>, and
- <code>((<var>b</var>,<var>i</var>),(<var>c</var>,(<var>m</var>,<var>y</var>)))</code>, respectively, where
- <var>c</var>, <var>m</var>, and <var>y</var> are as above, and
- </p>
- <ul>
- <li> <var>b</var> is a list of binary variable column indices
- </li><li> <var>i</var> is a list of integer variable column indices
- </li></ul>
- <p>where column indices pertain to the constraint matrix, and are
- numbered from zero. Specifying some or all variables as integers
- directs the solver to seek only solutions in which those variables
- have integer values, and specifying any as binary directs the solver
- to seek only solutions in which those variables have values of zero or
- one. The IEEE floating point representation is used for all variables
- regardless (<a href="math.html#math"><code>math</code></a>).
- </p>
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