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## org.lsmp.djep.vectorJep.function
Class GenMat

    java.lang.Object
      org.nfunk.jep.function.PostfixMathCommand
          org.lsmp.djep.vectorJep.function.GenMat

All Implemented Interfaces:
  CallbackEvaluationI, PostfixMathCommandI

    public class GenMat

extends PostfixMathCommand
implements CallbackEvaluationI

Generate vectors and matrices. First argument gives the size of the vector or matrix second argument is the function to use to generate elements of vector or matrix. Third argument (if present gives free variables used in the function, these will run from 1 to number of rows or columns). For example

     GenMat(3,1) -> [1,1,1]
     GenMat(3,ii,ii) -> [1,2,3]
     GenMat(3,rand()) -> [0.343,0.974,0.567]
     GenMat([2,2],ii+jj,[ii,jj]) -> [[2,3],[3,4]]

Note the free variables should not be the same name as variables already in use, in particular i is often set to be the complex root of unity, and should be avoided.

Author:
  Rich Morris Created on 14-Feb-2005

Field Summary

Fields inherited from class org.nfunk.jep.function.PostfixMathCommand
`curNumberOfParameters, numberOfParameters`

Constructor Summary
`GenMat()`

Method Summary
`boolean` | `checkNumberOfParameters(int n)` Checks the number of parameters of the function.
`java.lang.Object` | `evaluate(Node node, EvaluatorI pv)` Performs some special evaluation on the node.

Methods inherited from class org.nfunk.jep.function.PostfixMathCommand
`checkStack, getNumberOfParameters, run, setCurNumberOfParameters`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### GenMat

    public GenMat()

Method Detail

### checkNumberOfParameters

    public boolean checkNumberOfParameters(int n)

  Description copied from class: `PostfixMathCommand`
  Checks the number of parameters of the function. Functions which set numberOfParameter=-1 should overload this method

  Specified by:
    `checkNumberOfParameters` in interface `PostfixMathCommandI`
  Overrides:
    `checkNumberOfParameters` in class `PostfixMathCommand`
  Parameters:
    `n` - number of parameters function will be called with.
  Returns:
    False if an illegal number of parameters is supplied, true otherwise.

### evaluate

    public java.lang.Object evaluate(Node node,
                                     EvaluatorI pv)
                              throws ParseException

  Description copied from interface: `CallbackEvaluationI`
  Performs some special evaluation on the node. This method has the responsibility for evaluating the children of the node and it should generally call

       pv.eval(node.jjtGetChild(i))

  for each child. The SymbolTable is not passed as an argument. This is because it is better practice to get and set variable values by using node.getVar().setValue() rather that through the SymbolTable with requires a hashtable lookup.

  Specified by:
    `evaluate` in interface `CallbackEvaluationI`
  Parameters:
    `node` - The current node
    `pv` - The visitor, can be used evaluate the children
  Returns:
    the value after evaluation
  Throws:
    `ParseException`

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