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SymVector.java

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package symjava.matrix;

import java.util.Iterator;

import java.util.Vector;

import symjava.symbolic.Expr;

public class SymVector implements Iterable<Expr> {

protected Vector<Expr> data = new Vector<Expr>();

public SymVector() {

}

public SymVector(Expr[] array) {

for(Expr e : array)

data.add(e);

}

public SymVector(int size) {

data.setSize(size);

}

public Expr get(int i) {

return data.get(i);

}

public void set(int i, Expr expr) {

data.set(i, expr);

}

public void add(Expr e) {

data.add(e);

}

public int dim() {

return data.size();

}

public Expr[] getData() {

return data.toArray(new Expr[0]);

}

// \left[ {\begin{array}{c}

// 1\\

// 3\\

// \end{array} } \right]

public String toString() {

StringBuilder sb = new StringBuilder();

sb.append("\\left[ {\\begin{array}{c}");

for(int j=0; j<data.size(); j++) {

sb.append(data.get(j)+"\\\\\n");

}

sb.append("\\end{array} } \\right]");

return sb.toString();

}

@Override

public Iterator<Expr> iterator() {

return data.iterator();

}

public SymVector subs(Expr from, Expr to) {

SymVector rlt = new SymVector();

for(Expr e : data) {

rlt.add(e.subs(from, to));

}

return rlt;

}

public SymVector diff(Expr expr) {

SymVector rlt = new SymVector();

for(Expr e : data) {

rlt.add(e.diff(expr));

}

return rlt;

}

}