/**
* Plots the line segments connecting
* (<em>i</em>, <em>a</em><sub><em>i</em></sub>) to
* (<em>i</em>+1, <em>a</em><sub><em>i</em>+1</sub>) for
* each <em>i</em> to standard draw.
*
* @param a the array of values
*/
public static void plotLines(double[] a) {
validateNotNull(a);
int n = a.length;
StdDraw.setXscale(-1, n);
StdDraw.setPenRadius();
for (int i = 1; i < n; i++) {
StdDraw.line(i-1, a[i-1], i, a[i]);
}
}
/**
* Draws this rectangle to standard draw.
*/
public void draw() {
StdDraw.line(xmin, ymin, xmax, ymin);
StdDraw.line(xmax, ymin, xmax, ymax);
StdDraw.line(xmax, ymax, xmin, ymax);
StdDraw.line(xmin, ymax, xmin, ymin);
}