How can i numerate x axis in a graph?

import grafica.*;

This code bellow is about making a graph from, loading a csv file.My only problem is that i can not numerate the x axis, as you see in the picture of my graph bellow.But my y axis was numerated automatically.


import grafica.*;

GPlot plot;

Table table;

void setup() {
   size(800, 410);
  table = loadTable("data.csv", "header");
  table.setColumnType("time", Table.FLOAT);
  table.setColumnType("ECG", Table.FLOAT);

  GPointsArray points = new GPointsArray();
  float[] pointSizes = new float[table.getRowCount()];
   for (int row = 0; row < table.getRowCount(); row++) {
    Float time = table.getFloat(row,"time");
   Float ECG = table.getFloat(row,"ECG");

     points.add(time,ECG);
      pointSizes[row] =5;
  }
  plot = new GPlot(this);
  plot.setPos(0, 0);
  plot.setDim(700, 300);
  plot.setMar(60, 70, 40, 70);
  plot.getXAxis().setNTicks(0);
  plot.setPoints(points);
  plot.setPointColor(color(100, 100, 255, 50));
  plot.setPointSizes(pointSizes);
  plot.getYAxis().setAxisLabelText("ECG");
  plot.getXAxis().setAxisLabelText("Time");
  plot.setAxesOffset(1);
  plot.setTicksLength(1);


}
void draw() {
  background(255);

  // Draw the plot
 plot.beginDraw();
  //plot.defaultDraw();
  plot.drawBackground();
  plot.drawBox();
  plot.drawXAxis();
  plot.drawYAxis();
  plot.drawTopAxis();
  plot.drawRightAxis();
  plot.drawTitle();
  plot.drawPoints();
  plot.drawLines();
  plot.drawGridLines(GPlot.BOTH);
  plot.drawLines();
   plot.drawLabels();
  //plot.drawGridLines(GPlot.VERTICAL);
  //plot.drawFilledContours(GPlot.HORIZONTAL, 0);
  plot.endDraw();
 }