Table table;

float frequency=4; //data frequency in Hz
int duration=1000*10; //in ms

void setup() {
  table = new Table();
  table.addColumn("time"); // in milliseconds
  table.addColumn("heartrate");
  table.addColumn("random");
  
  for (int i=0;i<(int)(duration/frequency);i++) {
    TableRow newRow = table.addRow();
    newRow.setInt("time", (int)(i*(1000/frequency)));
    newRow.setFloat("heartrate", noise(i/10)*40.0+60);
    newRow.setFloat("random", random(1));
  }
  
  saveTable(table, "data.csv");
  println("Finished");
}