How to show graph as a slideshow in PyQt5.

[Binsha]

I am trying to build a software for graph plotting where graph can be shown as a slideshow so that the data can be clearly visualised. First I wish to plot a set of data then after a specific time interval next set of data and so on.

I have a text file contains data as:

0.00 -10.742 10.7888 6.33455
1.00 -17.75391 10.0000 4.66778
4.00 -19.62891 15.9999 4.232323
20.00 -20.7641 18.6666 3.99999
23.00 -34.2300 2.7777 2.00000
50.00 -50.000 1.87878 2.77778
65.88 -22.5000 2.99999 1.45555
78.00 -30.000 1.55555 2.45667
86.00 -37.7900 2.55556 7.55679
90.00 -45.00000 13.6667 2.677888
----
----
200.02 200.01 0.0000 2.6667
300.00 300.02 1.6666 2.7878

What I have tried is:

    class MatplotlibWidget(QMainWindow):
            ----
            self.playbutton.clicked.connect(self.drawGraph)
            ---       
 
        def drawGraph(self):
            f1 = open('TESTIP2.txt', 'r')            
            data = np.genfromtxt(f1)
            m = np.size(data, 0)           
            x = data[:, 0].reshape(m, 1)
            y = data[:, 1].reshape(m, 1)
            iters = m // 4
            xs=[]
            ys=[]
            for i in range(iters):
                xs.append(x[i])
                ys.append(y[i])
            self.MplWidget.canvas.axes.clear()
            self.MplWidget.canvas.axes.plot(xs,ys)
            self.MplWidget.canvas.axes.legend(('cosinus', 'sinus'), loc='upper right')
            self.MplWidget.canvas.axes.set_title('Signal' )
            self.MplWidget.canvas.draw()
 
    if __name__ == "__main__":
 
        app = QApplication([])
        window = MatplotlibWidget()
        window.show()
        app.exec_()

Currently only first set of data is working . I wish to plot next set of data from same file after a specific time interval, say 10 sec. Likewise I am trying to show next and so on.