Adds a new plot for the given set of data and/or labels, Generates a SimplePlotWidget

        :param xdata: index values for data, plotted on x-axis
        :type xdata: numpy.ndarray
        :param ydata: value data to plot, dimension must match xdata
        :type ydata: numpy.ndarray

def addPlot(self, xdata, ydata, xlabel=None, ylabel=None, title=None, xunits=None, yunits=None):
        """Adds a new plot for the given set of data and/or labels, Generates a SimplePlotWidget

        :param xdata: index values for data, plotted on x-axis
        :type xdata: numpy.ndarray
        :param ydata: value data to plot, dimension must match xdata
        :type ydata: numpy.ndarray
        """
        p = SimplePlotWidget(xdata, ydata)
        p.setLabels(xlabel, ylabel, title, xunits, yunits)
        # self.plots.append(p)
        self.stacker.addWidget(p)