'Create a PlotItem and place it in the next available cell (or in the cell specified)
All extra keyword arguments are passed to :func:`PlotItem.__init__ <pyqtgraph.PlotItem.__init__>`
Returns the created item.'

def addPlot(self, row=None, col=None, rowspan=1, colspan=1, **kargs):

    plot = PlotItem(**kargs)
    self.addItem(plot, row, col, rowspan, colspan)
    return plot
