def stackplot(marray, seconds=None, start_time=None, ylabels=None):
    """
    will plot a stack of traces one above the other assuming
    marray.shape = numRows, numSamples
    """
    tarray = np.transpose(marray)
    stackplot_t(tarray, seconds=seconds, start_time=start_time, ylabels=ylabels)
    plt.show()