import numpy

from matplotlib import pyplot
from matplotlib import gridspec

import matplotlib
matplotlib.rc("text", usetex=True)

def plot(file_path):
    gs = gridspec.GridSpec(
            3, 1,
            wspace=0.0, hspace=0.0
            )
    fig = pyplot.figure()

    # Add plots
    for sub_plot in gs:
        ax = fig.add_subplot(sub_plot)

    # position text based on location of subplots
    fig.tight_layout()
    row_bottom, row_top, col_left, col_right = gs.get_grid_positions(fig)

    # Finding the vertical centre like this because the axis label for
    # the plots I create  should be shared with only some of the subplots
    vertical_centre = numpy.mean([row_bottom[-1], row_top[0]])
    fig.text(
            0.01, vertical_centre,
            r"$\mathrm{Response \, \left(Normalised\right)}$",
            ha="center", va="center",
            rotation="vertical",
            transform=fig.transFigure,
            fontsize=35.  # lage size to emphasize error
            )

    fig.savefig(file_path, bbox_inches="tight")
    pyplot.close(fig)

plot("./test_eps.eps")
plot("./test_pdf.pdf")
plot("./test_png.png")