Matplotlib - Move X-Axis label downwards, but not X-Axis Ticks

PythonMatplotlibGraphing

Python Problem Overview


I'm using Matplotlib to plot a histogram. Using tips from my previous question: https://stackoverflow.com/questions/6352740/matplotlib-label-each-bin, I've more or less go the kinks worked out.

There's one final issue - previously - the x-axis label ("Time (in milliseconds)") was being rendered underneath the x-axis tickmarks (0.00, 0.04, 0.08, 0.12 etc.)

No padding - Axis label underneath figures

Using the advice from Joe Kingston (see question above), I tried using:

ax.tick_params(axis='x', pad=30)

However, this moves both the x-axis tickmarks (0.00, 0.04, 0.08, 0.12 etc.), as well as the x-axis label ("Time (in milliseconds)"):

30 Padding - Both Axis Label and Tick Marks have Moved

Is there any way to move only the x-axis label to underneath the three rows of figures?

Nb: You may need to open the PNGs below directly - Right Click on the image, then View Image (in FF), or Open image in new tab (Chrome). The image resize done by SO has rendered them nigh unreadable

Python Solutions


Solution 1 - Python

use labelpad parameter:

pl.xlabel("...", labelpad=20)

or set it after:

ax.xaxis.labelpad = 20

Solution 2 - Python

If the variable ax.xaxis._autolabelpos = True, matplotlib sets the label position in function _update_label_position in axis.py according to (some excerpts):

    bboxes, bboxes2 = self._get_tick_bboxes(ticks_to_draw, renderer)
    bbox = mtransforms.Bbox.union(bboxes)
    bottom = bbox.y0
    x, y = self.label.get_position()
    self.label.set_position((x, bottom - self.labelpad * self.figure.dpi / 72.0))

You can set the label position independently of the ticks by using:

    ax.xaxis.set_label_coords(x0, y0)

that sets _autolabelpos to False or as mentioned above by changing the labelpad parameter.

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Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionvictorhooiView Question on Stackoverflow
Solution 1 - PythonHYRYView Answer on Stackoverflow
Solution 2 - PythonMatthias123View Answer on Stackoverflow