Function fmt_e

lib/mpl_toolkits/mplot3d/tests/test_axes3d.py:3032–3038

(x, pos=None)

        if base == np.e:
            # Format tick labels as e^n instead of 2.718...^n
            def fmt_e(x, pos=None):
                if x <= 0:
                    return ''
                exp = np.log(x)
                if np.isclose(exp, round(exp)):
                    return r'$e^{%d}$' % round(exp)
                return ''
            ax.xaxis.set_major_formatter(fmt_e)
            ax.yaxis.set_major_formatter(fmt_e)
            ax.zaxis.set_major_formatter(fmt_e)