How can I format a float using matplotlib's LaTeX formatter?

With old stype formatting:

print r'$%s \times 10^{%s}$' % tuple('3.5e+20'.split('e+'))

with new format:

print r'${} \times 10^{{{}}}$'.format(*'3.5e+20'.split('e+'))

You can do something like:

ax.set_title( "${0} \\times 10^{{{1}}}$".format('3.5','+20'))

in the old style:

ax.set_title( "$%s \\times 10^{%s}$" % ('3.5','+20'))

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