python - Matplotlib subscript -


i know can produce single subscript in matplotlib 

$r_i

will give me r "i" subscript.

but want generate subscript 3 or 4 letters, r_ijk should give me r "ijk" subscript.

when above, first ("i") subscript, rest ("j" & "k") becoming normal scripts.

i tried r_{ijk} , did trick! trying () braces.


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