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latex - How to automate x[i]→x_{i}?


I have several Mathematica expressions in which subscripts are expressed with square brackets. E.g. x[12] is meant to represent x12, etc. If I evaluate TeXForm on such an expression, x[12], e.g., gets converted to x(12). Is there a way to get it to produce the x_{12} form instead?



Answer




Probably the easiest solution here is to use


Format[x[arg_],TraditionalForm]:=Subscript[x, arg]

This makes sure that the subscript form is used when the display is in TraditionalForm, which is also an intermediate step in creating TeXForm. Then you get for example


1+x[13]//TeXForm


$x_{13}+1$



The Format can't be specified directly for TeXForm because then expressions where your x[12] is surrounded by other things as in 1 + x[12] won't get translated correctly.



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