How one can use a `\newcommand` for some formulas?

Question

I have some formula such as \mathbf{x}_{j_{1}}, \mathbf{x}_{j_{2}},..., and \mathbf{x}_{j_{k}}. How can I define one \newcommand for these formulas?

Thanks in advance.

score 7 · Accepted Answer · answered Apr 04 '17 at 17:41

7

I think you intend a command where to change only the variable part...

\documentclass{article}
\usepackage{amsmath, amssymb}

\newcommand{\myf}[1]{\mathbf{x}_{j_{#1}}}

\begin{document}
\[
\myf{1}, \myf{2}, \dots, \myf{k}
\]
\end{document}

answered Apr 04 '17 at 17:41

CarLaTeX

62,716

You might want to add an \ensuremath. – Skillmon Apr 04 '17 at 19:44
@Skillmon See here: http://tex.stackexchange.com/q/34830/101651 – CarLaTeX Apr 04 '17 at 19:58
@CarLaTeX thanks, never considered these (though I'm not fully convinced yet). – Skillmon Apr 05 '17 at 07:30
@Skillmon Wait, I'll ask for egreg's advice in chat! – CarLaTeX Apr 05 '17 at 07:34
@CarLaTeX he'll say 'DON'T!'. I think it depends on the usage of FahimB. – Skillmon Apr 05 '17 at 07:42
@Skillmon Why you aren't convinced, then? Please visit our chat and let's continue the discussion there! – CarLaTeX Apr 05 '17 at 07:52
1

@Skillmon Of course I say don't! ;-) You just gain in obfuscation if you allow \myf{1} to be used without segregating it in a math formula, even if it just consists in $\myf{1}$ . – egreg Apr 05 '17 at 08:28

How one can use a `\newcommand` for some formulas?

1 Answers1