[Tex/LaTex] ny way to make lowercase \chi bigger

fontsizemath-modesymbols

I was just wondering if it's possible to make lower case \chi bigger.

Basically I want the equation \chi^2_0 = \frac{1}{2} to have more space between the 2 and 0 like all the textbooks have but the \chi I get is tiny and so the 2 and 0 basically read like 20 vertically, is there a way to fix this/make it nicer? (I'm guessing there is since every stats textbook ever seems to be able to do it)

Best Answer

You could play around with the regular text adjustments or by using \scalebox{<factor>}{<stuff>} from the graphicx package in the following way:

\documentclass{article}
\usepackage{amsmath}% http://ctan.org/pkg/amsmath
\usepackage{graphicx}% http://ctan.org/pkg/graphicx
\begin{document}
\begin{align*}
  \chi^2_0 =& \tfrac{1}{2} \\
  \mbox{\Large$\chi$}^2_0 =& \tfrac{1}{2} \\
  \scalebox{1.5}{$\chi$}^2_0 =& \tfrac{1}{2}
\end{align*}
\end{document}

enter image description here

amsmath was just used for the align* and \tfrac functionality. If cluttering your input is a problem, you can put this in a macro (here I've chosen the first enlargement style):

\newcommand*{\bigchi}{\mbox{\Large$\chi$}}% big chi

and use it as \bigchi=\frac{1}{2}. You can play around with different font sizes or scaling values.