The code:
\usepackage{pgf,tikz}
\usepackage{pgfplots}
\usetikzlibrary{arrows}
\usepackage{pgfplotstable,booktabs,array,colortbl,multirow}
\newcolumntype{C}{>{\centering\arraybackslash}m{5cm}}
\pgfplotsset{compat=1.5}
\begin{table}[!hbt]
\begin{center}
\pgfplotstabletypeset[
row sep=\\,
col sep=&,
trim cells,
columns={f(x),f'(x)},
columns/f(x)/.style={string type, column type={|C|}},
columns/f'(x)/.style={string type, column type={C|}},
every nth row={1}{before row=\hline},
every head row/.style={before row=\hline, after row=\hline},
every last row/.style={after row=\hline}
]
{
f(x) & f'(x) \\
{$k$} & $0$\\
{$x$} & $1$\\
{$x^{n}$} & $n\cdot x^{n-1}$\\
{$u^{n}$} & $n\cdot x^{n-1}\cdot u^{'}$\\
{$\sqrt{x}$} & $\dfrac{1}{2\sqrt{x}}$\\
{$\sqrt[n]{u}$} & $\cfrac{u^{'}}{n\sqrt[n-1]{u^{n-1}}}$\\
{$\ln u$} & $\dfrac{u^{'}}{u}$\\
{$\log_{a}u$} & $\dfrac{u^{'}}{u}\cdot\dfrac{1}{\ln a}$\\
{$a^{u}$} & $a^{u}\cdot u^{'}\cdot\ln a$\\
{$e^{x}$} & $e^{x}$\\
{$e^{u}$} & $e^{x}\cdot u^{'}$\\
{$\sin u$} & $\cos u\cdot u^{'}$\\
{$\cos u$} & $-\sin u\cdot u^{'}$\\
{$\tan u$} & $\dfrac{u^{'}}{\cos^{2}u}$\\
{$\arcsin u$} & $\dfrac{u^{'}}{\sqrt{1-u^{2}}}$\\
{$\arccos u$} & $-\dfrac{u^{'}}{\sqrt{1-u^{2}}}$\\
{$\arctan u$} & $\dfrac{u^{'}}{1+u^{2}}$\\
{$\sinh u$} & $u^{'}\cdot\cosh u$\\
{$\cosh u$} & $u^{'}\cdot\sinh u$\\
{$\tanh u$} & $-u^{'}\cdot cosech^{2}u$\\
{$cosech\: u$} & $-u^{'}\cdot cosech\: u\cdot\coth u$\\
{$sech\: u$} & $-u^{'}\cdot sech u\cdot\tanh u$\\
{$coth\: u$} & $-u^{'}\cdot cosech^{2} u$\\
}
\caption{Tabla De Derivadas}
\end{center}
\end{table}
I want put in blue color to the text in f(x) and f'(x) When I use in a cell a fraction expression, the text touches the bottom line and top line of the cell, How can I increase the high of these cells?
Thanks.