# Multiple rows with paragraphs in longtable

I'd like to have the third column (minus the header of that column) as a single cell. I was trying to use multirow and a "p" column to achieve the desired effect, but with no success. How might I do this?

Here is what I have so far:

\documentclass{article}
\usepackage{lscape}
\usepackage{longtable}
\begin{document}
\begin{landscape}
{\renewcommand{\arraystretch}{1.5}
\begin{longtable}{|p{3in}|p{4in}|p{1in}|}
\hline
\textbf{Conversion} & \textbf{Formulas} & \textbf{Restrictions} \\ \hline
Cylindrical to rectangular: $(r,\theta,z) \to (x,y,z)$ \par Rectangular to cylindrical: $(x,y,z) \to (r,\theta,z)$ & $x = r \cos(\theta)$, $y=r \sin(\theta)$, $z=z$ \par $r=\sqrt{x^2+y^2}$, $\tan(\theta) = y/x$, $z=z$ & {} \\ \hline
Spherical to cylindrical: $(\rho,\theta,\phi) \to (r,\theta,z)$ \par
Cylindrical to spherical: $(r,\theta,z) \to(\rho,\theta,\phi)$ & $r= \rho \sin(\phi)$, $\theta = \theta$, $z = \rho \cos(\phi)$ \par $\rho = \sqrt{r^2+z^2}$, $\theta = \theta$, $\tan(\phi)=r/z$ & $r \ge 0$, $\rho \ge 0$ \par $0 \le \theta \le 2 \pi$ \par $0 \le \phi \le \pi$ \\ \hline
Spherical to rectangular: $(\rho,\theta,\phi) \to (x,y,z)$ \par Rectangular to spherical: $(x,y,z) \to (\rho,\theta,\phi)$ & $x=\rho \sin(\phi) \cos(\theta)$, $y=\rho \sin(\phi) \sin(\theta)$, $z= \rho \cos(\phi)$ \par $\rho = \sqrt{x^2+y^2+z^2}$, $\tan(\theta) = y/x$, $\cos(\phi) = z/\sqrt{x^2+y^2+z^2}$ & {} \\ \hline
\end{longtable}
}
\end{landscape}
\end{document}

• what do you mean by "a single cell" you can not have a cell for an entire longtable (well you can but then it won't break over a page, so why use longtable rather than a standard tabular?) also note center does nothing to longtable. – David Carlisle Nov 13 '14 at 17:39
• In column 3, I'd like rows 2-4, to be merged since those restrictions are to be considered true for all the conversions listed. Hopefully that helps. – DJJerome Nov 13 '14 at 17:42
• you could just use \cline instead of \hline for those two rules, or use multirow package (if you know there is no page break in the spanned rows) – David Carlisle Nov 13 '14 at 17:45
• I tried using multirow but couldn't get it to work, hence my question. – DJJerome Nov 13 '14 at 17:48

\documentclass{article}
\usepackage[pdftex]{lscape}
\usepackage{array,longtable}
\begin{document}
\begin{landscape}
\renewcommand{\arraystretch}{1.5}
\begin{longtable}{|p{3in}|p{4in}|l|}
\hline
\textbf{Conversion} & \textbf{Formulas} & \textbf{Restrictions} \\ \hline
Cylindrical to rectangular: $(r,\theta,z) \to (x,y,z)$ \par Rectangular to cylindrical: $(x,y,z) \to (r,\theta,z)$ & $x = r \cos(\theta)$, $y=r \sin(\theta)$, $z=z$ \par $r=\sqrt{x^2+y^2}$, $\tan(\theta) = y/x$, $z=z$ & {} \\
\cline{1-2}
Spherical to cylindrical: $(\rho,\theta,\phi) \to (r,\theta,z)$ \par
Cylindrical to spherical: $(r,\theta,z) \to(\rho,\theta,\phi)$ & $r= \rho \sin(\phi)$, $\theta = \theta$, $z = \rho \cos(\phi)$ \par $\rho = \sqrt{r^2+z^2}$, $\theta = \theta$, $\tan(\phi)=r/z$ &
\smash{\begin{tabular}{@{}l@{}}
r \ge 0$,$\rho \ge 0$\\$0 \le \theta \le 2 \pi$\\$0 \le \phi \le \pi$\end{tabular}} \\ \cline{1-2} Spherical to rectangular:$(\rho,\theta,\phi) \to (x,y,z)$\par Rectangular to spherical:$(x,y,z) \to (\rho,\theta,\phi)$&$x=\rho \sin(\phi) \cos(\theta)$,$y=\rho \sin(\phi) \sin(\theta)$,$z= \rho \cos(\phi)$\par$\rho = \sqrt{x^2+y^2+z^2}$,$\tan(\theta) = y/x$,$\cos(\phi) = z/\sqrt{x^2+y^2+z^2}& {} \\ \hline \end{longtable} \end{landscape} \end{document}  The code will be simpler with the makecell package, as it allows for line breaks inside cells, so that you don't have to specify colum widths: \documentclass[a4paper]{article} \usepackage{lscape} \usepackage{longtable, multirow} \usepackage{makecell} \renewcommand\cellalign{lc} \usepackage[math]{cellspace} \setlength\cellspacetoplimit{4pt} \setlength\cellspacebottomlimit{4pt} \begin{document} \begin{landscape} \begin{longtable}{|Sl|Sl| Sl|}% \hline \textbf{Conversion} & \textbf{Formulas} & \textbf{Restrictions} \\ \hline \makecell{Cylindrical to rectangular: (r,θ,z) \to (x,y,z) $\\[0.7ex] Rectangular to cylindrical:$ (x,y,z) \to (r,θ,z) $} & \makecell{$ x = r \cos(θ) $,$ y = r \sin(θ) $,$ z = z $\\[0.7ex]$ r = √{x^2+y^2}$,$ \tan(θ) = y/x $,$ z = z $} & \multirowcell{6}[-1.4ex]{$r ≥ 0$,$ρ ≥ 0$\\$0 ≤ θ ≤ 2 \pi$\\$0 ≤ ϕ ≤ \pi$} \\ \cline{1-2} \makecell{Spherical to cylindrical:$ (ρ,θ,ϕ) \to (r, θ, z) $\\[0.7ex] Cylindrical to spherical:$ (r, θ, z) \to (ρ, θ, ϕ) $} & \makecell{$ r= ρ \sin(ϕ) $,$ θ = θ $,$z = ρ \cos(ϕ) $\\[0.7ex]$ ρ = √{r^2+z^2}$,$ θ = θ $,$ \tan(ϕ)=r/z $} & \\ \cline{1-2} \makecell{Spherical to rectangular:$(ρ, θ, ϕ) \to (x, y, z)$\\[0.7ex] Rectangular to spherical:$(x, y, z) \to (ρ, θ, ϕ)$}& \makecell{$x = ρ \sin(ϕ) \cos(θ) $,$ y = ρ \sin(ϕ) \sin(θ) $,$ z= ρ \cos(ϕ) $\\[0.7ex]$ ρ = √{x^2+y^2+z^2} $,$ \tan(θ) = y/x $,$ \cos(ϕ) = z/√{x^2+y^2+z^2} \$ } &\\
\hline
\end{longtable}
\end{landscape}

\end{document}