# LaTeX Latex Help

Tags:
1. Jun 5, 2013

### EngWiPy

Hello,

I have the following Latex code, and I need to draw an arrow that connect each column by the corresponding entry in the last (separated) row, e.g.: the column [x_0^{(1)} x_0^{(2)} ... x_0^{(M)}]^T with the entry x_0^{(R)} and so on. How can I do that?

Code (Text):
\documentclass{article}
\usepackage{tikz}
\usepackage{amsmath}
\usetikzlibrary{matrix}
\begin{document}

\tikzset{
table/.style={
matrix of nodes,
row sep=-\pgflinewidth,
column sep=-\pgflinewidth,
nodes={
rectangle,
draw=black,
align=center
},
minimum height=1.5em,
text depth=0.5ex,
text height=2ex,
nodes in empty cells,
%%
%every even row/.style={
%nodes={fill=gray!20}
%},
column 1/.style={
nodes={text width=2em,font=\bfseries}
},
column 2/.style={
nodes={text=red}
},
column 3/.style={
nodes={text=blue}
},
column 5/.style={
nodes={text=violet}
},
row 5/.style={
nodes={
fill=gray!20,
%text=black,
font=\bfseries
}
}
}
}

\begin{tikzpicture}

\matrix (first) [table,text width=6em]
{
$\mathbf{x}^{(1)}$   & $x_0^{(1)}$ & $x_1^{(1)}$ & $\cdots$ & $x_{N-1}^{(1)}$ \\
$\mathbf{x}^{(2)}$   & $x_0^{(2)}$ & $x_1^{(2)}$ & $\cdots$ & $x_{N-1}^{(2)}$ \\
$\vdots$             & $\vdots$    & $\vdots$    & $\ddots$ & $\vdots$ \\
$\mathbf{x}^{(M)}$   & $x_0^{(M)}$ & $x_1^{(M)}$ & $\cdots$ & $x_{N-1}^{(M)}$ \\[10mm]
$\mathbf{x}^{(R)}$   & $x_0^{(R)}$ & $x_1^{(R)}$ & $\cdots$ & $x_{N-1}^{(R)}$ \\
};

\end{tikzpicture}
\end{document}

2. Jun 5, 2013

### Hepth

I did one for you. I checked out this site for examples, always love learning new latex packages.

www.texample.net/tikz/examples/feature/arrows/

Basically I labelled to areas using the label maker for nodes : |[name=a]|

Then after the matrix I drew an arrow from a to b. So repeat wherever you need it.

Code (Text):
\matrix (first) [table,text width=6em]
{
$\mathbf{x}^{(1)}$   & $x_0^{(1)}$ & $x_1^{(1)}$ & $\cdots$ & $x_{N-1}^{(1)}$ \\
$\mathbf{x}^{(2)}$   & $x_0^{(2)}$ & $x_1^{(2)}$ & $\cdots$ & $x_{N-1}^{(2)}$ \\
$\vdots$             & $\vdots$    & $\vdots$    & $\ddots$ & $\vdots$ \\
|[name=a]| $\mathbf{x}^{(M)}$   & $x_0^{(M)}$ & $x_1^{(M)}$ & $\cdots$ & $x_{N-1}^{(M)}$\\[10mm]
|[name=b]| $\mathbf{x}^{(R)}$   & $x_0^{(R)}$ & $x_1^{(R)}$ & $\cdots$ & $x_{N-1}^{(R)}$ \\
};
\draw[->,thick] (a) edge (b);

3. Jun 5, 2013

### EngWiPy

Perfect. Look very nice. Thanks

4. Jun 5, 2013

### EngWiPy

Another question: How can I remove a cell completely?