[Tex/LaTex] Making \xrightarrow longer but without using spaces

amsmatharrowstables

I have this table, and as you can see I make the last arrow longer with loads of spaces. Is there a better way to make it as long as the other \plusarrows but at the same time with a centered text (only the equal sign)?

\documentclass[a4paper]{article}
\usepackage{amsmath}
\usepackage{ulem}
\usepackage{booktabs}

\newcommand{\plusarrow}{$\xrightarrow{+\Delta V \%}$}
\newcommand{\bmin}{\textbf{--}}

\begin{document}
\begin{table}[H]
    \centering
    \begin{tabular}{c l r c r}
        & \textbf{Ricavi} & 2000 & \plusarrow{} &
            \textbf{2140.00}\\
        \bmin{} & Costi operativi \dashuline{variabili} [660] & &
            \plusarrow{} & \textbf{706.20}\\
        & Acquisti materie prime & 150\\
        & Provvigioni passive & 180\\
        & Lavoro straordinario & 20\\
        & Lavorazioni esterne & 310\\
    \midrule
        = & \textbf{Margine di contribuzione} & 1340 & \plusarrow{} &
            \textbf{1433.80}\\
        \bmin{} & Costi operativi \dashuline{fissi} [860] & &
            $\xrightarrow{\ ~~=~~\ }$ & \textbf{860.00}\\ %% HERE
        & Lavoro ordinario & 420\\
        & Ammortamenti & 210\\
        & Affitti passivi & 90\\
        & Canoni di leasing & 140\\
    \midrule
    = & \textbf{Risultato operativo lordo} & 480 & & \textbf{573.80}
    \end{tabular}
\end{table}
\end{document}

This is the current result:
Table

While it is perfectly fine, I don't like the hack that I used to make it work.

Best Answer

Simple solution using

\newcommand{\foo}{\phantom{+\Delta V \%}}
\newcommand{\equalarrow}{%
   $\vphantom{\xrightarrow{=}}%
    \smash{\xrightarrow[\foo]{=‌}}%
   $}

Note that \equalarrow already contains $ $ in its definition. Also, I added the @Heiko's suggestion to adjust the vertical space created by the invisible content.

Related Solutions

[Tex/LaTex] Using aligned and align without amsmath

To avoid needing to edit the existing doc you can defined a poor man's aligned as follows (but first try to get the rules changed)

enter image description here

\documentclass{article}   
\usepackage{mathptmx}       
\usepackage{helvet}         
\usepackage{courier}        
\usepackage{type1cm}        

\usepackage{graphicx}        

\usepackage[bottom]{footmisc}

\usepackage{amssymb}
\usepackage{amsfonts}
\usepackage{amsbsy}
\usepackage{amscd}
\usepackage{amstext}
\usepackage{dsfont}
\usepackage[english]{babel}
\usepackage{color}
\usepackage{graphics}
\usepackage{epsfig}
\usepackage{subfigure}
\usepackage{wrapfig}
\usepackage{psfrag}
\usepackage{color}
\usepackage{url}
\usepackage{verbatim}
\usepackage{algorithm}
\usepackage{algorithmic}


\begin{document}
\def\aligned{\vcenter\bgroup\let\\\cr
\halign\bgroup&\hfil${}##{}$&${}##{}$\hfil\cr}
\def\endaligned{\crcr\egroup\egroup}

\begin{equation}
\label{InitSystemNL}
\left\{
\begin{aligned}
\mathcal{R} \colon= -\Delta u &= f  \quad & &\text{in} \,\, \Omega \\ u &= 0 \quad & &\text{on} \,\, \partial\Omega, 
\end{aligned} 
\right.
\end{equation}

\end{document}

[Tex/LaTex] Table with number but without caption

Adding \caption{} to a table adds an unwanted table separator to the caption. For example, you might end up with a caption:

Table 1:

You can control this, for example, with the package caption. For example:

\documentclass{article}

\usepackage{booktabs}
\usepackage[labelsep=none]{caption}

\begin{document}

\begin{table}
  \centering
  \begin{tabular}{cc}
    \toprule
    left number & right number \\
    \midrule
     5.6 &  3.8 \\
     1.3 & 20.4 \\
    10.4 &  5.2 \\
     1.3 &  0.8 \\
     7.2 &  3.9 \\
     2.5 & 16.2 \\
     \bottomrule
  \end{tabular}
  \caption{}
  \label{tab:tab}
\end{table}

Let's refer to Table~\ref{tab:tab}.

\end{document}

The caption now reads:

Table 1

If there are other tables that need an ordinary caption, you can use \captionsetup to temporarily change options. See the documentation for more details.

The package also contains further options to control the caption. For example, if you really want only the number (without "Table" in front) under the table, you can use:

\documentclass{article}

\usepackage{booktabs}
\usepackage[labelsep=none,labelformat=empty]{caption}

\begin{document}

\begin{table}
  \centering
  \begin{tabular}{cc}
    \toprule
    left number & right number \\
    \midrule
     5.6 &  3.8 \\
     1.3 & 20.4 \\
    10.4 &  5.2 \\
     1.3 &  0.8 \\
     7.2 &  3.9 \\
     2.5 & 16.2 \\
     \bottomrule
  \end{tabular}
  \caption{\ref{tab:tab}}
  \label{tab:tab}
\end{table}

Let's refer to table~\ref{tab:tab}.

\end{document}

Best Answer

Related Solutions

[Tex/LaTex] Using aligned and align without amsmath

[Tex/LaTex] Table with number but without caption

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