Sometimes I need to type an arrow between nouns in my text, e.g.:
Foo $\rightarrow$ Bar $\rightarrow$ Baz
Is there any way to adjust the length of the arrow? I have tried with \scalebox but it also shrinks it vertically, while all I want is to control its length.
\documentclass[12pt]{article}
\begin{document}
Foo vv \parbox{.5cm}{\rightarrowfill} Bar $\rightarrow$ Baz
\end{document}
For lengths shorter than the default \rightarrow, you can go to TikZ:
\documentclass[12pt]{article}
\usepackage{tikz}
\begin{document}
\newcommand{\Arrow}[1]{%
\parbox{#1}{\tikz{\draw[->](0,0)--(#1,0);}}
}
Foo \Arrow{.1cm}Bar $\rightarrow$ Baz
\end{document}
Too many other arrow tips available to use with TikZ are possible, but, after all I suspect these tiny arrows will be readable.
$\rightarrow$. Hmm.
– Amelio Vazquez-Reina
Sep 28 '15 at 14:43
lasy font that might be made use of.
– barbara beeton
Sep 28 '15 at 15:31
\parbox? I'd use \makebox, instead, with a proper setting for the baseline.
– egreg
Sep 28 '15 at 17:20
makebox; height adjustment. I used \raisebox{.5\ht\strutbox} but it's higher than it should be. How much should I raise this?
– AboAmmar
Sep 28 '15 at 17:26
\makeatletter \DeclareRobustCommand{\Arrow}[1]{% \check@mathfonts \raisebox{\fontdimen22\textfont2}{\tikz{\draw[->](0,0)--(#1,0);}}% } \makeatother (You should be able to guess the line breaks.)
– egreg
Sep 28 '15 at 17:30
\usetikzlibrary{arrows.meta} would be certainly good.
– Manuel
Sep 28 '15 at 17:42
Implementing the suggestion by Barbara Beeton of using the arrow head in the lasy fonts, which is however smaller than the standard arrow head of \rightarrow. It shouldn't be a problem if you always use \Arrow.
\documentclass[12pt]{article}
\usepackage{pict2e,picture}
\makeatletter
\DeclareRobustCommand{\Arrow}[1][]{%
\check@mathfonts
\if\relax\detokenize{#1}\relax
\settowidth{\dimen@}{$\m@th\rightarrow$}%
\else
\setlength{\dimen@}{#1}%
\fi
\sbox\z@{\usefont{U}{lasy}{m}{n}\symbol{41}}%
\begin{picture}(\dimen@,\ht\z@)
\roundcap
\put(\dimexpr\dimen@-.7\wd\z@,0){\usebox\z@}
\put(0,\fontdimen22\textfont2){\line(1,0){\dimen@}}
\end{picture}%
}
\makeatother
\begin{document}
Foo \Arrow[.1cm] Bar $\rightarrow$ Baz
\Arrow\Arrow[1cm]\Arrow[.5cm]
$\rightarrow$
\end{document}
Here is a light weight approach, using no packages, and not even picture environment.
\documentclass{article}
\newcommand{\myarrow}[1][1cm]{\mathrel{%
\hbox{\rule[\dimexpr\fontdimen22\textfont2-.2pt\relax]{#1}{.4pt}}%
\mkern-4mu\hbox{\usefont{U}{lasy}{m}{n}\symbol{41}}}}
\makeatletter
\setbox0\hbox{$\xdef\scriptratio{\strip@pt\dimexpr
\numexpr(\sf@size*65536)/\f@size sp}$}
\newcommand{\myscriptarrow}[1][1cm]{{%
\hbox{\rule[\scriptratio\dimexpr\fontdimen22\textfont2-.2pt\relax]
{\scriptratio\dimexpr#1\relax}{\scriptratio\dimexpr.4pt\relax}}%
\mkern-4mu\hbox{\let\f@size\sf@size\usefont{U}{lasy}{m}{n}\symbol{41}}}}
\makeatother
\begin{document}
\[x-a\myarrow b_{c\myscriptarrow d-e}-f\]
\[x-a\myarrow[.5cm] b_{c\myscriptarrow[.5cm] d-e}-f\]
\[x-a\myarrow[1mm] b_{c\myscriptarrow[1mm] d-e}-f\]
\end{document}
As in other answers it implements @BarbaraBeeton's suggestion of using the arrow head in the lasy fonts. The length parameter or \myscriptarrow is automatically scaled, so it should be same as for \myarrow.
Equivalent result is obtained via shorter code which employs \vcenter:
\documentclass{article}
\newcommand{\myarrow}[1][1cm]{\mathrel{%
\vcenter{\hbox{\rule[-.2pt]{#1}{.4pt}}}%
\mkern-4mu\hbox{\usefont{U}{lasy}{m}{n}\symbol{41}}}}
\makeatletter
\setbox0\hbox{$\xdef\scriptratio{\strip@pt\dimexpr
\numexpr(\sf@size*65536)/\f@size sp}$}
\newcommand{\myscriptarrow}[1][1cm]{{%
\vcenter{\hbox{\rule[\scriptratio\dimexpr-.2pt\relax]
{\scriptratio\dimexpr#1\relax}{\scriptratio\dimexpr.4pt\relax}}}%
\mkern-4mu\hbox{\let\f@size\sf@size\usefont{U}{lasy}{m}{n}\symbol{41}}}}
\makeatother
\begin{document}
\[x-a\myarrow b_{c\myscriptarrow d-e}-f\]
\[x-a\myarrow[.5cm] b_{c\myscriptarrow[.5cm] d-e}-f\]
\[x-a\myarrow[1mm] b_{c\myscriptarrow[1mm] d-e}-f\]
\end{document}
The \myscriptarrow could use \mathrel. The sole effect (in script style for which it is destined) would be to suppress the small space separating from alarge symbol (\sum, \prod, ...) either immediately preceding or following.
The code for \myscriptarrow can be simplified if one removes the two \scriptratio which scale the rule thickness and vertical shift for centering (the one scaling the width must stay).
A better choice perhaps for the thickness is to use \fontdimen8 of the extension font.
\documentclass{article}
\newcommand{\myarrow}[1][1cm]{\mathrel{%
\vcenter{\hbox{\rule[-.5\fontdimen8\textfont3]{#1}{\fontdimen8\textfont3}}}%
\mkern-4mu\hbox{\usefont{U}{lasy}{m}{n}\symbol{41}}}}
\makeatletter
\setbox0\hbox{$\xdef\scriptratio{\strip@pt\dimexpr
\numexpr(\sf@size*65536)/\f@size sp}$}
\newcommand{\myscriptarrow}[1][1cm]{{%
\vcenter{\hbox{\rule[-.5\fontdimen8\scriptfont3]
{\scriptratio\dimexpr#1\relax}{\fontdimen8\scriptfont3}}}%
\mkern-4mu\hbox{\let\f@size\sf@size\usefont{U}{lasy}{m}{n}\symbol{41}}}}
\makeatother
\begin{document}
\[x-a\myarrow b_{c\myscriptarrow d-e}-f\]
\[x-a\myarrow[.5cm] b_{c\myscriptarrow[.5cm] d-e}-f\]
\[x-a\myarrow[1mm] b_{c\myscriptarrow[1mm] d-e}-f\]
\end{document}
[-.5\fontdimen8\textfont3] for the rule positioning. 2) in last version, the \scriptratio serves only for scaling width. It could be dropped then optional parameter gives exact width of script arrow.
\xrightarrow{\hspace{2cm}}(requiresamsmath) which gives an arrow a bit longer than 2cm. Do you know about\longrightarrow? – egreg Sep 28 '15 at 14:12\rightarrowI will try the solution with\xrightarrow– Amelio Vazquez-Reina Sep 28 '15 at 14:25