به گمانم مثال پیوست را قبلا سرو عزیز وفا خلیقی نوشته بودند. من فقط رنگ سطرها را تغییر دادم:
\documentclass[a4paper]{article}
\usepackage{booktabs}
\usepackage[table]{xcolor}
\usepackage{xepersian}
\settextfont{Yas}
\makeatletter
\newbox\@slashboxa
\newbox\@slashboxb
\newbox\@slashboxc
\newcount\@slashboxwd
\newcount\@slashboxht
\newdimen\@slashsepl
\newdimen\@slashsepr
\def\slashbox{%
\def\@slashboxpicture##1{%
\put(0,0){\line(##1,1){\@slashboxwd}}%
\put(0,\@slashboxht){\makebox(0,0)[tl]{\box\@slashboxa}}%
\put(\@slashboxwd,0){\makebox(0,0)[br]{\box\@slashboxb}}%
}%
\@slashbox
}%
\def\backslashbox{%
\def\@slashboxpicture##1{%
\put(0,\@slashboxht){\line(##1,-1){\@slashboxwd}}%
\put(0,0){\makebox(0,0)[bl]{\box\@slashboxa}}%
\put(\@slashboxwd,\@slashboxht){\makebox(0,0)[tr]{\box\@slashboxb}}%
}%
\@slashbox
}%
\def\@slashbox{\@ifnextchar [{\@@slashbox}{\@@slashbox[0pt]}}
\def\@@slashbox[#1]{\@ifnextchar [{\@@@slashbox[#1]}{\@@@slashbox[#1][c]}}
\def\@@@slashbox[#1][#2]#3#4{%
% #1: width, #2: suppression of \tabcolsep on `l', `r', or `lr' side
% #3: left item, #4: right item
\@slashsepl=\tabcolsep
\@slashsepr=\tabcolsep
\@tfor\@tempa :=#2\do{\expandafter\let
\csname @slashsep\@tempa\endcsname=\z@}%
\setbox\@slashboxa=\hbox{\strut\hskip\tabcolsep\shortstack[l]{#3}}%
\setbox\@slashboxb=\hbox{\shortstack[r]{#4}\hskip\tabcolsep\strut}%
\setbox\@slashboxa=\hbox{\raise\dp\@slashboxa\box\@slashboxa}%
\setbox\@slashboxb=\hbox{\raise\dp\@slashboxb\box\@slashboxb}%
\setbox\@slashboxc=\hbox{%
\@tempdima=\wd\@slashboxa
\advance\@tempdima by \wd\@slashboxb
\advance\@tempdima by \@slashsepl
\advance\@tempdima by \@slashsepr
\@tempdimb=#1\relax%
\ifdim\@tempdimb>\@tempdima \@tempdima=\@tempdimb\fi%
\@tempdimb=\ht\@slashboxa
\advance\@tempdimb by \dp\@slashboxa
\advance\@tempdimb by \ht\@slashboxb
\advance\@tempdimb by \dp\@slashboxb
\@tempcnta=\@tempdima
\@tempcntb=\@tempdimb
\advance\@tempcnta by \@tempcntb
\advance\@tempcnta by -1
\divide\@tempcnta by \@tempcntb
\ifnum\@tempcnta>6 \@tempcnta=6
\@tempdimb=0.166666666\@tempdima
\else
\ifnum\@tempcnta<1 \@tempcnta=1\fi
\@tempdima=\@tempdimb
\multiply\@tempdima by \@tempcnta
\fi%
\advance\@tempdima by -\@slashsepl
\advance\@tempdima by -\@slashsepr
\@slashboxwd=\@tempdima
\@slashboxht=\@tempdimb
\@tempcntb=\@slashsepl
\setlength{\unitlength}{1sp}%
\begin{picture}(\@slashboxwd,\@slashboxht)(\@tempcntb,0)
\advance\@tempdima by \@slashsepl
\advance\@tempdima by \@slashsepr
\@slashboxwd=\@tempdima
\@slashboxpicture{\@tempcnta}
\end{picture}%
}%
$\vcenter{\box\@slashboxc}$%
}
\makeatother
\begin{document}
\begin{center}
\rowcolors{1}{white}{gray}
\begin{LTR}
\begin{tabular}{c|ccc|c}
\bottomrule
\backslashbox{$y$}{$x$}&$-1$&$0$&$1$&$f(y)$\\ \hline
$0$&$0$&$\frac{1}{3}$&$0$&$\frac{1}{3}$\\
$1$&$\frac{1}{3}$&$0$&$\frac{1}{3}$&$\frac{2}{3}$\\ \hline
$f(x)$&$\frac{1}{3}$&$\frac{1}{3}$&$\frac{1}{3}$&$1$\\
\bottomrule
\end{tabular}
\end{LTR}
\end{center}
\end{document}
تصویر خروجی به صورت زیر است فقط نمیدانم چطوری فایل اصلی تک را الصاق کنم:
