How to cross a row in matrix with a line?

Question

Is there an "easy" way to cross the row in a matrix with a line? I am trying to demonstrate to my students how to type in LaTeX their homework assignment on Boolean function. The below table is used during the construction of normal conjunctive and disjunctive form of a Boolean function. This is a "hand" made example.

Jean-Christophe Dubacq · Accepted Answer

You can use tikz for this. Probably not the finest answer possible, but works for me:

documentclass{article}
usepackage{tikz}
newcommand{pmark}[1]{begin{tikzpicture}[overlay,remember picture]node(#1)at (-1em,.7ex){};end{tikzpicture}}
newcommand{smark}[1]{begin{tikzpicture}[overlay,remember picture]draw(#1)--(0,.7ex);end{tikzpicture}}
begin{document}
$$begin{array}{cccc|c}
a&b&bc&d&fhline
0pmark{a}&0&1&1&1smark{a}
0&0&0&1&0
0&0&1&1&1
end{array}$$
$f=overline{a}wedgeoverline{b}wedge cwedge+dots$
end{document}

F. Pantigny · Answer

With nicematrix, you can write a command Cross to use in each row you want to cross. You will be able to use that command in the environments of nicematrix ({NiceTabular}, {pNiceMatrix}, etc.) which are similar to the classical environments (of the packages array and amsmath).
documentclass{article}
usepackage{nicematrix}
usepackage{tikz}

ExplSyntaxOn
NewDocumentCommand { Cross } { }
  {
    tl_gput_right:Nx g_nicematrix_code_after_tl
      { __pantigny_cross:n { int_use:c { c@iRow } } }
  }
cs_new_protected:Nn __pantigny_cross:n 
  {
    tikz 
    draw [red, shorten~> = -3pt, shorten~< = -3pt] 
      ( #1-1-medium .west ) -- ( #1- int_use:c { c@jCol } - medium .east ) ;
  }
ExplSyntaxOff

begin{document}

begin{NiceTabular}{cccc}[create-medium-nodes]
$p$ & $q$ & $r$ & $f$ 
hline
0 & 0 & 0 & 0 Cross 
0 & 0 & 1 & 1 
0 & 1 & 0 & 1 
0 & 1 & 1 & 0 Cross 
1 & 0 & 0 & 0 
1 & 1 & 0 & 0 
1 & 1 & 1 & 1 
end{NiceTabular}

end{document}

The use of the medium nodes ensures horizontal lines.
We have to compile several times (because nicematrix uses PGF/Tikz nodes).

How to cross a row in matrix with a line?

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