Cfxtrjtrk

From the answer to this question

When editing the elements of the matrix to become uneven in length, the display of the matrix becomes disturbed. How can this be solved

documentclass{beamer}

beamertemplatenavigationsymbolsempty

usepackage{verbatim}

usepackage{tikz}

usepackage{pgfplots}

usetikzlibrary{arrows, arrows.meta, positioning, calc, intersections, decorations.pathreplacing, decorations.pathmorphing, decorations.markings, shapes, shapes.misc, shapes.symbols, shapes.geometric, patterns, backgrounds, trees, shadows, fit,matrix}

begin{document}

begin{frame}[t,fragile]

frametitle{matrix}

begin{tikzpicture}

matrix (x) [matrix of nodes, row sep=10pt, column sep=10pt] {%

15.1 & 23.7 & 19.7 & 15.4 & 18.3 & 23.0\

17.4 & 18.6 & 12.9 & 20.3 & 13.7 & 21.4\

10.3 & 26.1 & 15.718.918.9 & 14.0 & 17.8 & 33.8\

23.2 & 12.9 & 29.8 & 18.3 & 14.2 & 20.8\

13.5 & 17.1 & 20.7 & 27.1 & 18.918.9 & 16.6\};

draw<2->[ultra thick, blue, latex'-] (x-2-1) node [fill, red!40!white, circle, inner sep=8pt, opacity=.4]{} -- (x-4-5) node [fill, blue!40!white, circle, inner sep=8pt, opacity=.4]{};

% Node names: (<name of matrix>-<row>-<column>)

foreach i in {1,...,6} 

draw ($(x-1-i.north west)+(-5pt,5pt)$) -- ($(x-5-i.south west)+(-5pt,-5pt)$);%vertical lines

foreach i in {1,...,5} 

draw ($(x-i-1.south west)+(-5pt,-5pt)$) -- ($(x-i-6.south east)+(5pt,-5pt)$);%horizontal lines

draw ($(x-1-1.north west)+(-5pt,5pt)$) -| ($(x-5-6.south east)+(5pt,-5pt)$);%upper and right borders

end{tikzpicture}

end{frame}

end{document}

One can use the fit library to always draw the lines between the tallest/widest matrix entries. I added a style full matrix grid which can be used as

draw[matrix name=x,matrix cols=6,matrix rows=5,full matrix grid];

If you want to draw only a subset of vertical or horizontal lines, you can use the redefined vlines or hlines styles, which now also use fit.

documentclass{beamer}

beamertemplatenavigationsymbolsempty

usepackage{verbatim}

usepackage{tikz}

usetikzlibrary{arrows,calc,fit,matrix}

tikzset{matrix rows/.initial=5,matrix cols/.initial=6,matrix name/.initial=x,

vline/.style={/utils/exec=foreach XX in {1,...,pgfkeysvalueof{/tikz/matrix rows}}

{ifnumXX=1

xdefMatLstA{(pgfkeysvalueof{/tikz/matrix name}-XX-#1)}

xdefMatLstB{(pgfkeysvalueof{/tikz/matrix name}-XX-thenumexpr1+#1relax)}

else

xdefMatLstA{MatLstA (pgfkeysvalueof{/tikz/matrix name}-XX-#1)}

xdefMatLstB{MatLstB (pgfkeysvalueof{/tikz/matrix name}-XX-thenumexpr1+#1relax)}

fi},

insert path={node[fit=MatLstA,inner sep=0pt] (fitA) {}

node[fit=MatLstB,inner sep=0pt] (fitB) {}

($(fitA.east)!0.5!(fitB.west)$) coordinate (aux) 

(pgfkeysvalueof{/tikz/matrix name}.north-|aux) -- (pgfkeysvalueof{/tikz/matrix name}.south-|aux)}},

hline/.style={/utils/exec=foreach XX in {1,...,pgfkeysvalueof{/tikz/matrix cols}}

{ifnumXX=1

xdefMatLstA{(pgfkeysvalueof{/tikz/matrix name}-#1-XX)}

xdefMatLstB{(pgfkeysvalueof{/tikz/matrix name}-thenumexpr1+#1relax-XX)}

else

xdefMatLstA{MatLstA (pgfkeysvalueof{/tikz/matrix name}-#1-XX)}

xdefMatLstB{MatLstB (pgfkeysvalueof{/tikz/matrix name}-thenumexpr1+#1relax-XX)}

fi},insert path={node[fit=MatLstA,inner sep=0pt] (fitA) {}

node[fit=MatLstB,inner sep=0pt] (fitB) {}

($(fitA.south)!0.5!(fitB.north)$) coordinate (aux) 

(pgfkeysvalueof{/tikz/matrix name}.west|-aux) -- (pgfkeysvalueof{/tikz/matrix

name}.east|-aux)}},

full matrix grid/.style={vline/.list={1,...,thenumexprpgfkeysvalueof{/tikz/matrix

cols}-1},hline/.list={1,...,thenumexprpgfkeysvalueof{/tikz/matrix rows}-1},

insert path={(pgfkeysvalueof{/tikz/matrix name}.south west) rectangle

(pgfkeysvalueof{/tikz/matrix name}.north east)}}}

begin{document}

begin{frame}[t,fragile]

frametitle{matrix}

begin{tikzpicture}

matrix (x) [matrix of nodes, row sep=10pt, column sep=10pt] {%

15.1 & 23.7 & 19.7 & 15.4 & 18.3 & 23.0\

17.4 & 18.6 & 12.9 & 20.3 & 13.7 & 21.4\

10.3 & 26.1 & 15.718.918.9 & 14.0 & 17.8 & 33.8\

23.2 & 12.9 & 29.8 & 18.3 & 14.2 & 20.8\

13.5 & 17.1 & 20.7 & 27.1 & 18.918.9 & 16.6\};

draw<2->[ultra thick, blue, latex'-] (x-2-1) node [fill, red!40!white, circle, inner sep=8pt, opacity=.4]{} -- (x-4-5) node [fill, blue!40!white, circle, inner sep=8pt, opacity=.4]{};

% Node names: (<name of matrix>-<row>-<column>)

% draw[vline/.list={1,...,5},hline/.list={1,...,4}] (pgfkeysvalueof{/tikz/matrix name}.north west) rectangle 

%  (pgfkeysvalueof{/tikz/matrix name}.south east); % 

draw[matrix name=x,matrix cols=6,matrix rows=5,full matrix grid]; % 



end{tikzpicture}

end{frame}

end{document}

P.S. The outer lines can be drawn with draw, too.