TeX - LaTeX Asked by Rashiq on May 31, 2021
I am trying to draw a TikZ diagram that I would like to start counting from zero instead of one. I have adapted this answer for my needs.
documentclass[tikz,border=3mm]{standalone}
usetikzlibrary{matrix}
begin{document}
begin{tikzpicture}[auto matrix/.style={matrix of nodes,
draw,thick,inner sep=0pt,
nodes in empty cells,column sep=-0.2pt,row sep=-0.2pt,
cells={nodes={minimum width=1.9em,minimum height=1.9em,
draw,very thin,anchor=center,fill=white,
execute at begin node={%
$vphantom{x_|}ifnumthepgfmatrixcurrentrow<4
ifnumthepgfmatrixcurrentcolumn<4
{#1}^{thepgfmatrixcurrentrow}_{thepgfmatrixcurrentcolumn}
else
ifnumthepgfmatrixcurrentcolumn=5
{#1}^{thepgfmatrixcurrentrow}_{N}
fi
fi
else
ifnumthepgfmatrixcurrentrow=5
ifnumthepgfmatrixcurrentcolumn<4
{#1}^{T}_{thepgfmatrixcurrentcolumn}
else
ifnumthepgfmatrixcurrentcolumn=5
{#1}^{T}_{N}
fi
fi
fi
fi
ifnumthepgfmatrixcurrentrowthepgfmatrixcurrentcolumn=14
cdots
fi
ifnumthepgfmatrixcurrentrowthepgfmatrixcurrentcolumn=41
vdots
fi
ifnumthepgfmatrixcurrentrowthepgfmatrixcurrentcolumn=44
ddots
fi$
}
}}}]
matrix[auto matrix=z,xshift=3em,yshift=3em](matz){
& & & &
& & & &
& & & &
& & & &
& & & &
};
matrix[auto matrix=y,xshift=1.5em,yshift=1.5em](maty){
& & & &
& & & &
& & & &
& & & &
& & & &
};
matrix[auto matrix=x](matx){
& & & &
& & & &
& & & &
& & & &
& & & &
};
draw[thick,-stealth] ([xshift=1ex]matx.south east) -- ([xshift=1ex]matz.south east)
node[midway,below] {$D$};
draw[thick,-stealth] ([yshift=-1ex]matx.south west) --
([yshift=-1ex]matx.south east) node[midway,below] {joints};
draw[thick,-stealth] ([xshift=-1ex]matx.north west)
-- ([xshift=-1ex]matx.south west) node[midway,above,rotate=90] {time};
end{tikzpicture}
end{document}
This code has the following output.
I would like the index to begin from zero. Something like this.
I tried using the calc package to subtract from the thepgfmatrixcurrentrow
and the thepgfmatrixcurrentcolumn
like $thepgfmatrixcurrentrow - 1 = result$
but to no avail. Any help is greatly appreciated.
You can use pgfmathtruncatemacro
to compute your desired numbers just before all the code into the matrix definition, and replace all thepgfmatrixcurrentrow
and thepgfmatrixcurrentcolumn
by your computed variables.
documentclass[tikz,border=3mm]{standalone}
usetikzlibrary{matrix}
begin{document}
begin{tikzpicture}[auto matrix/.style={matrix of nodes,
draw,thick,inner sep=0pt,
nodes in empty cells,column sep=-0.2pt,row sep=-0.2pt,
cells={nodes={minimum width=1.9em,minimum height=1.9em,
draw,very thin,anchor=center,fill=white,
execute at begin node={%
pgfmathtruncatemacro{nrow}{thepgfmatrixcurrentrow-1}%
pgfmathtruncatemacro{ncol}{thepgfmatrixcurrentcolumn-1}%
$vphantom{x_|}ifnumthepgfmatrixcurrentrow<4
ifnumthepgfmatrixcurrentcolumn<4
{#1}^{nrow}_{ncol}
else
ifnumthepgfmatrixcurrentcolumn=5
{#1}^{nrow}_{N}
fi
fi
else
ifnumthepgfmatrixcurrentrow=5
ifnumthepgfmatrixcurrentcolumn<4
{#1}^{T}_{ncol}
else
ifnumthepgfmatrixcurrentcolumn=5
{#1}^{T}_{N}
fi
fi
fi
fi
ifnumthepgfmatrixcurrentrowthepgfmatrixcurrentcolumn=14
cdots
fi
ifnumthepgfmatrixcurrentrowthepgfmatrixcurrentcolumn=41
vdots
fi
ifnumthepgfmatrixcurrentrowthepgfmatrixcurrentcolumn=44
ddots
fi$
}
}}}]
matrix[auto matrix=z,xshift=3em,yshift=3em](matz){
& & & &
& & & &
& & & &
& & & &
& & & &
};
matrix[auto matrix=y,xshift=1.5em,yshift=1.5em](maty){
& & & &
& & & &
& & & &
& & & &
& & & &
};
matrix[auto matrix=x](matx){
& & & &
& & & &
& & & &
& & & &
& & & &
};
draw[thick,-stealth] ([xshift=1ex]matx.south east) -- ([xshift=1ex]matz.south east)
node[midway,below] {$D$};
draw[thick,-stealth] ([yshift=-1ex]matx.south west) --
([yshift=-1ex]matx.south east) node[midway,below] {joints};
draw[thick,-stealth] ([xshift=-1ex]matx.north west)
-- ([xshift=-1ex]matx.south west) node[midway,above,rotate=90] {time};
end{tikzpicture}
end{document}
Correct answer by SebGlav on May 31, 2021
Since these are integers, use thenumexprpgfmatrixcurrentrow-1
documentclass[tikz,border=3mm]{standalone}
usetikzlibrary{matrix}
begin{document}
begin{tikzpicture}[auto matrix/.style={matrix of nodes,
draw,thick,inner sep=0pt,
nodes in empty cells,column sep=-0.2pt,row sep=-0.2pt,
cells={nodes={minimum width=1.9em,minimum height=1.9em,
draw,very thin,anchor=center,fill=white,
execute at begin node={%
$vphantom{x_|}ifnumthepgfmatrixcurrentrow<4
ifnumthepgfmatrixcurrentcolumn<4
{#1}^{thenumexprpgfmatrixcurrentrow-1}_{thenumexprpgfmatrixcurrentcolumn-1}
else
ifnumthepgfmatrixcurrentcolumn=5
,{#1}^{thenumexprpgfmatrixcurrentrow-1}_{N}
fi
fi
else
ifnumthepgfmatrixcurrentrow=5
ifnumthepgfmatrixcurrentcolumn<4
{#1}^{T}_{thenumexprpgfmatrixcurrentcolumn-1}
else
ifnumthepgfmatrixcurrentcolumn=5
,{#1}^{T}_{N}
fi
fi
fi
fi
ifnumthepgfmatrixcurrentrowthepgfmatrixcurrentcolumn=14
cdots
fi
ifnumthepgfmatrixcurrentrowthepgfmatrixcurrentcolumn=41
vdots
fi
ifnumthepgfmatrixcurrentrowthepgfmatrixcurrentcolumn=44
ddots
fi$
}
}}}]
matrix[auto matrix=z,xshift=3em,yshift=3em](matz){
& & & &
& & & &
& & & &
& & & &
& & & &
};
matrix[auto matrix=y,xshift=1.5em,yshift=1.5em](maty){
& & & &
& & & &
& & & &
& & & &
& & & &
};
matrix[auto matrix=x](matx){
& & & &
& & & &
& & & &
& & & &
& & & &
};
draw[thick,-stealth] ([xshift=1ex]matx.south east) -- ([xshift=1ex]matz.south east)
node[midway,below] {$D$};
draw[thick,-stealth] ([yshift=-1ex]matx.south west) --
([yshift=-1ex]matx.south east) node[midway,below] {joints};
draw[thick,-stealth] ([xshift=-1ex]matx.north west)
-- ([xshift=-1ex]matx.south west) node[midway,above,rotate=90] {time};
end{tikzpicture}
end{document}
I also added ,
in the last column to avoid too much overlapping.
Answered by egreg on May 31, 2021
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