tikz: Perfectly centering a graph paper drawing - TeX

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tikz: Perfectly centering a graph paper drawing

tikz add tag

Diaa

For the following, how can I perfectly center both vertically and horizontally the drawing since it seems to be slightly shifted up and left?

![texstudio_EfiTAz_1.jpg](/image?hash=152044873c58e2f951bf500fe7837515f313a722aea752080fd4d709e0625724)

```
\documentclass{article}
 
\usepackage{pgfplots}
\usepackage{siunitx}
\usepackage[type=none]{fgruler}
 
\usepackage[
a4paper , includeheadfoot , right = 10mm , left = 10mm , top = 0 mm, headheight = 0 mm, headsep = 5 mm, foot = 5 mm, bottom = 0 mm, showframe
]{geometry}
 
% http://tex.stackexchange.com/a/15002/100384
\newcommand*{\getlength}[2]{%
    % Convert to `cm` and round to two fractional digits:
    \pgfmathsetmacro#1{round(0.0351459804*#2)}%
}
 
\pagestyle{empty}
 
\begin{document}
    \vspace*{\fill}\vskip-\topskip
    \centering
    \begin{tikzpicture}
    \pgfmathsetmacro{\Hfactor}{0.95}% 0.9
    \pgfmathsetmacro{\Wfactor}{0.95}
    \getlength{\yMax}{\Hfactor*\textheight}
    \getlength{\xMax}{\Wfactor*\textwidth}
    \begin{axis}[
    set layers,
    width=\Wfactor\textwidth, height=\Hfactor\textheight,
    scale only axis, name=border,
    x = 1cm, y = 1cm,
    xtick={0,1,...,\xMax},
    ytick={0,1,...,\yMax},
    minor xtick={0,0.1,0.2,...,\xMax},
    minor ytick={0,0.1,0.2,...,\yMax},
    tick style = {line width = 0.6pt, black!40!white},
    minor tick style = {draw = none},
    major tick style = {draw = none},
    ticklabel style = {draw = none},
    xticklabels=\empty,
    yticklabels=\empty,
    axis line style = {-latex},
    grid = both,
    minor grid style={line width=0.2pt, black!20!white},
    major grid style={line width=0.6pt, black!60!white},
    ymin=0, ymax=\yMax,
    xmin=0, xmax=\xMax,
    ]
    \begin{pgfonlayer}{axis grid}
    \draw[line width=0.40pt, step=0.5cm, black!40!white] (axis cs: 0, 0) grid (axis cs: \xMax, \yMax);
    \end{pgfonlayer}
    \end{axis}
    %        \pgfresetboundingbox
    %        \path (border.south west) (border.north east);
    %        \draw[red] (current bounding box.south west) rectangle (current bounding box.north east);
    \end{tikzpicture}\vspace*{\fill}
    \fgruler{lowerleft}{10mm}{5mm}
    \fgruler{upperright}{10mm}{5mm}
\end{document}
```

Top Answer

Diaa

I received [an answer](https://tex.stackexchange.com/a/530044/2288) on TEX.SX as follows:

```
\documentclass[a4paper]{article}
\usepackage{pgfplots}
\usepackage{siunitx}
% http://tex.stackexchange.com/a/15002/100384
\newcommand*{\getlength}[2]{%
   % Convert to `cm` and round to two fractional digits:
   \pgfmathsetmacro#1{round(0.0351459804*#2)}%
}
\newsavebox{\gridbox}
\savebox\gridbox{\begin{tikzpicture}
    \pgfmathsetmacro{\width}{\paperwidth-2cm}
    \pgfmathsetmacro{\height}{\paperheight-2cm}
        % we will need some length in `cm`, without units, and rounded
        \getlength{\yMax}{\height}
        \getlength{\xMax}{\width}
        \begin{axis}[
            set layers,
            width=\width, height=\height,
            scale only axis, name=border,
            x = 1cm, y = 1cm,
            xtick={0,1,...,\xMax},
            ytick={0,1,...,\yMax},
            minor xtick={0,0.1,0.2,...,\xMax},
            minor ytick={0,0.1,0.2,...,\yMax},
            tick style = {line width = 0.6pt, black!40!white},
            minor tick style = {draw = none},
            major tick style = {draw = none},
            ticklabel style = {draw = none},
            xticklabels=\empty, %xlabel = \empty,
            yticklabels=\empty, %ylabel = \empty,
            axis line style = {-latex},
            grid = both,
            minor grid style={line width=0.2pt, black!20!white},
            major grid style={line width=0.6pt, black!60!white},
            ymin=0, ymax=\yMax,
            xmin=0, xmax=\xMax,
            ]
        %\begin{pgfonlayer}{axis grid}% redundant
        %\draw[line width=0.40pt, step=0.5cm, black!40!white] (axis cs: 0, 0) grid (axis cs: \xMax, \yMax);
        %\end{pgfonlayer}
        \end{axis}
    \pgfresetboundingbox
    \path (border.south west) (border.north east);
\end{tikzpicture}}
\pagestyle{empty}
\begin{document}
\begin{tikzpicture}[remember picture,overlay]
  \node at (current page.center) {\usebox\gridbox};
\end{tikzpicture}
\end{document}
```

Or

```
\documentclass[a4paper]{article}
\usepackage{pgfplots}
\usepackage{siunitx}
% http://tex.stackexchange.com/a/15002/100384
\newsavebox{\gridbox}
\savebox\gridbox{\begin{tikzpicture}
        % we will need some length in `cm`, without units, and rounded
		\pgfmathsetmacro{\xMax}{round((\paperwidth-2cm)/1cm)}
		\pgfmathsetmacro{\yMax}{round((\paperheight-2cm)/1cm)}
        \begin{axis}[
            set layers,
            width=\paperwidth-2cm, height=\paperheight-2cm,
            scale only axis, name=border,
            x = 1cm, y = 1cm,
            xtick={0,1,...,\xMax},
            ytick={0,1,...,\yMax},
            minor xtick={0,0.1,0.2,...,\xMax},
            minor ytick={0,0.1,0.2,...,\yMax},
            tick style = {line width = 0.6pt, black!40!white},
            minor tick style = {draw = none},
            major tick style = {draw = none},
            ticklabel style = {draw = none},
            xticklabels=\empty, %xlabel = \empty,
            yticklabels=\empty, %ylabel = \empty,
            axis line style = {-latex},
            grid = both,
            minor grid style={line width=0.2pt, black!20!white},
            major grid style={line width=0.6pt, black!60!white},
            ymin=0, ymax=\yMax,
            xmin=0, xmax=\xMax,
            ]
        %\begin{pgfonlayer}{axis grid}% redundant
        %\draw[line width=0.40pt, step=0.5cm, black!40!white] (axis cs: 0, 0) grid (axis cs: \xMax, \yMax);
        %\end{pgfonlayer}
        \end{axis}
    \pgfresetboundingbox
    \path (border.south west) (border.north east);
\end{tikzpicture}}
\pagestyle{empty}
\begin{document}
\begin{tikzpicture}[overlay,remember picture]
  \node at (current page.center) {\usebox\gridbox};
\end{tikzpicture}
\end{document}
```

this is a helpful prompt that we need a way to unlink SE accounts — that feature is now working. You'll need to (1) unlink the account that is linked to SE on your profile (2) link the same account on your mobile, then (3) ping me in here so I can merge the accounts.

I am writing now from my mobile browser, but the profile is anonymous since I joined before using cookies. If go to the anonymous profile and linked it to my text.sx account "Diaa", would it be merged into these of my PC browser and tex.sx?

When clicking on the `authenticate` button, I get this error `ERROR: SE user id is already linked to an account CONTEXT: PL/pgSQL function _error(integer,text) line 1 at RAISE SQL function "set_se_user_id" statement 3`

It depends on what you want. The first one converts the argument to the corresponding cm units, the second one rounds it in addition. If you want to convert, use the first one, if you want to have an integer grid the second one.

Thanks for the tip. Now I can have access to everyone account XD. I appreciate your help. One final thought: is it correct to use `\newcommand*{\getlengthcm}[2]{% \pgfmathsetmacro{#1}{#2/1cm}% }`? Or should I use `round(#2/1cm)`?

I can't log in to my original account since I haven't stored the pin :/. Anyway, would you please edit my answer or post another one to show me your approach of using `overlay` and pgf to convert pts to cm? Thanks in advance

I mean `\documentclass{article} \usepackage{pgf} \begin{document} \pgfmathsetmacro{\myrnd}{50*rnd}% \pgfmathsetmacro{\mycm}{\myrnd*1pt/1cm}% \myrnd pt is equal to \mycm cm. \end{document}`. You can divide any distance by 1cm, and then know how many cm this corresponds to.

I am so sorry, but I don't understand what you actually mean. For example, \newcommand*{\getlength}[2]{% % Convert to `cm` and round to two fractional digits: \pgfmathsetmacro#1{round(0.0351459804*#2)}% } converts to cm; would you please elaborate more your way of doing so?

If you cross-post the same question on multiple sites, please include links to each other in both posts. This will save users from their spending time on trying to solve your problems when they are already solved elsewhere.

1 Answer