Display a list as node label

Question

I would like to have the same result as the following picture

My current result:

I thought that I could use \n to get the right item in the list Mylist, but I didn't find how to get an item in a list. Any idea?

My code:

%%%%%%%%%%%%%%%%%% PACKAGE %%%%%%%%%%%%%%%%%%
\usepackage[utf8]{inputenc} 
\usepackage[T1]{fontenc}
\usepackage{tgadventor}
\usepackage{sansmath}
\usepackage[usenames, dvipsnames]{xcolor}
\usepackage{tikz}
%%%%%%%%%%%%%%%%%% INPUT %%%%%%%%%%%%%%%%%%
%\input{preamble.tex}
%\input{parameters.tex}

%\input{types/f2d_fig}
%%%%%%%%%%%%%%%%%% SETUP %%%%%%%%%%%%%%%%%%
\tikzset{graphtikz/.style={font={\sansmath\sffamily\large}, line width=0.4mm, line cap=round, line join=round, >=latex, x=1.0cm, y=1.0cm,}}

\def\MyList{A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Z}

%%%%%%%%%%%%%%%%%% DOCUMENT %%%%%%%%%%%%%%%%%%
\begin{document}
\begin{tikzpicture}[graphtikz, font={\sansmath\sffamily\Large}, scale=1]
    %%%     vertical segment
    \foreach \x in {0,...,5}    
        {
        \draw[shift={(\x*2,0)},color=black!80] (0,0) -- (0,11.5);
        }
    %%%     horizontal segment
    \foreach \x in {0,...,3}
        {
        \draw[shift={(0,\x*2)},color=black!80] (28:-0.5) -- (0,0) -- (10,5) -- +(28:0.5);
        }
    %%%     Node
    \foreach \y in {0,...,3}
        {
        \foreach \x in {0,...,5}
            {
            \def\n{(\y*6)+\x}
            \draw 
            (\x*2,\y*2+\x) node[above left,] {\n};
            }
        }
\end{tikzpicture}
\end{document}

Answer 1

Like this? It is not necessary to define \MyList, you can use a \Alph{<counter>} here. And of course the counter has to increase with decreasing \y.

\documentclass[border=3mm]{standalone}
\usepackage[utf8]{inputenc} 
\usepackage[T1]{fontenc}
\usepackage{tgadventor}
\usepackage{sansmath}
\usepackage[usenames, dvipsnames]{xcolor}
\usepackage{tikz}
%%%%%%%%%%%%%%%%%% INPUT %%%%%%%%%%%%%%%%%%
%\input{preamble.tex}
%\input{parameters.tex}

%\input{types/f2d_fig}
%%%%%%%%%%%%%%%%%% SETUP %%%%%%%%%%%%%%%%%%
\tikzset{graphtikz/.style={font={\sansmath\sffamily\large}, line width=0.4mm, line cap=round, line join=round, >=latex, x=1.0cm, y=1.0cm,}}

%\def\MyList{A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Z}
\newcounter{iaux}
%%%%%%%%%%%%%%%%%% DOCUMENT %%%%%%%%%%%%%%%%%%
\begin{document}
\begin{tikzpicture}[graphtikz, font={\sansmath\sffamily\Large}, scale=1]
    %%%     vertical segment
    \foreach \x in {0,...,5}    
        {
        \draw[shift={(\x*2,0)},color=black!80] (0,0) -- (0,11.5);
        }
    %%%     horizontal segment
    \foreach \x in {0,...,3}
        {
        \draw[shift={(0,\x*2)},color=black!80] (28:-0.5) -- (0,0) -- (10,5) -- +(28:0.5);
        }
    %%%     Node
    \foreach \y in {0,...,3}
        {
        \foreach \x in {0,...,5}
            {
            \pgfmathtruncatemacro{\iaux}{((3-\y)*6)+\x+1}
            \setcounter{iaux}{\iaux}
            \draw 
            (\x*2,\y*2+\x) node[above left,] {\Alph{iaux}};
            }
        }
\end{tikzpicture}
\end{document}

If you want to work with your list, you need to wrap the entries into quotes. You can either do that by hand or let LaTeX do it for you.

\documentclass[border=3mm]{standalone}
\usepackage[utf8]{inputenc} 
\usepackage[T1]{fontenc}
\usepackage{tgadventor}
\usepackage{sansmath}
\usepackage[usenames, dvipsnames]{xcolor}
\usepackage{tikz}
%%%%%%%%%%%%%%%%%% INPUT %%%%%%%%%%%%%%%%%%
%\input{preamble.tex}
%\input{parameters.tex}

%\input{types/f2d_fig}
%%%%%%%%%%%%%%%%%% SETUP %%%%%%%%%%%%%%%%%%
\tikzset{graphtikz/.style={font={\sansmath\sffamily\large}, line width=0.4mm, line cap=round, line join=round, >=latex, x=1.0cm, y=1.0cm,}}

\def\MyList{A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Z}
% from https://tex.stackexchange.com/a/225192
\def\addquotes#1,#2\relax{"#1",\if\relax#2\relax\else\addquotes#2\relax\fi}

%%%%%%%%%%%%%%%%%% DOCUMENT %%%%%%%%%%%%%%%%%%
\begin{document}
\begin{tikzpicture}[graphtikz, font={\sansmath\sffamily\Large}, scale=1]
    %%%     vertical segment
    \foreach \x in {0,...,5}    
        {
        \draw[shift={(\x*2,0)},color=black!80] (0,0) -- (0,11.5);
        }
    %%%     horizontal segment
    \foreach \x in {0,...,3}
        {
        \draw[shift={(0,\x*2)},color=black!80] (28:-0.5) -- (0,0) -- (10,5) -- +(28:0.5);
        }
    %%%     Node
    \foreach \y in {0,...,3}
        {
        \foreach \x in {0,...,5}
            {
            \pgfmathtruncatemacro{\iaux}{((3-\y)*6)+\x+1}
            \pgfmathsetmacro\mychar{{\expandafter\addquotes\MyList,\relax}[\iaux-1]}%
            \draw 
            (\x*2,\y*2+\x) node[above left,] {\mychar};
            }
        }
\end{tikzpicture}
\end{document}