How can I start with colour a grid box? I want to draw below picture.
I had tried below. It is very hard to guess the node number.
\documentclass{article}
\usepackage{tikz}
\usepackage{subcaption}
\begin{document}
\begin{figure}
\centering
\captionsetup[subfigure]{skip=0pt} % to reduce space above subcaption
\begin{tikzpicture}
\draw[step=1cm,gray,very thin] (-2,-2) grid (2,2);
\node at (0,1,1) {6};
\node at (0,1,4) {6};
\end{tikzpicture}
\caption{stuff}
\end{figure}
\end{document}
I have no idea what you mean by "guess the node number". You are working in 2D here, so all coordinates should be given with only two numbers (x,y). Here I start the 4 by 4 grid with lower left corner at (0,0) - all else follows naturally:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\fill[yellow!20] (0,0) rectangle (2,2);
\fill[red!20] (0,2) rectangle (2,4);
%...
\draw[gray,very thin] (0,0) grid (4,4);
\node at (0.5,0.5) {1};
\node at (1.5,0.5) {2};
\node at (2.5,0.5) {3};
\node at (3.5,0.5) {4};
\node at (0.5,1.5) {3};
%...
\draw[-stealth,ultra thick] (5,2) --node[above] {max pool} (7,2);
\draw[gray,very thin] (8,1) grid (10,3);
\end{tikzpicture}
\end{document}
\fill[red!20] (0,0) rectangle (2,2);
– aan
Aug 12 '20 at 01:10
(8,1) and upper right corner at (10,3). Try: \fill[yellow!20] (8,1) rectangle (9,2);
– hpekristiansen
Aug 12 '20 at 01:48
\draw[] (-1.5,0.5) arc (10:300:-0.75cm) and is weird. Thanks
– aan
Aug 13 '20 at 01:48
The operative part of the grid coloring and putting data is as under --
{
\fill[yellow!20] (0,0) rectangle (2,2);%<----- the 0,0 corresponds to the coordinate
%system on the grid itself and 2,2 is
%the right upper corner of the
%rectangle
%The green!20 says 20% green mixed with white color
%Bonus you can now create circles at any desired location also
%Since each step is 1cm the circle radius as 1cm with red fill at coordinate 3,2
\fill[red!20] (3,2) circle (1cm);
\fill[green] (-2,-2) rectangle (0,0);
\fill[blue!20] (-2,0) rectangle (0,2);
\node at (0.5,0.5) {1};
\node at (-0.5,-0.5) {4};
}
The grid coordinates can now easily be read off from the grid itself with the excellent preamble created by @AndrewStacey at ---
https://tex.stackexchange.com/a/39698/197451
I think it was written to scare members!!
You could combine this with the excellent answer by @hpekristiansen for connecting with the right hand grid
\documentclass{article}
%\url{}
\usepackage{tikz}
\usetikzlibrary{arrows, fit, matrix, positioning, shapes, backgrounds,}
\makeatletter
\def\grd@save@target#1{%
\def\grd@target{#1}}
\def\grd@save@start#1{%
\def\grd@start{#1}}
\tikzset{
grid with coordinates/.style={
to path={%
\pgfextra{%
\edef\grd@@target{(\tikztotarget)}%
\tikz@scan@one@point\grd@save@target\grd@@target\relax
\edef\grd@@start{(\tikztostart)}%
\tikz@scan@one@point\grd@save@start\grd@@start\relax
\draw[minor help lines] (\tikztostart) grid (\tikztotarget);
\draw[major help lines] (\tikztostart) grid (\tikztotarget);
\grd@start
\pgfmathsetmacro{\grd@xa}{\the\pgf@x/1cm}
\pgfmathsetmacro{\grd@ya}{\the\pgf@y/1cm}
\grd@target
\pgfmathsetmacro{\grd@xb}{\the\pgf@x/1cm}
\pgfmathsetmacro{\grd@yb}{\the\pgf@y/1cm}
\pgfmathsetmacro{\grd@xc}{\grd@xa + \pgfkeysvalueof{/tikz/grid with coordinates/major step}}
\pgfmathsetmacro{\grd@yc}{\grd@ya + \pgfkeysvalueof{/tikz/grid with coordinates/major step}}
\foreach \x in {\grd@xa,\grd@xc,...,\grd@xb}
\node[anchor=north] at (\x,\grd@ya) {\pgfmathprintnumber{\x}};
\foreach \y in {\grd@ya,\grd@yc,...,\grd@yb}
\node[anchor=east] at (\grd@xa,\y) {\pgfmathprintnumber{\y}};
}
}
},
minor help lines/.style={
help lines,
step=\pgfkeysvalueof{/tikz/grid with coordinates/minor step}
},
major help lines/.style={
help lines,
line width=\pgfkeysvalueof{/tikz/grid with coordinates/major line width},
step=\pgfkeysvalueof{/tikz/grid with coordinates/major step}
},
grid with coordinates/.cd,
minor step/.initial=.2,
major step/.initial=1,
major line width/.initial=2pt,
}
\makeatother
\begin{document}
\begin{tikzpicture}
\draw[help lines,step=1cm] (-2,-2) grid (7,4);
\draw[help lines,line width=.6pt,step=1] (-2,-2) grid (7,4);
\foreach \x in {-2,-1,0,1,2,3,4,5,6,7}
\node[anchor=north] at (\x,-2) {\x};
\foreach \y in {-2,-1,0,1,2,3,4}
\node[anchor=east] at (-2,\y) {\y};
\scoped[on background layer]
{
\fill[yellow!20] (0,0) rectangle (2,2);
\fill[red!20] (3,2) circle (1cm);
\fill[green] (-2,-2) rectangle (0,0);
\fill[blue!20] (-2,0) rectangle (0,2);
\node at (0.5,0.5) {1};
\node at (-0.5,-0.5) {4};
}
\end{tikzpicture}
%
% \begin{tikzpicture}
% \draw (-2,-2) to[grid with coordinates] (7,4);
% \end{tikzpicture}
\end{document}
You could use matrix nodes instead of grids:
\documentclass[tikz, border=2mm]{standalone}
\usetikzlibrary{matrix, positioning, arrows.meta}
\begin{document}
\begin{tikzpicture}
\matrix[matrix of nodes,
column sep=-\pgflinewidth,
row sep=-\pgflinewidth,
nodes={anchor=center, minimum size=8mm, fill=red!30, draw}] (LeftMatrix)
{1 & 1 &|[fill=green!30]| 2 &|[fill=green!30]| 4\
5 & 6 &|[fill=green!30]| 7 &|[fill=green!30]| 8 \
|[fill=yellow!30]|3 &|[fill=yellow!30]| 2 &|[fill=blue!30]| 1 &|[fill=blue!30]| 0 \
|[fill=yellow!30]|1 &|[fill=yellow!30]| 2 &|[fill=blue!30]| 3 &|[fill=blue!30]| 4 \};
\draw[-{LaTeX}] ([xshift=2mm]LeftMatrix.east) -- node[above, align=left, font=\sffamily\small] {max pool with 2x2 filters\ and stride 2} ++(0:4cm) coordinate(aux);
\matrix[matrix of nodes,
column sep=-\pgflinewidth,
row sep=-\pgflinewidth,
nodes={anchor=center, minimum size=8mm, fill=red!30, draw}, right=5mm of aux] (RightMatrix)
{6 & |[fill=green!30]| 8\
|[fill=yellow!30]| 3 & |[fill=blue!30]| 4 \};
\end{tikzpicture}
\end{document}
