Create confusion matrix in Latex

Question

I want to Create confusion matrix 5x5 in Latex (overleaf), background same color blue.

I used this code:

\begin{tikzpicture}
    \begin{axis}[
            colormap={bluewhite}{color=(white) rgb255=(90,96,191)},
            xlabel=Predicted,
            xlabel style={yshift=-30pt},
            ylabel=Actual,
            ylabel style={yshift=20pt},
            xticklabels={W1, W2, W3, W4},
            xtick={0,...,3},
            xtick style={draw=none},
            yticklabels={W1, W2, W3, W4},
            ytick={0,...,3},
            ytick style={draw=none},
            enlargelimits=false,
            colorbar,
            xticklabel style={
              rotate=90
            },
            nodes near coords={\pgfmathprintnumber\pgfplotspointmeta},
            nodes near coords style={
                yshift=-7pt
            },
        ]
        \addplot[
            matrix plot,
            mesh/cols=4,
            point meta=explicit,draw=gray
        ] table [meta=C] {
            x y C
            0 0 0.96
            1 0 0.1
            2 0 0
            3 0 0
        0 1 0.1
        1 1 0.98
        2 1 1
        3 1 0.1

        0 2 0
        1 2 0
        2 2 0.97
        3 2 0.3

        0 3 0.3
        1 3 0
        2 3 0
        3 3 1

    };
\end{axis}

\end{tikzpicture}

But got this output:

How I can add fifth column ( W5)?

What have you tried? Could you edit into your question any code you have made trying to make this matrix please. — , Apr 10 '22 at 20:55
Does this answer your question? How to construct a confusion matrix in LaTeX? — Teepeemm, Apr 10 '22 at 21:43
It still feels like you've not tried. Even without understanding the code, I can get the fifth column without much effort. What is your understanding of the \addplot[]table{} macro? — Teepeemm, Apr 11 '22 at 13:18

score 3 · Accepted Answer · answered Apr 11 '22 at 17:13

I'm still confused about why you were confused. I essentially looked through the code for every "4" (or "3") and incremented. The only difficulty is that I couldn't have comments within the \addplot.

\documentclass{article}
\usepackage{tikz}
\usepackage{pgfplots}
\pgfplotsset{compat=1.17}
\begin{document}
\begin{tikzpicture}
    \begin{axis}[
            colormap={bluewhite}{color=(white) rgb255=(90,96,191)},
            xlabel=Predicted,
            xlabel style={yshift=-30pt},
            ylabel=Actual,
            ylabel style={yshift=20pt},
            xticklabels={W1, W2, W3, W4, W5}, % changed
            xtick={0,...,4}, % changed
            xtick style={draw=none},
            yticklabels={W1, W2, W3, W4, W5}, % changed
            ytick={0,...,4}, % changed
            ytick style={draw=none},
            enlargelimits=false,
            colorbar,
            xticklabel style={
              rotate=90
            },
            nodes near coords={\pgfmathprintnumber\pgfplotspointmeta},
            nodes near coords style={
                yshift=-7pt
            },
        ]
        \addplot[
            matrix plot,
            mesh/cols=5, % changed
            point meta=explicit,draw=gray
        ] table [meta=C] {
            x y C
            0 0 0.96
            1 0 0.1
            2 0 0
            3 0 0
            4 0 0
        0 1 0.1
        1 1 0.98
        2 1 1
        3 1 0.1
        4 1 0.02

        0 2 0
        1 2 0
        2 2 0.97
        3 2 0.3
        4 2 0

        0 3 0.3
        1 3 0
        2 3 0
        3 3 1
        4 3 0.01

        0 4 0
        1 4 0
        2 4 0.01
        3 4 0
        4 4 0.95

    }; % added every entry where x=4 or y=4
\end{axis}

\end{tikzpicture}
\end{document}

For an output of

Create confusion matrix in Latex

1 Answers1