Im creating a nested treemap, but the output is giving different colors for the legend and treemap

close all;
clear all;
clc;

url = 'https://www.mathworks.com/matlabcentral/mlc-downloads/downloads/submissions/17192/versions/4/download/zip/treemap.zip';
savename = 'treemap.zip';
filestr = urlwrite(url, savename);
filenames = unzip(savename)

filenames = 1×13 cell array
  Columns 1 through 7

    {'treemap/plotRect…'}    {'treemap/treemap.m'}    {'treemap/html/tre…'}    {'treemap/html/tre…'}    {'treemap/html/tre…'}    {'treemap/html/tre…'}    {'treemap/html/tre…'}

  Columns 8 through 13

    {'treemap/html/tre…'}    {'treemap/html/tre…'}    {'treemap/outline.m'}    {'treemap/treemap_…'}    {'treemap/Contents…'}    {'license.txt'}

addpath( fileparts(filenames{1}) )

%Define a color palette
colorPalette = [0.9290 0.6940 0.1250; % yellow
    0 0.4470 0.7410;       % blue
    0.8500 0.3250 0.0980; % orange
    0.4940 0.1840 0.5560; % purple
    0.4660 0.6740 0.1880];% green
%Import the data to matlab 
data = {'Brighton & Hove','Books',610;'Brighton & Hove','Electronics',855;'Brighton & Hove','Hardware',998;'Brighton & Hove','Software',2020;'Chichester','Home & Garden',396;'Chichester','Health & Beauty',580;'Chichester','Sports ',613;'Chichester','Software',885;'Chichester','Electronics',891;'Chichester','DIY',1449;'Portsmouth','Books',268;'Portsmouth','Home & Garden ',390;'Portsmouth','Electronics',690;'Portsmouth','DIY',834;'Portsmouth','Sports',1008;'Portsmouth','Clothes',1016;'Portsmouth','Toys & Children',1201;'Southampton','DIY',169;'Southampton','Hardware',604;'Southampton','Electronics',757;'Southampton','Sports',1567;'Winchester','Hardware',524;'Winchester','Sports',541;'Winchester','Books',806;'Winchester','Software',991;'Winchester','Toys & Children',1079;'Winchester','Electronics',1661};
categories=unique(data(:,1));
numUniqueCategories=length(categories);
branches={'Brighton & Hove','Chichester','Portsmouth','Southampton','Winchester'};
numInstances = size(data, 1);
disp(['Number of instances: ' num2str(numInstances)]);

Number of instances: 27

array1 = zeros(numInstances,5); 
%disp(categories);
disp(numUniqueCategories);

     5

%for loop to store the values in array
for i =1:numUniqueCategories
    category_items = strcmp(data(:,1),categories{i});
    array1(category_items,i)=[data{category_items,3}];
    % for j=1:numInstances
    %      if strcmpi(strtrim(branches{i}), strtrim(data{j, 1}))
    %          array1(j,i)=cell2mat(data(j,3));
    %          %disp([num2str(array1(j, i))]);
    %      end
    % end
end
%disp(array1);
values = sum(array1,1); 
%create the outertree map 
outertree = treemap(values);
plotRectangles(outertree);
title('Sales by Branch');
% % Extract the unique entries in the second column for each main category
legend_labels = categories;
% Initialize legend colors
legend_colors = zeros(numUniqueCategories, 3);
disp(size(legend_colors));

     5     3

%for loop to create the inner tree 
for j=1:numUniqueCategories
    
    
    category_items = strcmp(data(:,1), categories{j});
    %create inner treemap
    innertree = treemap(array1(category_items, j), outertree(3, j), outertree(4, j));
    innertree(1,:)=innertree(1,:)+outertree(1,j);
    innertree(2,:)=innertree(2,:)+outertree(2,j);
    % Get the color for the current category
    categoryColor = colorPalette(mod(j-1, size(colorPalette, 1)) + 1, :);
    % Get the color for the current category
    %categoryColor = categoryColorMap(char(branches(j)));
    plotRectangles(innertree, data(category_items,2), repmat(categoryColor, size(innertree, 2), 1));
    outline(innertree);
    % Store colors for legend
    legend_colors(j,:) = categoryColor;
    
end

% Convert color values to strings in the correct format
legend_colors_norm = legend_colors / 255; % Normalize RGB values
% Convert color values to strings in the correct format
legend_colors_str = cell(numUniqueCategories, 1);
for i = 1:numUniqueCategories
    legend_colors_str{i} = sprintf('[%.3f, %.3f, %.3f]', legend_colors(i, :));
end
%plot the legend for the outer rectangle only
legend(legend_labels, 'color',legend_colors_norm,'Location', 'westoutside');

Error using legend
Error setting property 'Color' of class 'Legend':
Invalid RGB triplet. Specify a three-element vector of values between 0 and 1.

legend('boxoff'); % Turn off legend box
%labels = categories(:);
outline(outertree);
%axis([-0.02 1.01 -0.01 1.01])

Answer 1

[Walter Roberson]

legend() does not permit passing in an N x 3 array of legend colors.

legend() does not permit setting Color at all.

legend() permits setting TextColor -- but only as a single RGB triple that applies to all of the legends.

You need to record the output of legend(). Then you need to access the PlotChildren property, which will be an array of line() handles. You can set the Color property of the line handles (one RGB triple for each line... unless you know the magic incantation using cell arrays.)