How to remove values from HEATMAP

I have data which have 4 column 14 rows, every value in table represent {NO, MIN, MAJ, MOD, COL} you can see the table in attach excel file. For developing heatmap I have converted these value into numbers such as (NO=0, MIN=0.25, MOD=0.50, MAJ=075, COL=1). I have developed the heat map the code is given below. I have 2 doubts regarding this

A) How to remove the values from the heatmap?

B) How to replace the numeric value with again {NO, MIN, MAJ, MOD, COL}. Ans also how to create a colorbar which shows color change with label {NO, MIN, MAJ, MOD, COL}.

Basically these are damage states means its increasing from NO to COL

%MATLAB CODE
s = [0, 1, 2, 3.6];  
% file = "D:\OneDrive\WORK\VALID\value.xlsx";
file = "value.xlsx";
valueMap = containers.Map({'No', 'Min', 'Mod', 'Maj', 'Col'}, [0.00, 0.25, 0.5, 0.75, 1.00]);
tableData = readtable(file, 'ReadVariableNames', false);
numericData = zeros(size(tableData));
for i = 1:size(tableData, 1)
    for j = 1:size(tableData, 2)
        cellValue = char(tableData{i, j}); % Convert cell value to a string
        if isKey(valueMap, cellValue)
            numericData(i, j) = valueMap(cellValue);
        else
            numericData(i, j) = NaN; 
        end
    end
end
disp(numericData);

         0         0    0.2500    0.5000
         0         0    0.5000    0.5000
    0.2500    0.2500    0.5000    0.5000
    0.2500    0.2500    0.5000    0.5000
    0.2500    0.2500    0.7500    0.5000
    0.5000    0.5000    1.0000    1.0000
    0.7500    0.7500    1.0000    1.0000
    1.0000    1.0000    1.0000    1.0000
    1.0000    1.0000    1.0000    1.0000
    1.0000    1.0000    1.0000    1.0000
    1.0000    1.0000    1.0000    1.0000
    1.0000    1.0000    1.0000    1.0000
    1.0000    1.0000    1.0000    1.0000
    1.0000    1.0000    1.0000    1.0000

vel = [4 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5 6.75 7 7.25];
nColors = 256; % Number of colormap colors
customColormap = [linspace(1, 1, nColors)', linspace(0.8, 0, nColors)', linspace(0.8, 0, nColors)'];%RED
vel = fliplr(vel);
numericData = flipud(numericData);
h = heatmap(s, vel, numericData,'FontName', 'Times New Roman','fontsize',12);
colormap(customColormap);

Answer 1

[Voss]

I don't know of a way to alter the labels on a heatmap. What I would do in this situation is build a custom heatmap-looking plot using a patch object and text objects. Something like this:

% file = "D:\OneDrive\WORK\VALID\value.xlsx";
file = "value.xlsx";

s = [0, 1, 2, 3.6];
vel = [4 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5 6.75 7 7.25];

% NO=0, MIN=0.25, MOD=0.50, MAJ=0.75, COL=1
data_levels = [0, 0.25, 0.5, 0.75, 1];
data_labels = {'NO','MIN','MOD','MAJ','COL'};

tableData = readtable(file, 'ReadVariableNames', false);
[~,idx] = ismember(upper(table2array(tableData)),data_labels);
numericData = data_levels(idx);

% nColors = 256; % Number of colormap colors
nColors = numel(data_levels); % Number of colormap colors
customColormap = [ones(nColors,1), repmat(linspace(0.8, 0, nColors),2,1).'];%RED

edges = [-Inf (data_levels(1:end-1)+data_levels(2:end))/2 Inf];
color_idx = discretize(numericData,edges);

nan_idx = isnan(numericData);
if any(nan_idx,'all')
    nColors = nColors+1;
    customColormap = [0 0 0; customColormap];
    color_idx(nan_idx) = 0;
    color_idx = color_idx+1;
    cb_labels = [{'NaN'} data_labels];
else
    cb_labels = data_labels;
end
labels = cb_labels(color_idx);

x = 0:4;
y = [vel(1)+0.5*(vel(1)-vel(2)), ...
    (vel(1:end-1)+vel(2:end))/2, ...
    vel(end)+0.5*(vel(end)-vel(end-1))];
xd = repelem(x((1:end-1)+[0;1;1;0;0]),1,numel(y)-1);
yd = repmat(y((1:end-1)+[0;0;1;1;0]),1,numel(x)-1);

figure();

patch('XData',xd,'YData',yd,'FaceColor','flat', ...
    'FaceVertexCData',customColormap(color_idx,:))

[xt,yt] = meshgrid(x(1:end-1)+0.5,vel);
text(xt(:),yt(:),labels(:), ...
    'FontWeight','bold','HorizontalAlignment','center')

xlim(x([1 end]))
ylim(y([1 end]))
xticks(x(1:end-1)+0.5)
xticklabels(s)
yticks(vel)
set(gca(),'FontWeight','bold')

colormap(customColormap);
cb = colorbar();
cb.YTick = linspace(1/(2*nColors),1-1/(2*nColors),nColors);
cb.YTickLabel = cb_labels;

[Raj Arora]

Thanks Voss for your answer, However, I found a way to to the same.

[Voss]

You're welcome!

Please post your solution. I'm curious to see alternative methods for modifying heatmaps.