How to plot number of a matrix with colorcode? (2024)

What exactly do you want? When you say "plot it with specific color against depth", you realize that the result for each category will be constant-valued, right?

I'm assuming you want something other than this. Maybe something like this?

Not that I think that's particularly readable either.

thank you for your answer. But I want to plot these number with depth value (1st column). Depth will be in Y-axis. And the numbers will be plotted as color.

A = xlsread('Book1.xlsx');

w = 100;

h = pcolor(1:w,A(:,1),repmat(A(:,2),[1 w]));

set(h,'edgecolor','none')

set(gca,'ydir','reverse','xticklabel',{})

axis equal

xlim([1 w])

cmap = [0 1 0; 0 0 0; 0 1 1; 1 0 0; 0 0 1; 1 1 0];

colormap(cmap)

• Link

  Direct link to this comment

  https://matlabcentral.mathworks.com/matlabcentral/answers/1612075-how-to-plot-number-of-a-matrix-with-colorcode#comment_1890085

• Link

  Direct link to this comment

  See Also

  Scatter chart appearance and behavior

  https://matlabcentral.mathworks.com/matlabcentral/answers/1612075-how-to-plot-number-of-a-matrix-with-colorcode#comment_1890240

• Link

  Direct link to this comment

  https://matlabcentral.mathworks.com/matlabcentral/answers/1612075-how-to-plot-number-of-a-matrix-with-colorcode#comment_1890285

filename = 'https://www.mathworks.com/matlabcentral/answers/uploaded_files/835655/Book1.xlsx';

A = readmatrix(filename);

N = size(A,1);

pointsize = 25;

cmap = [0 1 0; 0 0 0; 0 1 1; 1 0 0; 0 0 1; 1 1 0];

scatter(1:N, A(:,1), pointsize, A(:,2));

colormap(cmap);

colorbar()

ylabel('Depth')

xlabel('row number')

scatter(A(:,2), A(:,1), pointsize, A(:,2))

colormap(cmap)

xlabel('category')

ylabel('Depth')

boxplot(A(:,1), A(:,2))

xlabel('category')

ylabel('depth')

A = xlsread('Book1.xlsx');

uv = unique(A(:,2));

hold on

for k = 1:numel(uv)

mask = A(:,2) == uv(k);

plot(A(mask,1));

end

cmap = [0 1 0; 0 0 0; 0 1 1; 1 0 0; 0 0 1; 1 1 0];

set(gca,'colororder',cmap)

ylabel('depth')

xlabel('sample number')