Zdata(N,1) to RGB Cdata(N,1,1:3)

Question

Arthur Allen 2013-3-19

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/67820-zdata-n-1-to-rgb-cdata-n-1-1-3

I have lat, long, and skill vectors. All vectors are (n,1). (skill ranges from 0.0 to 1.0)

    for j = 1:n_validlength;
        plotm(Lat_NCOMwCodar(j),Lon_NCOMwCodar(j),0,'Marker','s','MarkerSize',12,...
           'MarkerFaceColor',skill_color_NCOMatCodar(j,jj,:));
    end

where skill_color_NCOMatCodar(j,jj,1:3) is colormap('jet') from skill_NCOMatCodar(j,jj)

How to set the relationship between SKILL(n,jj) range 0.0 to 1.0 to SKILL_COLOR(n,jj,1:3) ?

I can not use contourm, geoshowm, because data is not at i,j mesh, image. Ilregular grids are used.

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Answer 1

Arthur Allen 2013-3-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/67820-zdata-n-1-to-rgb-cdata-n-1-1-3#answer_79261

在 MATLAB Online 中打开

Solved my own question:

cmap_jet = colormap(jet(64)); % used colormap 'jet' with 64 colors

for j = 1:n

        if skill(j) == 0;
              skill_color(j,:) = ([0 0 0]);  % set to black
          else
% return index from 1 to 64 based upon skill level (data) from 0.0 to 1.0
%  note: skill.*number_of_colors_in_colormap
%  note: goal: return indexes from 1 to 64 starting with data range.
            skill_color_idx(j) = uint8(ceil(skill(j).*64));
% now return cmap_jet row :RGB as color of skill
            skill_color(j,:) = cmap_jet(skill_color_idx(j),:); % jet colors
        end
    end