Rendering issues with bar3

[xarico10]

There are rendering issues when using bar3() to create 3-D bar charts.

load count.dat
Z = count(1:10,:);
figure
bar3(Z,'r')
title('Detached Style')

fig2plotly(gcf, 'offline', false)

The bars aren't rendering correctly and the coloring seems to follow a heat map format when it should be just red.

Expected and generated (https://chart-studio.plotly.com/~xarico10/595/detached-style/#/) plots:

Examples on using bar3() can be found on:
https://www.mathworks.com/help/matlab/ref/bar3.html#responsive_offcanvas

[nouman-tariq]

I was not able to completely solve this issue, but some of it

this code will resolve the color problem of the above issue with little modifications in the updateSurfaceplot.m file

%-------------------------------------------------------------------------%

bar3 = false;

try
    if (isfield(image_data, 'Tag') && strcmp(image_data.Tag, 'bar3'))
        bar3 = true;
    end
catch
    %TODO
end

%-------------------------------------------------------------------------%

%-------------------------------------------------------------------------%

%-image colorscale-%

cmap = figure_data.Colormap;
len = length(cmap)-1;

if bar3
    faceColor = image_data.FaceColor;
    if isnumeric(faceColor)
        color = 255*faceColor;
        for c = 1: length(cmap)
            obj.data{surfaceIndex}.colorscale{c} = { (c-1)/len , ['rgb(' num2str(color(1)) ',' num2str(color(2)) ',' num2str(color(3)) ')'  ]  };
        end
    else
        switch faceColor
            case 'none'
                color = [255, 255, 255]; %TODO
                for c = 1: length(cmap)
                    obj.data{surfaceIndex}.colorscale{c} = { (c-1)/len , ['rgb(' num2str(color(1)) ',' num2str(color(2)) ',' num2str(color(3)) ')'  ]  };
                end
            case 'flat'
                scalefactor = (surfaceIndex - figure_data.CurrentAxes.CLim(1))/diff(figure_data.CurrentAxes.CLim);
                color =  255*(cmap(1 + floor(scalefactor*(length(cmap)-1)),:));
                for c = 1: length(cmap)
                    obj.data{surfaceIndex}.colorscale{c} = { (c-1)/len , ['rgb(' num2str(color(1)) ',' num2str(color(2)) ',' num2str(color(3)) ')'  ]  };
                end
        end
    end
    
else
    for c = 1: length(cmap)
        col = 255 * cmap(c, :);
        obj.data{surfaceIndex}.colorscale{c} = { (c-1)/len , ['rgb(' num2str(col(1)) ',' num2str(col(2)) ',' num2str(col(3)) ')'  ]  };
    end
end

and this code will fix the bar positions in the same file-

%-aspect ratio-%
ar = obj.PlotOptions.AspectRatio;

if ~isempty(ar)
    if ischar(ar)
        obj.layout.scene.aspectmode = ar;
    elseif isvector(ar) && length(ar) == 3
        xar = ar(1);
        yar = ar(2);
        zar = ar(3);
    end
else

    %-define as default-%
    xar = max(x(:));
    yar = max(y(:));
    zar = 0.7*max([xar, yar]);
end

obj.layout.scene.aspectratio.x = xar;
obj.layout.scene.aspectratio.y = yar;
obj.layout.scene.aspectratio.z = zar;

%---------------------------------------------------------------------%

%-camera eye-%
ey = obj.PlotOptions.CameraEye;

if ~isempty(ey)
    if isvector(ey) && length(ey) == 3
        obj.layout.scene.camera.eye.x = ey(1);
        obj.layout.scene.camera.eye.y = ey(2);
        obj.layout.scene.camera.eye.z = ey(3);
    end
else

    %-define as default-%
    xey = - xar; if xey>0 xfac = -0.2; else xfac = 0.2; end
    yey = - yar; if yey>0 yfac = -0.2; else yfac = 0.2; end
    if zar>0 zfac = 0.2; else zfac = -0.2; end
    
    obj.layout.scene.camera.eye.x = xey + xfac*xey; 
    obj.layout.scene.camera.eye.y = yey + yfac*yey;
    obj.layout.scene.camera.eye.z = zar + zfac*zar;
end
% 
% xey = figure_data.CurrentAxes.DataAspectRatio(1);
% yey = figure_data.CurrentAxes.DataAspectRatio(2);
% zey = figure_data.CurrentAxes.DataAspectRatio(3);
%---------------------------------------------------------------------%

(help taken from the other functions)

[gilbertogalvis]

This issue was fixed y PR #373.

Attach results bellow (examples in https://github.com/plotly/ssim_baselines/tree/main/matlab/code-examples/discrete-data-plots/bar3)