MATLAB: R2019b tiled layout

MATLABplotting

Hi everybody,

I was playing with the new tiledlayout function.

But if you deviate from the default settings the colorbar looks strange.

Any ideas how to fix that? I tried to manipulate the colorbar position property but this yielded missing references to the colorbar object.

t = tiledlayout(1,2)
t.TileSpacing = 'compact';
nexttile
imagesc(rand(16))
axis image
colorbar
title('1')
nexttile
imagesc(rand(16))
axis normal
colorbar
title('2')

Best Answer

"the colorbar looks strange"

I assume you mean that the colorbar size doesn't scale with the axis size after applying axis image. This should probably be addressed by The MathWorks but in the mean time, you could use subplot() to define your axes and the colobars will scale to the axis size.

subplot(2,2,1)
imagesc(rand(16))
axis image
colorbar
title('1')
subplot(2,2,2)
imagesc(rand(16))
axis normal
colorbar
title('2')

Related Solutions

MATLAB: How to add one colorbar for the whole figure with tiled layout

To use one colorbar that represents the color values for each subplot, each subplot must use the same colormap and the same colorscale. The colorbar can be assigned to just one of the subplots or it can be a global colorbar assigned to the tiledlayout object.

Here's a demo.

tlo = tiledlayout(2,1)
tlo = 
  TiledChartLayout with properties:

    TileArrangement: 'fixed'
           GridSize: [2 1]
            Padding: 'loose'
        TileSpacing: 'loose'

  Show all properties
% Top plot
h(1) = nexttile(tlo);      % Get axis handle 
surf(h(1), peaks)
% Bottom plot
h(2) = nexttile(tlo);        % Get 2nd axis handle
surf(h(2), peaks * 2.5)
% Set colormap and color limits for all subplots
set(h, 'Colormap', jet, 'CLim', [-20 20])
% assign color bar to one tile 
cbh = colorbar(h(end)); 
% To position the colorbar as a global colorbar representing
% all tiles, 
cbh.Layout.Tile = 'east';

If the subplots were produced using subplot(), you can reposition the colorbar so that it is not associated with just one subplot. This example places the subplot the right of the figure, centered vertically.

 % Reposition to figure's left edge, centered vertically
  cbh.Position(1) = .95-cbh.Position(3);
  cbh.Position(2) = 0.5-cbh.Position(4)/2;
 % decrease horizontal extent of subplots to 92% of their current width
  set(h, {'Position'}, mat2cell(vertcat(h.Position) .* [1 1 .92, 1], ones(size(h(:))),4))

MATLAB: Subplot aligment automatic method

Method 1: equate axis sizes for all axes after adding colorbar

Size of axes without a colorbar will be set to the size of axes with a colorbar.

% Create Demo
ax = gobjects(2,3); 
for i = 1:5
    ax(i) = subplot(3,2,i);
    imagesc(ax(i),rand(100,1000))
    colorbar(ax(i))
end
ax(end) = subplot(3,2,6);
plot(ax(end), 1:1000,(1:1000).*rand(1,1000)*2)
% Set the width and height of all axes to the min width & height
allAxPos = vertcat(ax.Position);
allAxPos(:,3:4) = min(allAxPos(:,3:4)).*ones(numel(ax),1);
set(ax,{'position'},mat2cell(allAxPos,ones(numel(ax),1),4))

Method 2: Restore axis position and set colobar positions

The axes maintain their original sizes prior to adding colorbar. The colorbar position and width is adjusted.

function addOutsideColorbar(ax)
pos = ax.Position; 
cb = colorbar(ax,'EastOutside'); 
ax.Position = pos; 
cb.Position(1) = sum(ax.Position([1,3]))+.01;
cb.Position(3) = cb.Position(3).*.5;
end

Demo

ax = gobjects(2,3); 
for i = 1:5
    ax(i) = subplot(3,2,i);
    imagesc(ax(i),rand(100,1000))
    addOutsideColorbar(ax(i))
end
ax(end) = subplot(3,2,6);
plot(ax(end), 1:1000,(1:1000).*rand(1,1000)*2)

Method 3: Use tiledlayout

ax = gobjects(2,3); 
tlo = tiledlayout(3,2);
for i = 1:5
    ax(i) = nexttile(tlo);
    imagesc(ax(i),rand(100,1000))
	colorbar(ax(i))
end
ax(end) = nexttile(tlo);
plot(ax(end), 1:1000,(1:1000).*rand(1,1000)*2)

Best Answer

Related Solutions

MATLAB: How to add one colorbar for the whole figure with tiled layout

MATLAB: Subplot aligment automatic method

Related Question