MATLAB: Get drawable axis position after axis equal

axisfigureposition;

Say I run this simple test:

figure;
axis;
axis equal;

Then you resize it a little, and run this

disp(gca.Position)

The answer will always be

ans =
    0.1300    0.1100    0.7750    0.8150

which means the Position array will always stay the same, but the drawable (white) area of the axes object will always be resized to fit as much as possible inside that Position array.

The thing is that I want the actual position of the upper-right corner of the drawable area axes object. In this image, I want the position of the green point, not the red point to which I could arrive simply using Position.

Best Answer

See https://www.mathworks.com/matlabcentral/answers/5882-getting-the-axis-position-correctly : The properties TightInset and PlotBoxAspectRatio matter. Before you can interpret them, the axes' units must be set to pixels:

figure
h = axes
axis equal
pause(5);  % Change the figure size
h.Units = 'pixels';
disp(h.TightInset)
disp(h.PlotBoxAspectRatio)
disp(h.Position)
h.Units = normalized;

This should help you to find the solution. Unfortunately I cannot provide a working code yet.

Related Solutions

MATLAB: Plotting using multiple x-axes and y-axes.

...
ax1_pos=set(ax1,'Position');
ax2 = axes('Position',ax1_pos,...

ax1_pos will be empty after the above; you (probably inadvertendtly) typed set instead of get.

Try

    ax1_pos=get(ax1,'Position');

instead.

MATLAB: Heatmap Chart – Depict Squares rather than Rectangles

It drives me nutz that heatmap properties are special cases. To set the aspect ratio of the heatmap, you need to adjust the axis or figure size based on the number or rows & columns. Below are two functional demos. The first adjusts the axis size and recenters it. The second adjusts the figure size instead. I recommend the first method so the heatmap title and other graphics won't potentially expand beyond the figure boundaries.

Method 1: Adjust axis size and re-center

% Create heatmap using built-in Matlab data

load patients
tbl = table(LastName,Age,Gender,SelfAssessedHealthStatus,...
    Smoker,Weight,Location);
h = heatmap(tbl,'Smoker','SelfAssessedHealthStatus');
% Temporarily change axis units 
originalUnits = h.Units;  % save original units (probaly normalized)

h.Units = 'centimeters';  % any unit that will result in squares

% Get number of rows & columns

sz = size(h.ColorData); 
% Change axis size & position;
originalPos = h.Position; 
% make axes square (not the table cells, just the axes)

h.Position(3:4) = min(h.Position(3:4))*[1,1]; 
if sz(1)>sz(2)
    % make the axis size more narrow and re-center
    h.Position(3) = h.Position(3)*(sz(2)/sz(1)); 
    h.Position(1) = (originalPos(1)+originalPos(3)/2)-(h.Position(3)/2);
else
    % make the axis size shorter and re-center
    h.Position(4) = h.Position(4)*(sz(1)/sz(2));
    h.Position(2) = (originalPos(2)+originalPos(4)/2)-(h.Position(4)/2);
end
% Return axis to original units
h.Units = originalUnits;

Method 2: Adjust figure size

% Create heatmap using built-in Matlab data
load patients
tbl = table(LastName,Age,Gender,SelfAssessedHealthStatus,...
    Smoker,Weight,Location);
h = heatmap(tbl,'SelfAssessedHealthStatus','Smoker');
%                ^^^^^^^^^^^^^^^^^^^^^^^^   ^^^^^^    switched from method 1
% Temporarily change figure units 
fh = gcf();  %if you don't already have the figure handle
originalUnits.fig = fh.Units;  % save original units (probaly normalized)
originalUnits.ax = h.Units; 
fh.Units = 'centimeters';  % any unit that will result in squares
h.Units = 'Normalize'; 
% Get number of rows & columns
sz = size(h.ColorData); 
% make axes square (not the table cells, just the axes)
h.Position(3:4) = min(h.Position(3:4))*[1,1]; 
fh.InnerPosition(3:4) = min(fh.InnerPosition(3:4))*[1,1]; 
% Change figure position;
if sz(1)>sz(2)
    % make the figure size more narrow
    fh.InnerPosition(3) = fh.InnerPosition(3)*(sz(2)/sz(1)); 
else
    % make the figure size shorter
    fh.InnerPosition(4) = fh.InnerPosition(4)*(sz(1)/sz(2)); 
end
% return original figure units
fh.Units = originalUnits.fig; 
h.Units = originalUnits.ax;

Best Answer

Related Solutions

MATLAB: Plotting using multiple x-axes and y-axes.

MATLAB: Heatmap Chart – Depict Squares rather than Rectangles

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