MATLAB: Making less space between figures in subplot

figurespacesubplot

Does anyone know how can be make less space between figures in subplot?

Best Answer

The FEX is your friend...

I would start with:

http://www.mathworks.com/matlabcentral/fileexchange/27991-tight-subplot

http://www.mathworks.com/matlabcentral/fileexchange/20003-panel

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MATLAB: Dynamically reorder subplots in GUI

Hm. I've written a small example which shows, that moving the existing axes is not tedious:

function Callback(hObject, EventData)  % *** ERROR - WILL CRASH! ***
handles = guidata(hObject);
% Increment the number of devices (subplots) on click

handles.n_devices = handles.n_devices + 1;
n_rows            = ceil(sqrt(handles.n_devices));
% Old plots must be moved:

if handles.n_rows ~= n_rows
   for iDev = 1:handles.n_devices - 1
      % *ERROR*: subplot deletes existing axes! 
      axesH = subplot(n_rows, n_rows, iDev, 'Parent', handles.uipanel1);
      set(handles.subplots_handles(iDev), 'Position', get(axesH, 'Position'));
      delete(axesH);
   end
end
handles.n_rows = n_rows;
handles.n_cols = n_rows;
% Plot new device:

a_subplot_handle = subplot(handles.n_rows, handles.n_cols, handles.n_devices, ...
   'Parent', handles.uipanel1);
handles.subplots_handles(handles.n_devices) = a_subplot_handle;
plot(1:10, rand(1, 10));
guidata(hObject, handles);
end

Unfortunately it does not run, because subplot deletes the former axes overlapping with the new one. What a pitty. All I want to get is the new position of the axes, but subplot decides smartly that I want to delete objects.

Then I have to rewrite subplot to reply the position only and to avoid any fancy stuff. Wait a little bit...

[EDITED] A working version:

function main  % Just to create a dummy figure
FigH = figure;
handles.n_devices = 0;
handles.n_rows = 0;
handles.n_cols = 0;
handles.subplots_handles = matlab.graphics.axis.Axes([]);
handles.uipanel1 = uipanel('Units', 'pixels');
handles.FullPos  = get(handles.uipanel1, 'Position') + [40, 40, -60, -60];
uicontrol('Style', 'PushButton', 'String', 'Add plot', ...
   'Position', [5, 5, 80, 20], ...
   'Callback', @Callback);
guidata(FigH, handles);
end
function Callback(hObject, EventData)
handles = guidata(hObject);
% Increment the number of devices (subplots) on click
handles.n_devices = handles.n_devices + 1;
n_rows            = ceil(sqrt(handles.n_devices));
% Old plots must be moved:
if handles.n_rows ~= n_rows
   AxesPos = SubPlotPos(handles.FullPos, n_rows, n_rows);
   for iDev = 1:handles.n_devices - 1
      set(handles.subplots_handles(iDev), 'Position', AxesPos(iDev, :));
   end
end
handles.n_rows = n_rows;
handles.n_cols = n_rows;
% Plot new device:
AxesPos = SubPlotPos(handles.FullPos, n_rows, n_rows, handles.n_devices);
a_subplot_handle = axes('Units', 'Pixels', 'Position', AxesPos, ...
   'Parent', handles.uipanel1);
handles.subplots_handles(handles.n_devices) = a_subplot_handle;
plot(1:10, rand(1, 10));
guidata(hObject, handles);
end

This replaces subplot:

function AxesPos = SubPlotPos(FullPos, nCol, nRow, k)
% Position of diagrams - a very light SUBPLOT
% AxesPos = SubPlotPos(Area, nRow, nCol, kAxes)
% A very light version of SUBPLOT without shifting, force requests, an so on.
% Only the positions are replied and the caller has to create its axes itself.
% Input:
%   Area:  Available area [X, Y, W, H] in pixels. This area is filled by
%          the diagrams.
%   nCol,  nRow: Number of columns and rows.
%   kAxes: Reply position of the k'th axes only.
%          Optional. Without this, all nCol*nRow positions are replied.
%
% Author: Jan Simon, Heidelberg, (C) 2017, License: CC BY-SA 3.0
% Formula: Space = a + b * n
% Increase [b] to increase the space between the diagrams.
if nRow < 3
   BplusT = 0.18;
else
   BplusT = 0.09 + 0.045 * nRow;
end
if nCol < 3
   LplusR = 0.18;
else
   LplusR = 0.09 + 0.05 * nCol;
end
spread = 0.7;  
nPlot = nRow * nCol;
plots = 0:(nPlot - 1);
row   = (nRow - 1) - fix(plots(:) / nCol);
col   = rem(plots(:), nCol);
col_offset  = FullPos(3) * LplusR / (nCol - LplusR);
row_offset  = FullPos(4) * BplusT / (nRow - BplusT);
totalwidth  = FullPos(3) + col_offset;
totalheight = FullPos(4) + row_offset;
width       = totalwidth  / nCol - col_offset;
height      = totalheight / nRow - row_offset;
if width * 2 > totalwidth / nCol
   if height * 2 > totalheight / nRow
      AxesPos = [(FullPos(1) + col * totalwidth / nCol), ...
            (FullPos(2) + row * totalheight / nRow), ...
            width(ones(nPlot, 1), 1), ...
            height(ones(nPlot, 1), 1)];
   else
       AxesPos = [(FullPos(1) + col * totalwidth / nCol), ...
            (FullPos(2) + row * FullPos(4) / nRow), ...
            width(ones(nPlot, 1), 1), ...
            (spread * FullPos(ones(nPlot, 1), 4) / nRow)];
   end
else
   if height * 2 <= totalheight / nRow
      AxesPos = [(FullPos(1) + col * FullPos(3) / nCol), ...
            (FullPos(2) + row * FullPos(4) / nRow), ...
            (spread * FullPos(ones(nPlot, 1), 3) / nCol), ...
            (spread * FullPos(ones(nPlot, 1), 4) / nRow)];
   else
      AxesPos = [(FullPos(1) + col * FullPos(3) / nCol), ...
            (FullPos(2) + row * totalheight / nRow), ...
            (spread * FullPos(ones(nPlot, 1), 3) / nCol), ...
            height(ones(nPlot, 1), 1)];
   end
end
if nargin > 3 && ~isempty(k)
   AxesPos = AxesPos(k, :);
end
end

These are not exactly the same positions as with subplot. But you can adjust the parameters to your needs.

See also the mayn submissions in the FEX to improve the subplot command: FEX: Search for "subplot"

MATLAB: Indexing entry of a matrix result

 [nRows, nCols] = size( A ) ;

if you don't need nRows:

 [~, nCols] = size( A ) ;

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MATLAB: Dynamically reorder subplots in GUI

MATLAB: Indexing entry of a matrix result

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