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Removing deadspace in subplots while retaining title & labels

由 丶灬走出姿态 提交于 2019-11-30 15:05:45

The built in subplot function is really powerful and nice. Instead of going with custom computed positions, I think it is best to stick with subplot. The problem of course is that subplot sticks in "extra" space. This space is controlled by two factors. The first is the user controlled SubplotDefaultAxesLocation property of the application data of figures. The second is a hardcoded inset within the subplot function. The SubplotDefaultAxesLocation property controls the whitespace around the edge of the figure while the inset controls the space between the panels. You can remove the space around the figure with

hfig = figure;
setappdata(hfig, 'SubplotDefaultAxesLocation', [0, 0, 1, 1])

To remove the space between panels you need to edit (or copy edit) subplot.m In R2013a the offending lines are 129 and 130

% This is the percent offset from the subplot grid of the plotbox.
inset = [.2, .18, .04, .1]; % [left bottom right top]

If you change line 130 to be

inset = [0.0, 0.0, 0.0, 0.0]; % [left bottom right top]

then the panels will not have any space between them. Even better would be something like

% This is the percent offset from the subplot grid of the plotbox.
if ~isappdata(ancestorFigure, 'SubplotDefaultInset')
    inset = [.2, .18, .04, .1]; % [left bottom right top]
else
    inset = getappdata(ancestorFigure, 'SubplotDefaultInset');
end

so you can control the inset. With this slightly modified subplot function

I = imread('coins.png');
I = imresize(I,[128 128]);

voffset = 0.3;
hfig = figure;
setappdata(hfig, 'SubplotDefaultAxesLocation', [0, voffset/2, 1, 1-voffset]);
setappdata(hfig, 'SubplotDefaultInset', [0, 0, 0, 0]);

nrow = 2;
ncol = 5;
hax = nan(nrow, ncol);
for irow = 1:nrow
    for icol = 1:ncol
        hax(irow, icol) = mysubplot(nrow, ncol, icol+(irow-1)*ncol, 'align');
        imshow(I);
        if irow == 1
            title(hax(irow, icol), ['Curve #', num2str(icol)], 'FontSize',12);
        end
        if irow == nrow
            xlabel(hax(irow, icol), ['(', char(96+icol), ')'], 'FontSize',12);
        end
    end
end
set(hax,  'XTick', [], 'YTick', []);

pos = get(hfig, 'Position');
set(hfig, 'Position', [pos(1:2), (1-voffset)*pos(3), nrow/ncol*pos(3)]);

You need the voffset to allow the title and xlabel to fit on the figure. You need to scale the figure so that it has the correct aspect ratio to handle the panels. The result is

The small gap between curve 1 and 2 and curve 3 and 4 appears to be a rendering artefact.

If you want the labels between the rows, you need to add some extra space. For example to add just labels on the x axis you can do

voffset = 0.35;
setappdata(hfig, 'SubplotDefaultAxesLocation', [0, voffset/4, 1, 1-voffset/2]);
setappdata(hfig, 'SubplotDefaultInset', [0, voffset/2, 0, 0]);

The subaxis funcion you can find here at the Matlab File Exchange: subaxis by Aslak Grinsted offers you a very convenient solution.

when subplots overlap, the earlier one is hidden.

try slightly decreasing the 'Position' width.

they should show up again

also, there could be some "snap to grid" issues, how does this behave when you resize the window?

close all
figure,set(gca,'Color','none')
subplot('Position',[0.025 0.51  0.19 0.48]);get(gca,'position');set(gca, 'XTick', []);set(gca, 'YTick', []);
imshow(I);hold on; axis off;
contour((BW(:,:,1)), [0 0], 'r','LineWidth',2);
hold off;title('1st curve','FontSize',12);h=xlabel('(a)','FontSize',12);
s=get(h,'Position');
s(2)=s(2)-28;
set(h,'Position',s);
subplot('Position',[0.025+0.19*1 0.51  0.19 0.48]);get(gca,'position');set(gca, 'XTick', []);set(gca, 'YTick', []);
imshow(I);hold on; axis off;
contour((BW(:,:,2)), [0 0], 'r','LineWidth',2);
hold off;title('2nd curve','FontSize',12);h=xlabel('(b)','FontSize',12);
s=get(h,'Position');
s(2)=s(2)-28;
set(h,'Position',s);
subplot('Position',[0.025+0.19*2 0.51  0.19 0.48]);get(gca,'position');set(gca, 'XTick', []);set(gca, 'YTick', []);
imshow(I);hold on; axis off;
contour((BW(:,:,3)), [0 0], 'r','LineWidth',2);
hold off;title('3rd curve','FontSize',12);h=xlabel('(c)','FontSize',12);
s=get(h,'Position');
s(2)=s(2)-28;
set(h,'Position',s);
subplot('Position',[0.025+0.19*3 0.51  0.19 0.48]);get(gca,'position');set(gca, 'XTick', []);set(gca, 'YTick', []);
imshow(I);hold on; axis off;
contour((BW(:,:,4)), [0 0], 'r','LineWidth',2);
hold off;title('4th curve','FontSize',12);h=xlabel('(d)','FontSize',12);
s=get(h,'Position');
s(2)=s(2)-28;
set(h,'Position',s);
subplot('Position',[0.025+0.19*4 0.51  0.19 0.48]);get(gca,'position');set(gca, 'XTick', []);set(gca, 'YTick', []);
imshow(I);hold on; axis off;
contour((BW(:,:,5)), [0 0], 'r','LineWidth',2);
hold off;title('5th curve','FontSize',12);h=xlabel('(e)','FontSize',12);
s=get(h,'Position');
s(2)=s(2)-28;
set(h,'Position',s);

subplot('Position',[0.025 0.03  0.19 0.48]);get(gca,'position');set(gca, 'XTick', []);set(gca, 'YTick', []);
seg = phi0(:,:,1)<=0;imshow(seg);
h=xlabel('(f)','FontSize',12);
s=get(h,'Position');
s(2)=s(2)-28;
set(h,'Position',s);
subplot('Position',[0.025+0.19*1 0.03  0.19 0.48]);get(gca,'position');set(gca, 'XTick', []);set(gca, 'YTick', []);
seg = phi0(:,:,2)<=0;imshow(seg);
h=xlabel('(g)','FontSize',12);
s=get(h,'Position');
s(2)=s(2)-28;
set(h,'Position',s);
subplot('Position',[0.025+0.19*2 0.03  0.19 0.48]);get(gca,'position');set(gca, 'XTick', []);set(gca, 'YTick', []);
seg = phi0(:,:,3)<=0;imshow(seg);
h=xlabel('(h)','FontSize',12);
s=get(h,'Position');
s(2)=s(2)-28;
set(h,'Position',s);
subplot('Position',[0.025+0.19*3 0.03  0.19 0.48]);get(gca,'position');set(gca, 'XTick', []);set(gca, 'YTick', []);
seg = phi0(:,:,4)<=0;imshow(seg);
h=xlabel('(i)','FontSize',12);
s=get(h,'Position');
s(2)=s(2)-28;
set(h,'Position',s);
subplot('Position',[0.025+0.19*4 0.03  0.19 0.48]);get(gca,'position');set(gca, 'XTick', []);set(gca, 'YTick', []);
seg = phi0(:,:,5)<=0;imshow(seg);
h=xlabel('(j)','FontSize',12);
s=get(h,'Position');
s(2)=s(2)-28;
set(h,'Position',s);

Thanks everybody I got the correct answer. I changed my code a bit.

This was the answer I got :

vish

Of course it can be done with a single loop (using a cell array for your variables, and one for the plotting functions ) but for simplicity i would just lump it as two loops .

labels = {'(a)' , '(n)' , '(etc)' , 'asdf','asddf'}
jay=1
for aye =1:5
     subplot('Position',[0.025+0.19*(aye-1) 0.51-0.48*(jay-1)  0.19 0.48]);
    ...
     h=xlabel(labelsabc{aye},'FontSize',12);
     ....
end
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