MATLAB: Add Whitespace to Plot

matlab2tikzplot

Dear Community,

I have a sort of uncommon problem: I have made a graph with matlab with a complexity-label (nothing quantitative) at the x-axis . In my graph there are filled regions, which are extended over the whole graph. At the right end of those areas I have added some text. The text juts out over the axis interval of the graph. If I adjust the width of the figure-window manually, everything fits onto the plot. But as I convert my graph with matlab2tikz and add it into my thesis and as the text is outside of the axis interval, the text is cut off and incomplete. I thought about adding some whitespace, but everything I can find is to eliminate the whitespace of figures.

I hope, anyone can help me with my problem, I'd truly appreciate it! Thanks in advance! Georg

Best Answer

If I understand the issue, use the 'position' property and reduce the width value from its default to something less...that should give you more room on the RH side for the text before it runs into the 'outerposition' boundary.

pos=get(gca,'position');  % retrieve the current values
pos(3)=0.9*pos(3);        % try reducing width 10%
set(gca,'position',pos);  % write the new values

With HG2 in recent releases you can use the "dot" property notation.

See the doc for Axes Properties and links therein for all the gory details.

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MATLAB: Moving label for secondary axis

The axis labels are centered on the axis to which they're attached. It appears you used the third (2nd from bottom) subplot to attach the label to.

You can move the label via the editor manually, but programmatically, it's possible by changing the 'position' property of the label. The second value of the three-vector is the vertical location for the center of the label computed to center it on that axes in units of data coordinates. This is quite inconvenient for multiple plots where the data values aren't the same and there are multiple axes. The best idea I've got programmatically would be to

retrieve the axes positions for the bottom and top axes;
compute the vertical extent of these and then
write the label using that position with normalized coordinates

...[former manner elided for brevity...the following is much better]...

The only other solution that eases some of those problems but has other complexities is that one could create another axes of the same extent vertically as the range of the bottom and top subplots but laying to the right of the RH axes. There's an example in the documentation that overlays another axes in the middle of a 2x2 grid that outlines the basic procedure. In this case, with that axes of that overall height, the ylabel would automagically be centered vertically.

There's a File Exchange submission for super titles that addresses the issue for titles not being associated with each axes but overall; whether somebody may have submitted similar for legends or not I don't know; undoubtedly worth a search to see what could find.

ADDENDUM

As noted, had a few minutes and looked at the added-axes option a little more in depth...

for i=1:4,hA(i)=subplot(4,1,i);end
pos1=get(hA(1),'position');  % extents of top axes
pos4=get(hA(4),'position');  % and bottom
pos=[pos4(1:3) pos1(2)+pos1(4)-pos4(2)]; % overall extent of all axes
hAOuter=axes('position',pos,'visible','off');  % invisible one overlaying those
hL=ylabel(hAOuter,'Charcoal index','fontsize',12,'visible','on');

NB: 'visible','on' in the ylabel properties; it'll be 'off' by default as its value is inherited from the parent axes that we made invisible.

MATLAB: Getting hatchfill to properly display a patch legend

It turns out that the problems I described in my original question can all be resolved by using the legendflex and hatchfill2 packages.

Here's an extension of my original code, and the picture that it generates.

clear all;close all
%parameters of the first patch object
obj(1).X = 1 + [0, 0 , 1 , 1 ];
obj(1).Y = 1 + [0, 1 , 1 , 0 ];
obj(1).FaceColor	= 'b';
obj(1).FaceAlpha	= 0.2;
HatchColor{1}		= [0.4,0.4,0.4];
HatchAngle{1}		= 20;
HatchType{1}		= 'single';
HatchDensity{1}		= 20;
%Parameters of the first patch object
obj(2).X = 0.5*[0, 0 , 1 , 1 ];
obj(2).Y = 0.5*[0, 1 , 1 , 0 ];
obj(2).FaceColor	= 'g';
obj(2).FaceAlpha	= 0.2;
HatchColor{2}		= [1,0,0];
HatchAngle{2}		= 20;
HatchDensity{2}		= 10;
HatchType{2}		= 'cross';
%make the patches
for ii=1:2;
	h(ii) 		= patch(obj(ii));
end; 
%hatch the patches
for ii=1:2;
	hHatch(ii) 	= hatchfill2(h(ii),HatchType{ii},...
					'HatchAngle',HatchAngle{ii},...
					'HatchDensity',HatchDensity{ii},...
					'HatchColor',HatchColor{ii});
end;
%Make the legend
Legend  			= {'blue square','green square'};
[legend_h,object_h,plot_h,text_str] = legendflex(h,Legend,...
 						'anchor',{'se','se'},...  
						'buffer',[-90, 60 ],... 
						'fontSize',20);
%object_h is the handle for the lines, patches and text objects
%hatch the legend patches to match the patches 
for ii=1:2;
	hHatch(ii+2) 	= hatchfill2(object_h(ii+2),HatchType{ii}, ...
					'HatchAngle',HatchAngle{ii},...
					'HatchDensity',HatchDensity{ii},...
					'HatchColor',HatchColor{ii});
end;
%I couldn't use hatchfill2 to set the FaceAlpha's so I did it manually
for ii= 1:2
	object_h(ii+2).FaceAlpha = obj(ii).FaceAlpha;  
end;

Best Answer

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MATLAB: Moving label for secondary axis

MATLAB: Getting hatchfill to properly display a patch legend

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