Daniel@0: function ax = axis_pct(pct)
Daniel@0: % AXIS_PCT       Set reasonable axis limits.
Daniel@0: % AXIS_PCT(pct) sets axis limits to extend pct% beyond limits of plotted 
Daniel@0: % objects.  Default is 5%.
Daniel@0: % Works for linear or log scale.
Daniel@0: % Unfortunately, the axes won't change when new points are plotted.
Daniel@0: 
Daniel@0: if nargin < 1
Daniel@0:   pct = 0.05;
Daniel@0: end
Daniel@0: ax = [Inf -Inf Inf -Inf Inf -Inf];
Daniel@0: 
Daniel@0: % find bounding box of plotted objects
Daniel@0: children = get(gca,'children');
Daniel@0: for child = children'
Daniel@0:   if strcmp(get(child,'type'),'text')
Daniel@0:     xyz = get(child,'position');
Daniel@0:     % need to determine bounding box of the text
Daniel@0:     c([1 2]) = xyz(1);
Daniel@0:     c([3 4]) = xyz(2);
Daniel@0:     c([5 6]) = xyz(3);
Daniel@0:   else
Daniel@0:     x = get(child,'xdata');
Daniel@0:     c(1) = min(x);
Daniel@0:     c(2) = max(x);
Daniel@0:     y = get(child,'ydata');
Daniel@0:     c(3) = min(y);
Daniel@0:     c(4) = max(y);
Daniel@0:     z = get(child,'zdata');
Daniel@0:     if isempty(z)
Daniel@0:       c([5 6]) = 0;
Daniel@0:     else
Daniel@0:       c(5) = min(z);
Daniel@0:       c(6) = max(z);
Daniel@0:     end
Daniel@0:   end
Daniel@0:   ax([1 3 5]) = min(ax([1 3 5]), c([1 3 5]));
Daniel@0:   ax([2 4 6]) = max(ax([2 4 6]), c([2 4 6]));
Daniel@0: end
Daniel@0: if strcmp(get(gca,'xscale'), 'log')
Daniel@0:   ax([1 2]) = log(ax([1 2]));
Daniel@0: end
Daniel@0: if strcmp(get(gca,'yscale'), 'log')
Daniel@0:   ax([3 4]) = log(ax([3 4]));
Daniel@0: end
Daniel@0: dx = ax(2)-ax(1);
Daniel@0: if dx == 0
Daniel@0:   dx = 1;
Daniel@0: end
Daniel@0: dy = ax(4)-ax(3);
Daniel@0: if dy == 0
Daniel@0:   dy = 1;
Daniel@0: end
Daniel@0: dz = ax(6)-ax(5);
Daniel@0: if dz == 0
Daniel@0:   dz = 1;
Daniel@0: end
Daniel@0: ax = ax + [-dx dx -dy dy -dz dz]*pct;
Daniel@0: if strcmp(get(gca,'xscale'), 'log')
Daniel@0:   ax([1 2]) = exp(ax([1 2]));
Daniel@0: end
Daniel@0: if strcmp(get(gca,'yscale'), 'log')
Daniel@0:   ax([3 4]) = exp(ax([3 4]));
Daniel@0: end
Daniel@0: % clip for 2D
Daniel@0: ax = ax(1:length(axis));
Daniel@0: axis(ax);
Daniel@0: if nargout < 1
Daniel@0:   clear ax
Daniel@0: end