网上查到的，转载下，已测试可以使用
示例：
x = round(rand(5,3)*10);
h=bar(x,1,'group');
set(gca,'xticklabels',{'benchmark1','benchmark2','benchmark3','benchmark4','benchmark5'});
h = gca;
th=rotateticklabel(h, 45);%调用下面的函数，坐标倾斜45度
function th=rotateticklabel(h,rot,demo)
%ROTATETICKLABEL rotates tick labels
% TH=ROTATETICKLABEL(H,ROT) ris the calling form where H is a handle to
% the axis that contains the XTickLabels that are to be rotated. ROT is
% an optional parameter that specifies the angle of rotation. The default
% angle is 90. TH is a handle to the text objects created. For long
% strings such as those produced by datetick, you may have to adjust the
% position of the axes so the labels don't get cut off.
%
% Of course, GCA can be substituted for H if desired.
%
% TH=ROTATETICKLABEL([],[],'demo') shows a demo figure.
%
% Known deficiencies: if tick labels are raised to a power, the power
% will be lost after rotation.
%
% See also datetick.
% Written Oct 14, by Andy Bliss
% Copyright by Andy Bliss
%DEMO:
if nargin==3
x=[now-.7 now-.3 now];
y=[20 35 15];
figure
plot(x,y,'.-')
datetick('x',0,'keepticks')
h=gca;
set(h,'position',[0.13 0.35 0.775 0.55])
rot=90;
end
%set the default rotation if user doesn't specify
if nargin==1
rot=90;
end
%make sure the rotation is in the range
% 0:360 (brute force method)
% while rot>360
% rot=rot-360;
% end
% while rot<0
% rot=rot+360;
% end
%get current tick labels
a=get(h,'XTickLabel');
%erase current tick labels from figure
set(h,'XTickLabel',[]);
%get tick label positions
b=get(h,'XTick');
c=get(h,'YTick');
%make new tick labels
if rot<180
th=text(b,repmat(c(1)-.1*(c(2)-c(1)),length(b),1),a,'HorizontalAlignment','right','fontsize',14,'fontweight','bold','rotation',rot);
else
th=text(b,repmat(c(1)-.1*(c(2)-c(1)),length(b),1),a,'HorizontalAlignment','left','fontsize',14,'fontweight','bold','rotation',rot);
end
% 如何使用这个函数呢？
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