摘要：
添加legend：h=legend('C1','C2','C3','C4','C5','C6','Orientation','horizontal');legendmarkeradjust(12,'horizontal')调用legendmarkeradjust(varargin)函数，第一个参数为Markersize尺寸，第二个参数为legend的方向legendmarkeradjust函数定义
添加legend：
h = legend('C1', 'C2', 'C3', 'C4', 'C5', 'C6', 'Orientation', 'horizontal');
legendmarkeradjust(12, 'horizontal')
调用legendmarkeradjust(varargin)函数，第一个参数为Markersize尺寸，第二个参数为legend的方向
legendmarkeradjust函数定义如下：
function legendmarkeradjust(varargin)
a1=ver('matlab');
rls=a1.Release;
rlsnumber=str2num(rls(5:6));
if rlsnumber>=14 && ~strcmp(a1.Release,'(R2014a')
leg=get(legend);
legfontsize=leg.FontSize;
legstrings=leg.String;
legloc=leg.Location;
delete(legend)
[l1,l2,l3,l4]=legend(legstrings, 'Orientation', varargin{2});
for n=1:length(l2)
if sum(strcmp(properties(l2(n)),'MarkerSize'))
l2(n).MarkerSize=varargin{1};
elseif sum(strcmp(properties(l2(n).Children),'MarkerSize'))
l2(n).Children.MarkerSize=varargin{1};
end
end
for n=1:length(l2)
if sum(strcmp(properties(l2(n)),'FontSize'))
l2(n).FontSize=legfontsize;
elseif sum(strcmp(properties(l2(n).Children),'FontSize'))
l2(n).Children.FontSize=varargin{1};
end
end
set(l1,'location',legloc)
else
s=get(legend);
s1=s.Children;
s2=[];
s2=findobj(s1,{'type','patch','-or','type','line'});
switch length(varargin)
case 1
marksize=varargin{1};
for m=1:length(s2)
set(s2(m),'markersize',marksize);
end
case 2
marksize=varargin{1};
lwidth=varargin{2};
for m=1:length(s2)
set(s2(m),'markersize',marksize,'linewidth',lwidth);
end
end
end
参考：
https://www.ilovematlab.cn/thread-583495-1-1.html