plotyyy.m

来自「matlab源代码,适用于开发研究,带来很好的学习效果.」· M 代码 · 共 54 行

function [ax,hlines] = plotyyy(x1,y1,x2,y2,x3,y3,ylabels)
%PLOTYYY - Extends plotyy to include a third y-axis
%
%Syntax:  [ax,hlines] = plotyyy(x1,y1,x2,y2,x3,y3,ylabels)
%
%Inputs: x1,y1 are the xdata and ydata for the first axes' line
%        x2,y2 are the xdata and ydata for the second axes' line
%        x3,y3 are the xdata and ydata for the third axes' line
%        ylabels is a 3x1 cell array containing the ylabel strings
%
%Outputs: ax -     3x1 double array containing the axes' handles
%         hlines - 3x1 double array containing the lines' handles

%Author: Denis Gilbert, Ph.D., physical oceanography
%Maurice Lamontagne Institute
%Dept. of Fisheries and Oceans Canada
%email: [e-mail]  
%Web: http://www.qc.dfo-mpo.gc.ca/iml/
%April 2000; Last revision: 14-Nov-2001

if nargin==6
   ylabels{1}=' '; ylabels{2}=' '; ylabels{3}=' ';
end

figure('units','normalized',...
       'DefaultAxesXMinorTick','on','DefaultAxesYminorTick','on'); 

[ax,hlines(1),hlines(2)] = plotyy(x1,y1,x2,y2);
cfig = get(gcf,'color');
pos = [0.1  0.1  0.7  0.8];
offset = pos(3)/5.5;

pos(3) = pos(3) - offset/2;
set(ax,'position',pos);  

pos3=[pos(1) pos(2) pos(3)+offset pos(4)];

limx1=get(ax(1),'xlim');
limx3=[limx1(1)   limx1(1) + 1.2*(limx1(2)-limx1(1))];

ax(3)=axes('Position',pos3,'box','off',...
   'Color','none','XColor','k','YColor','r',...   
   'xtick',[],'xlim',limx3,'yaxislocation','right');

hlines(3) = line(x3,y3,'Color','r','Parent',ax(3));
limy3=get(ax(3),'YLim');

line([limx1(2) limx3(2)],[limy3(1) limy3(1)],...
   'Color',cfig,'Parent',ax(3),'Clipping','off');
axes(ax(2))

set(get(ax(1),'ylabel'),'string',ylabels{1})
set(get(ax(2),'ylabel'),'string',ylabels{2})
set(get(ax(3),'ylabel'),'string',ylabels{3})