www.gusucode.com > graphics 案例源码程序 matlab代码 > graphics/CustomizeGraphWithTwoYAxesExample.m
%% Set Properties for Chart with Two y-Axes % The |yyaxis| command creates an axes object with _y_-axes on the left and % right sides. Axes properties related to the _y_-axis have two values. % However, MATLAB gives access only to the value for the active side. For % example, if the left side is active, then the |YDir| property of the axes % object contains the direction for the left _y_-axis. Similarly, if the % right side is active, then the |YDir| property contains the direction for % the right _y_-axis. An exception is that the |YAxis| property of the axes % object contains an array of two numeric ruler objects (one for each % _y_-axis). % % To change the appearance and behavior of a particular _y_-axis, % either set the active side, and then change property values for the axes % object, or use the numeric ruler objects. %% Change Axes Properties % Create a chart with two _y_-axes and plot data. Reverse the direction for % each _y_-axis. Use |yyaxis left| to activate the left side. Next, set % the direction for the left _y_-axis. Similarly, use |yyaxis right| to % activate the right side. Then, set the direction for the right % _y_-axis. x = [1 2 3]; y1 = [2 6 4; 3 5 4; 5 7 8]; y2 = 100*[5 5 3; 3 4 7; 5 6 3]; figure yyaxis left plot(x,y1) yyaxis right plot(x,y2) ax = gca; yyaxis left ax.YDir = 'reverse'; yyaxis right ax.YDir = 'reverse'; %% Change Numeric Ruler Properties % Reverse the directions by setting properties of the % numeric ruler objects. Use |ax.YAxis(1)| to refer to the left side and % |ax.YAxis(2)| to refer to the right side. x = [1 2 3]; y1 = [2 6 4; 3 5 4; 5 7 8]; y2 = 100*[5 5 3; 3 4 7; 5 6 3]; figure yyaxis left plot(x,y1) yyaxis right plot(x,y2) ax = gca; ax.YAxis(1).Direction = 'reverse'; ax.YAxis(2).Direction = 'reverse';