matlab畫圖顯示部分曲線顯示legend
h1=plot(x1,y1);
h2=plot(x2,y2);
h3=plot(x3,y3);
h4=plot(x4,y4);
legend([h1 h3],'x1-y1','x3-y3');
四線,圖例僅顯示1,3
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
%生成25*25矩陣
-
data = rand(25)+repmat(1:25,25,1);
-
H = plot(data);
-
%只對其中的部分曲線進行標註
-
h1=legend(H([1 6 11 16 21]),'1','6','11','16','21')
-
%使得標註橫向顯示
-
set(h1,'Orientation','horizon')
-
%去除標記框的外圍長方形
-
set(h1,'Box','off');
-
%%%%%%%%%%%%%%%%%%%%%%%%%%
-
方法1:複雜到吐血
例如你有25條曲線,想顯示其中1,6,11,16,21的legend,則
for i = [2:5 7:10 12:15 17:20 22:25]
set(get(get(H(i),'Annotation'),'LegendInformation'),'IconDisplayStyle','off');
end
legend('1','6','11','16','21');方法2:簡單到鬱悶
H = plot(data);
legend(H([1 6 11 16 21],'1,'6','11’,'16','21');
如果一個圖中我們畫了n條曲線,但是我們只想加圖例說明(legend)的只有m條 (m
1. 最簡單,最超級無敵的方法:把想要標註的圖形命令給個變數名,然後再legend命令中指定。x = -3.14:0.1:3.14;
y1 = sin(x);
y2 = cos(x);
y3 = .1*exp(x);
y4 = y1.*y3;
hold on
h1 = plot(x, y1, 'r');
h2 = plot(x, y2, 'g');
h3 = plot(x, y3, 'k');
h4 = plot(x, y4, 'm');
hold off
xlim auto
legend([h1,h3],'sin', 'exp');2.通過控制Annotation屬性來實現,詳細控制方法參見http://www.mathworks.cn/help/techdoc/creating_plots/braliom.html;jsessionid=HPs0TNGQxP2TXMcZgQv4zkMvmSsZYbhG6Lwjd3JT271PLqXnHxhY!-1484299157。但是需要注意的是在稍微低版本的MATLAB中,並不提供Annotation的控制(至少我的R14SP1不支援)。
x = -3.14:0.1:3.14;
y1 = sin(x);
y2 = cos(x);
y3 = .1*exp(x);
y4 = y1.*y3;
hold on
h1 = plot(x, y1, 'r');
h2 = plot(x, y2, 'g');
h3 = plot(x, y3, 'k');
h4 = plot(x, y4, 'm');
hold off
xlim auto
set(get(get(h2, 'Annotation'), 'LegendInformation'), 'IconDisplayStyle', 'off');
set(get(get(h4, 'Annotation'), 'LegendInformation'), 'IconDisplayStyle', 'off');
legend('sin', 'exp');3.多個legend以及標註部分圖列構成多列圖列
t=0:pi/100:2*pi;
y1=sin(t);
y2=cos(t);
y3=y1.*y2;
y4=0.5*(y1+y2);
hold on
h1=plot(t,y1,'-r')
%h11 = plot(t(1:10:end),y1(1:10:end),'o','MarkerFaceColor','r','MarkerEdgeColor','r');
h11 = plot(t(1:20:end),y1(1:20:end),'ro');
h2=plot(t,y2,'b-');
%h22 = plot(t(1:10:end),y2(1:10:end),'^','MarkerFaceColor','b','MarkerEdgeColor','b');
h22 = plot(t(1:20:end),y2(1:20:end),'b^')
h3=plot(t,y3,'c');
h4=plot(t,y4,'g');
hold off
[legh,objh,outh,outm]=legend([h1,h2],'y1','y2',1);
legend boxoff% matlab 6.5.1
%set(objh(3),'marker','*');
%set(objh(5),'marker','.');% matlab7
set(objh(4),'marker','o');
set(objh(6),'marker','^');
legh2=copyobj(legh,gcf);
[legh2,objh2]=legend([h3,h4],'y3','y4',2);
legend boxoff這樣畫好後,只有第二個legend可拖動,而第一個legend不可拖動,原因不明。
4.Matlab提供的legend函式,給出的legend經常覆蓋了某些曲線,這樣就需要把legend分成幾個,相對獨立,這樣可以使用滑鼠隨意移動,確保不遮擋曲線。
a=linspace(0,2*pi,100);
y1=100*sin(a);
y2=50*cos(a);
y3=tan(a);
y4=log(a);
y=[y1;y2;y3;y4];
figure
p=plot(a,y)
legend(p(1:2),'sin','cos');
ah=axes('position',get(gca,'position'),...
'visible','off');
legend(ah,p(3:4),'tan','log','location','west');5.用plot函式對兩個長度為30的向量分別繪製曲線的時候,在兩條曲線上各畫了一個marker(因為如果把所有的marker都放上去的話,感覺很擁擠,不是很好看),在對最終的畫圖效果做legend標註的時候,我希望將曲線及其上的marker一起標註
clc;
clear;
close all;figure_handle = figure;
set(figure_handle, 'Color', 'w');
data=zeros(1, 100);
data(1) = 1;
data(2) = 1;
data(3) = 1;
t = [1 : 30] / 100 * 2 * pi;
cur1=real(fft(data) / 3);
cur1p = cur1(1 : 30);
h_1(1) = plot(t, cur1p, 'LineStyle', '-', 'LineWidth', 2, 'Color', 'r');
hold on
h_1(2) = plot(t(15), cur1p(15), 'LineStyle', '-', 'LineWidth', 2, 'Color', 'r', 'Marker', 's', 'MarkerSize', 10, 'MarkerEdgeColor', 'r', 'MarkerFaceColor', 'r');
set(h_1, 'Parent', hSGroup);
set(get(get(hSGroup, 'Annotation'), 'LegendInformation'), 'IconDisplayStyle', 'on');
cur2 = real(fft(data)) .* real(fft(data))/9;
cur2p = cur2(1 : 30);
h_2(1) = plot(t, cur2p, 'LineStyle', '-', 'LineWidth', 2, 'Color', 'g');
h_2(2) = plot(t(12), cur2p(12), 'LineStyle', '-', 'LineWidth', 2, 'Color', 'g', 'Marker', 'o', 'MarkerSize',10, 'MarkerEdgeColor', 'g', 'MarkerFaceColor', 'g');
set(h_2, 'Parent', hCGroup);
set(get(get(hCGroup, 'Annotation'), 'LegendInformation'), 'IconDisplayStyle', 'on');
legend('1 level', '2 levels');