matlab繪制雙縱坐標(biāo)圖

1、MATLAB畫雙縱坐標(biāo)具有兩個縱坐標(biāo)標(biāo)度的圖形在MATLAB中，如果需要繪制出具有不同縱坐標(biāo)標(biāo)度的兩個圖形，可以使用plotyy繪圖函數(shù)。調(diào)用格式為：plotyy(x1,y1,x2,y2)其中x1,y1對應(yīng)一條曲線，x2,y2對應(yīng)另一條曲線。橫坐標(biāo)的標(biāo)度相同，縱坐標(biāo)有兩個，左縱坐標(biāo)用于x1,y1數(shù)據(jù)對，右縱坐標(biāo)用于x2,y2數(shù)據(jù)對。雙y軸坐標(biāo)可以用plotyy(x,y1,x,y2)來實現(xiàn)雙x坐標(biāo)可以用set(gca,'xaxislocation','bottom','xticklabel','0','1','

2、;2',3,'4')(假設(shè)x軸的標(biāo)注為1，2，3，4)set(gca,'xaxislocation','top','xticklabel','0','1','2',3,'4')進(jìn)行相應(yīng)的設(shè)置實現(xiàn)雙縱坐標(biāo)畫圖，其中一個為對數(shù)坐標(biāo)，另一個為正常坐標(biāo)。而且兩個坐標(biāo)的范圍差別很大舉例如下：t=0:900;A=1000;a=0.005;b=0.005;z1=A*exp(-a*t);z2=sin(b*t);haxes,hline1,hline2=plotyy(t,z1,t

3、,z2,'semilogy','plot');matlab作圖里面如何分別設(shè)置雙縱坐標(biāo)的刻度？工作遇到如下問題：需要設(shè)置雙y軸的刻度，用到以下函數(shù)，set(gca,'XTick',0:5:100)set(gca,'yTick',0:10:350)只是設(shè)置左邊的y軸刻度，請問各位高手，右邊y軸怎么設(shè)置刻度標(biāo)注？雙縱坐標(biāo)的標(biāo)注已實現(xiàn)AX=plotyy(x1,y1,x1,y2);set(get(AX(1),'Ylabel'),'string','leftY-axis);set(get(AX(2),

4、'Ylabel'),'string','righty-axis');了解plotyy的返回值A(chǔ)X=plotyy(x1,y1,x1,y2);得到兩個axes句柄，AX和AX(2)set(AX(1),'yTick',0:10:350)設(shè)置左邊Y軸的刻度set(AX(2),'yTick',0:10:350)設(shè)置右邊Y軸的刻度雙y坐標(biāo)實例closeallhiddenclearallclc%w=boxcar(nfft);fni1=input('請輸入時間序列文件:','s');fid仁fope

5、n(fni1,'r');s=fscanf(fid1,'%s',1);ifsame(s,'Curve')fori=1:61tline=fgetl(fid1);endelsefid仁fopen(fni1,'r');enda仁fscanf(fid1,'%f);status=fclose(fid1);n=length(a1);n2=n/2;a2=reshape(a1,2,n2);x1=a2(1,:);y1=a2(2,:);fni2=input('輸入速度曲線文件','s');fid2=fopen(f

6、ni2,'r');b=fscanf(fid2,'%f);n3=length(b);n4=n3/2;b2=reshape(b,2,n4);x2=b2(1,:);y2=b2(2,:);p=polyfit(x2,y2,3);y3=polyval(p,x2);%plot(x2,y2)AX,H1,H2=plotyy(x1,y1,x2,y3);gridon;xlabel('時間/s');set(get(AX(1),'Ylabel'),'string','加速度/g');set(get(AX(2),'Ylabel

7、'),'string','速度km/h');set(AX(1),'yTick',-2:0.5:2);%axesl=axes('Position',0.080.730.380.25,'Parent',figure1);%axis(axes1,0xtime(end)-0.50.5);%set(AX(2),'YTick',300:5:350);yticks2=linspace(300,360,9);set(AX(2)，'丫Lim',300360,'YTick',yt

8、icks2);set(H2,'linewidth',3);x=0:0.01:20;y1=200*exp(-0.05*x).*sin(x);y2=0.8*exp(-0.5*x).*sin(10*x);AX,H1,H2=plotyy(x,y1,x,y2,'plot');set(AX(1),'XColor','k','YColor','b');set(AX(2),'XColor','k','YColor','r');HH1=get(AX(1)

9、,'Ylabel');set(HH1,'String','LeftY-axis');set(HH1,'color','b');HH2=get(AX(2),'Ylabel');set(HH2,'String','RightY-axis');set(HH2,'color','r');set(H1,'LineStyle','-');set(H1,'color','b');set(

10、H2,'LineStyle',':');set(H2,'color','r');legend(H1,H2,'y10.8*exp(-0.5*x).*sin(10*x)');xlabel('Zeroto20musec.');title('Labelingplotyy');200*exp(-0.05*x).*sin(x)''y2-.11Labelingmy;1£C100050i6日1J12-4-GZenotol.UH3ecIB2DJo-O.6曲證>曇a.2o

11、-rr111-MATLAB作圖：plotyy使用方法。即：橫坐標(biāo)相同，縱坐標(biāo)不同的兩條曲線畫在同一圖上進(jìn)行比對。例1.需要采用圖形句柄，詳細(xì)內(nèi)容參考MATLAB幫助文件有關(guān)plotyy的例程%Thisexamplegraphstwomathematicalfunctionsusingplotastheplottingfunction.Thetwoy-axes%enableyoutodisplaybothsetsofdataononegrapheventhoughrelativevaluesofthedataarequite%different.x=0:0.01:20;y1=200*exp(-0

12、.05*x).*sin(x);y2=0.8*exp(-0.5*x).*sin(10*x);AX,H1,H2=plotyy(x,y1,x,y2,'plot');用AX,H1,H2=plotyy(x,y1,x,y2);命令。AX(1),AX(2)分別為左右丫軸的句柄%Youcanusethehandlesreturnedbyplotyytolabeltheaxesandsetthelinestylesusedforplotting.%WiththeaxeshandlesyoucanspecifytheYLabelpropertiesoftheleft-andright-sidey-

13、axis:set(get(AX(1),'Ylabel'),'String','SlowDecay')set(get(AX(2),'Ylabel'),'String','FastDecay')%Usethexlabelandtitlecommandstolabelthex-axisandaddatitle:xlabel('Time(musec)')title('MultipleDecayRates')%UsethelinehandlestosettheLineStyle

14、propertiesoftheleft-andright-sideplots:set(H1,'LineStyle','-')set(H2,'LineStyle',':')例2.線型設(shè)置:t=0:.1:8;ax,h1,h2=plotyy(t,sin(t),t,cos(t);set(h1,'linestyle','-','marker','o','color','r');set(h2,'linestyle',':&#

15、39;,'marker','x','color','b');加注圖例:x=linspace(0,2*pi,40);ax,h1,h2=plotyy(x,sin(x)+cos(x),x,exp(x);set(h1,'linestyle','-')set(h2,'linestyle','-')set(h1,'marker','o')set(h2,'marker','+')holdonx=linspace(0,2

16、*pi,40);hh=line(x,cos(x);set(hh,'linestyle','-')set(hh,'marker','s')holdonhhf=line(x,sin(x);set(hhf,'color','r')set(hhf,'linestyle','-')set(hhf,'marker','*')legend(h1,h2,hh,hhf,'sin(x)+cos(x)','exp(x)',&#

17、39;cos(x)','sin(x)',0);坐標(biāo)軸標(biāo)注:figure;t=0:.1:3*pi;H,Ha,Hb=plotyy(t,sin(t),t,exp(t);d1=get(H(1),'ylabel');set(d1,'string','yayacpf);d2=get(H(2),'ylabel');set(d2,'string','bbsfromhit','fontsize',18);matlab中如何顯示plotyy的legend舉例：ax,h1,h2=plotyy(x1,y1,x2,y2);holdon;h3=plot(