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1、(matlab)plot畫圖的顏色線型?????y?????????黃色???????????·?????????????點線?????m?????????粉紅???????????○?????????????圈線?????c?????????亮藍???????????×?????????????×線?????r?????????大紅???????????+?????????????+字線??????g?????????綠色???????????-?????????????實線?????b?????????藍色???????????*??????????????星形線?????
2、w?????????白色???????????:?????????????虛線?????k?????????黑色?????????-.?????????????????????????????--????????????點劃線matlab6.1線形:[+
3、o
4、*
5、.
6、x
7、square
8、diamond
9、v
10、^
11、>
12、<
13、pentagram
14、hexagram]????square???????????正方形????diamond????????菱形????pentagram?????五角星????hexagram??????六角星用法grid打開網(wǎng)格線--虛線holdon命令用于在已
15、畫好的圖形上添加新的圖形1x=0:0.001:10;%0到10的1000個點(每隔0.001畫一個點)的x座標y=sin(x);%對應的y座標plot(x,y);%繪圖注:matlab畫圖實際上就是描點連線,因此如果點取得不密,畫出來就成了折線圖,請試驗之2Y=sin(10*x);plot(x,y,'r:',x,Y,'b')%同時畫兩個函數(shù)3若要改變顏色,在座標對后面加上相關字串即可:x=0:0.01:10;plot(x,sin(x),'r')4若要同時改變顏色及圖線型態(tài)(Linestyle),也是在坐標對后面加上相關字串即可:plot(x,sin(x),'r*')5用axis
16、([xmin,xmax,ymin,ymax])函數(shù)來調整圖軸的范圍axis([0,6,-1.5,1])6MATLAB也可對圖形加上各種注解與處理:(見上表)xlabel('x軸');%x軸注解ylabel('y軸');%y軸注解title('余弦函數(shù)');%圖形標題legend('y=cos(x)');%圖形注解gtext('y=cos(x)');%圖形注解,用鼠標定位注解位置gridon;%顯示格線7畫橢圓a=[0:pi/50:2*pi]';%角度X=cos(a)*3;%參數(shù)方程Y=sin(a)*2;plot(X,Y);xlabel('x'),ylabel('y');titl
17、e('橢圓')8繪制函數(shù)在0≤x≤1時的曲線。x=0:0.1:1y=x.*exp(-x)%為什么用點運算?若不用會怎樣plot(x,y),xlabel('x'),ylabel('y'),title('y=x*exp(-x)')9畫出衰減振蕩曲線與它的包絡線及。t的取值范圍是[0,4π]。t=0:pi/50:4*pi;y0=exp(-t/3);y=exp(-t/3).*sin(3*t);plot(t,y,'-r',t,y0,':b',t,-y0,':b')%-r表示紅色實線,:b表示藍色點線,看上表grid10在同一個畫面上建立幾個坐標系,用subplot(m,n,p)命令;把一
18、個畫面分成m×n個圖形區(qū)域,p代表當前的區(qū)域號,在每個區(qū)域中分別畫一個圖,如x=linspace(0,2*pi,30);y=sin(x);z=cos(x);u=2*sin(x).*cos(x);v=sin(x)./cos(x);subplot(2,2,1),plot(x,y),axis([02*pi-11]),title('sin(x)')subplot(2,2,2),plot(x,z),axis([02*pi-11]),title('cos(x)')subplot(2,2,3),plot(x,u),axis([02*pi-11]),title('2sin(x)cos(x)')
19、subplot(2,2,4),plot(x,v),axis([02*pi-2020]),title('sin(x)/cos(x)')