Matlab实验1 答案.doc

Matlab 曲线绘图练习1. 绘出立方曲线。x=-2:0.05:2;y=x.3;plot(x,y)grid on 2. 立方抛物线。y=-2:0.05:2;x=y.3;plot(x,y)grid on 3. 高斯曲线。clear;x=-2:0.05:2;y=exp(-x.2);plot(x,y) 以参数方程表示的曲线：4. 奈尔抛物线clear;t=-2:0.05:2;x=t.3;y=t.2plot(x,y) y = Columns 1 through 14 4.0000 3.8025 3.6100 3.4225 3.2400 3.0625 2.8900 2.7225 2.5600 2.4025 2.2500 2.1025 1.9600 1.8225 Columns 15 through 28 1.6900 1.5625 1.4400 1.3225 1.2100 1.1025 1.0000 0.9025 0.8100 0.7225 0.6400 0.5625 0.4900 0.4225 Columns 29 through 42 0.3600 0.3025 0.2500 0.2025 0.1600 0.1225 0.0900 0.0625 0.0400 0.0225 0.0100 0.0025 0 0.0025 Columns 43 through 56 0.0100 0.0225 0.0400 0.0625 0.0900 0.1225 0.1600 0.2025 0.2500 0.3025 0.3600 0.4225 0.4900 0.5625 Columns 57 through 70 0.6400 0.7225 0.8100 0.9025 1.0000 1.1025 1.2100 1.3225 1.4400 1.5625 1.6900 1.8225 1.9600 2.1025 Columns 71 through 81 2.2500 2.4025 2.5600 2.7225 2.8900 3.0625 3.2400 3.4225 3.6100 3.8025 4.0000 5. 半立方抛物线clear;t=-2:0.05:2;x=t.2;y=t.3plot(x,y) y = Columns 1 through 14 -8.0000 -7.4149 -6.8590 -6.3316 -5.8320 -5.3594 -4.9130 -4.4921 -4.0960 -3.7239 -3.3750 -3.0486 -2.7440 -2.4604 Columns 15 through 28 -2.1970 -1.9531 -1.7280 -1.5209 -1.3310 -1.1576 -1.0000 -0.8574 -0.7290 -0.6141 -0.5120 -0.4219 -0.3430 -0.2746 Columns 29 through 42 -0.2160 -0.1664 -0.1250 -0.0911 -0.0640 -0.0429 -0.0270 -0.0156 -0.0080 -0.0034 -0.0010 -0.0001 0 0.0001 Columns 43 through 56 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 Columns 57 through 70 0.5120 0.6141 0.7290 0.8574 1.0000 1.1576 1.3310 1.5209 1.7280 1.9531 2.1970 2.4604 2.7440 3.0486 Columns 71 through 81 3.3750 3.7239 4.0960 4.4921 4.9130 5.3594 5.8320 6.3316 6.8590 7.4149 8.0000 6. 迪卡尔曲线clear;a=3;t=-2:0.05:2;x=3*a.*t./(1+t.2);y=3*a.*t.2./(1+t.2);plot(x,y);grid on 7. 蔓叶线clear;a=2;t=-10:0.05:10;x=a.*t.2./(1+t.2);y=a.*t.3./(1+t.2);plot(x,y);grid on 8. 摆线。clear;a=1;b=2;t=linspace(0,6*pi,100);x=a*(t-sin(t);y=b*(1-cos(t);plot(x,y);grid on 9. 内摆线（星形线）。clear;a=1;t=linspace(0,2*pi,100);x=a*cos(t).3;y=a*sin(t).3;plot(x,y)grid on 10. 圆的渐伸线（渐开线）。clear;a=1;t=linspace(0,6*pi,101);x=a*(cos(t)+t.*sin(t);y=a*(sin(t)-t.*cos(t);plot(x,y) 11. 空间螺线。clear;a=1;b=2;c=3;t=-2:0.05:2;x=a*cos(t);y=b*sin(t);z=c*tplot3(x,y,z) z = Columns 1 through 14 -6.0000 -5.8500 -5.7000 -5.5500 -5.4000 -5.2500 -5.1000 -4.9500 -4.8000 -4.6500 -4.5000 -4.3500 -4.2000 -4.0500 Columns 15 through 28 -3.9000 -3.7500 -3.6000 -3.4500 -3.3000 -3.1500 -3.0000 -2.8500 -2.7000 -2.5500 -2.4000 -2.2500 -2.1000 -1.9500 Columns 29 through 42 -1.8000 -1.6500 -1.5000 -1.3500 -1.2000 -1.0500 -0.9000 -0.7500 -0.6000 -0.4500 -0.3000 -0.1500 0 0.1500 Columns 43 through 56 0.3000 0.4500 0.6000 0.7500 0.9000 1.0500 1.2000 1.3500 1.5000 1.6500 1.8000 1.9500 2.1000 2.2500 Columns 57 through 70 2.4000 2.5500 2.7000 2.8500 3.0000 3.1500 3.3000 3.4500 3.6000 3.7500 3.9000 4.0500 4.2000 4.3500 Columns 71 through 81 4.5000 4.6500 4.8000 4.9500 5.1000 5.2500 5.4000 5.5500 5.7000 5.8500 6.0000 以极坐标方程表示的曲线12. 阿基米德线clear;close;a=2;t=-2:0.05:2;r=a*tx=r.*cos(t);y=r.*sin(t);plot(x,y) r = Columns 1 through 14 -4.0000 -3.9000 -3.8000 -3.7000 -3.6000 -3.5000 -3.4000 -3.3000 -3.2000 -3.1000 -3.0000 -2.9000 -2.8000 -2.7000 Columns 15 through 28 -2.6000 -2.5000 -2.4000 -2.3000 -2.2000 -2.1000 -2.0000 -1.9000 -1.8000 -1.7000 -1.6000 -1.5000 -1.4000 -1.3000 Columns 29 through 42 -1.2000 -1.1000 -1.0000 -0.9000 -0.8000 -0.7000 -0.6000 -0.5000 -0.4000 -0.3000 -0.2000 -0.1000 0 0.1000 Columns 43 through 56 0.2000 0.3000 0.4000 0.5000 0.6000 0.7000 0.8000 0.9000 1.0000 1.1000 1.2000 1.3000 1.4000 1.5000 Columns 57 through 70 1.6000 1.7000 1.8000 1.9000 2.0000 2.1000 2.2000 2.3000 2.4000 2.5000 2.6000 2.7000 2.8000 2.9000 Columns 71 through 81 3.0000 3.1000 3.2000 3.3000 3.4000 3.5000 3.6000 3.7000 3.8000 3.9000 4.0000 13. 对数螺线clear;close;a=2;t=linspace(0,6*pi,10000);r=exp(a*t);x=r.*cos(t);y=r.*sin(t);plot(x,y) 14.双纽线clear;close;a=2;t=linspace(0,6*pi,10000);r=sqrt(a2.*cos(2*t);x=r.*cos(t);y=r.*sin(t);plot(x,y) Warning: Imaginary parts of complex X and/or Y arguments ignored 15. .双纽线 clear;close;a=1;t=linspace(0,6*pi,10000);r=sqrt(a2.*sin(2*t);x=r.*cos(t);y=r.*sin(t);plot(x,y) Warning: Imaginary parts of complex X and/or Y arguments ignored 16. 四叶玫瑰线 clear;close;a=2;t=linspace(0,6*pi,10000);r=a*sin(2*t);x=r