實(shí)驗(yàn)六MATLAB大數(shù)據(jù)可視化

1、實(shí)用標(biāo)準(zhǔn)文案實(shí)驗(yàn)六MATLAB數(shù)據(jù)可視化一、實(shí)驗(yàn)?zāi)康恼莆?MATLAB二維、三維圖形繪制，掌握圖形屬性的設(shè)置和圖形修飾；掌握圖像文件的讀取和顯示。二、實(shí)驗(yàn)內(nèi)容(1) 二維圖形繪制。(2) 三維曲線和三維曲面繪制。(3) 圖像文件的讀取和顯示。三、實(shí)驗(yàn)步驟1. 二維圖形繪制(1) 二維圖形繪制主要使用函數(shù)plot. clear all x=linspace(0,2*pi,100); y1=sin(x); plot(x,y1) hold on y2=cos(x) plot(x,y2)(2) 函數(shù) plot 的參數(shù)也可以是矩陣。 clear all x=linspace(0,2*pi,100); y

2、1=sin(x);精彩文檔實(shí)用標(biāo)準(zhǔn)文案 y2=cos(x); A=y1 ; y2; B=x ; x plot(B,A)B =000.06350.44430.88850.06350.50770.88850.12690.50770.95200.12690.57120.95200.19040.57121.01550.19040.63471.01550.25390.63471.07890.25390.69811.07890.31730.69811.14240.31730.76161.14240.38080.76161.20590.38080.82511.20590.44430.82511.2693精彩

3、文檔實(shí)用標(biāo)準(zhǔn)文案1.26931.96752.66561.33282.03092.72911.33282.03092.72911.39632.09442.79251.39632.09442.79251.45972.15792.85601.45972.15792.85601.52322.22132.91951.52322.22132.91951.58672.28482.98291.58672.28482.98291.65012.34833.04641.65012.34833.04641.71362.41173.10991.71362.41173.10991.77712.47523.17331.77

4、712.47523.17331.84052.53873.23681.84052.53873.23681.90402.60213.30031.90402.60213.30031.96752.66563.3637精彩文檔實(shí)用標(biāo)準(zhǔn)文案3.36374.06194.76003.42724.12534.82353.42724.12534.82353.49074.18884.88693.49074.18884.88693.55414.25234.95043.55414.25234.95043.61764.31575.01393.61764.31575.01393.68114.37925.07733.6811

5、4.37925.07733.74454.44275.14083.74454.44275.14083.80804.50615.20433.80804.50615.20433.87154.56965.26773.87154.56965.26773.93494.63315.33123.93494.63315.33123.99844.69655.39473.99844.69655.39474.06194.76005.4581精彩文檔實(shí)用標(biāo)準(zhǔn)文案5.45815.77556.02935.52165.77556.09285.52165.83896.09285.58515.83896.15635.58515.

6、90246.15635.64855.90246.21975.64855.96596.21975.71205.96596.28325.71206.02936.2832(3) 選用繪圖線性和顏色 clear all polt(x,y1,g+,x,y2,r:) grid on(4) 添加文字標(biāo)注 title( 正弦曲線和余弦曲線 ) ylabel( 幅度 ) xlabel( 時(shí)間 ) legend(sin(x),cos(x) gtext(leftarrowsinx)(5) 修改坐標(biāo)范圍。 axis equal精彩文檔實(shí)用標(biāo)準(zhǔn)文案 axis normal axis (0 pi 0 1.5)(6) 子圖

7、和特殊圖形繪制。 subplot(2,2,1) t1=0:0.1:3; y1=exp(-t1); bar(t1,y1); subplot(2,2,2) t2=0:0.2:2*pi; y2=sin(t2); stem(t2,y2); subplot(2,2,3) t3=0:0.1:3; y3=t3.2+1; stairs(t3,y3); subplot(2,2,4) t4=0:0.1:2*pi; y4=abs(cos(2*t4); polar(t4,y4);精彩文檔實(shí)用標(biāo)準(zhǔn)文案2. 三維曲線和三維曲面繪制(1) 三維曲線繪制使用 polt3 函數(shù)。繪制一條空間螺旋線 z=0:0.1:6*pi;

8、x=cos(z); y=sin(z); plot3(x,y,z);練習(xí)：利用子圖函數(shù)，繪制以上的空間螺旋線的俯視圖、左視圖和前視圖。(2)三維曲面圖的繪制： MATLAB繪制網(wǎng)線圖和網(wǎng)面圖的函數(shù)分別是mech( ) 和 surf( ),其具體操作步驟是：用函數(shù) meshgrid( )生成平面網(wǎng)格點(diǎn)矩陣X,Y;由 X,Y 計(jì)算函數(shù)數(shù)值矩陣Z ；用 mesh( ) 繪制網(wǎng)線圖，用 surf( ) 繪制網(wǎng)面圖。繪制橢圓拋物面： clear all,close all; x=-4:0.2:4; y=x; X,Y=meshgrid(x,y); Z=X.2/9+Y.2/9; mesh(X,Y,Z); title( 橢圓拋物面網(wǎng)線圖 )精彩文檔實(shí)用標(biāo)準(zhǔn)文案 figure(2) surf(X,Y,Z); title(橢圓拋物面網(wǎng)面圖)繪制闊邊帽面 clear all,close all; x=-7.5:0.5:7.5; y=x; X,Y=meshgrid(x,y); R=sqrt(X.2+Y.2)+eps; Z=sin(R)./R; mesh(X,Y,Z); title( 闊邊帽面網(wǎng)線圖 ) figure(2) surf(X,Y,Z); title( 闊邊帽面網(wǎng)