使用Matlab进行基本绘图

Matlab常用与科学计算和分析，其中Matlab内置的图形绘制功能也是相当的强大。本例分享使用Matlab的基本绘图功能。

工具/原料

Matlab

plot绘制二维图形

1、使用plot函数绘制正弦曲线。x轴：x=0:pi/10:2*pi;设置x轴为0到2pi的范围，y：y=sin（x）,绘图：plot(x,y);

plot3，mesh，surf，surfc绘制三维图

1、plot3 Plot lines and points in 3-D space. plot3() is a three-dimensional analogue of PLOT(). plot3(x,y,z), where x, y and z are three vectors of the same length, plots a line in 3-space through the points whose coordinates are the elements of x, y and z. plot3(X,Y,Z), where X, Y and Z are three matrices of the same size, plots several lines obtained from the columns of X, Y and Z. Various line types, plot symbols and colors may be obtained with plot3(X,Y,Z,s) where s is a 1, 2 or 3 character string made from the characters listed under the PLOT command. plot3(x1,y1,z1,s1,x2,y2,z2,s2,x3,y3,z3,s3,...) combines the plots defined by the (x,y,z,s) fourtuples, where the x's, y's and z's are vectors or matrices and the s's are strings.

2、plot3示例：t=0:pi/50:6*pi;plot3(t.*sin(3*t),t.*cos(3*t),t)grid

4、surf函数：k = 5;n = 2^k-1;[x,y,z] = sphere(n);c = hadamard(2^k);surf(x,y,z,c);colormap([1 1 0; 0 1 1])axis equal

bar，barh绘制条形图

1、bar：y = [75.995 91.972 105.711 123.203 131.669 ... 150.697 179.323 203.212 226.505 249.633 281.422];figure; bar(y);

area区域图

1、area：Y = [1, 5, 3;3, 2, 7;1, 5, 3;2, 6, 1];area(Y)grid oncolormap summerset(gca,'Layer','top')title 'Stacked Area Plot'

hist，rose等函数绘制直方图

1、x = -4:0.1:4;y = randn(10000,1);hist(y,x)