Line Plots

Theplotfunction creates simple line plots ofxandyvalues.

x = 0:0.05:5; y = sin(x.^2); figure plot(x,y)

Line plots can display multiple sets ofxandydata.

y1 = sin(x.^2); y2 = cos(x.^2); plot(x,y1,x,y2)

Bar Plots

Thebarfunction creates vertical bar charts. Thebarhfunction creates horizontal bar charts.

x = -2.9:0.2:2.9; y = exp(-x.*x); bar(x,y)

Stairstep Plots

Thestairsfunction creates a stairstep plot. It can create a stairstep plot of Y values only or a stairstep plot ofxandyvalues.

x = 0:0.25:10; y = sin(x); stairs(x,y)

Errorbar情节

Theerrorbarfunction draws a line plot ofxandyvalues and superimposes a vertical error bar on each observation. To specify the size of the error bar, pass an additional input argument to theerrorbarfunction.

x = -2:0.1:2; y = erf(x); eb = rand(size(x))/7; errorbar(x,y,eb)

Polar Plots

Thepolarplotfunction draws a polar plot of the angle values intheta(在radians) versus the radius values inrho.

theta = 0:0.01:2*pi; rho = abs(sin(2*theta).*cos(2*theta)); polarplot(theta,rho)

Stem Plots

Thestemfunction draws a marker for eachxandyvalue with a vertical line connected to a common baseline.

x = 0:0.1:4; y = sin(x.^2).*exp(-x); stem(x,y)

Scatter Plots

Thescatterfunction draws a scatter plot ofxandyvalues.

loadpatientsHeightWeightSystolic散射(身高、体重)包含('Height') ylabel('Weight')

Use optional arguments to thescatterfunction to specify the marker size and color. Use thecolorbarfunction to show the color scale on the current axes.

scatter(Height,Weight,20,Systolic) xlabel('Height') ylabel('Weight') colorbar