如何自定义在MATLAB离散函数情节？

Question

我想绘制在MATLAB离散值是这样的：

和stairs()使stem()重复相似但我可以配置它们中的一个看起来像上面的图像？

http://www.mathworks.com/help/techdoc /ref/plottype-stairs.gif http://www.mathworks.com/help/techdoc/ref/ plottype-stem.gif

Answer 1

您必须创建自己的情节。

%# create some random data
data = randn(100,1);

%# sort ascending
data = sort(data(:)); %# make column vector, just in case

%# count
nData = length(data);

%# create data to plot (open, closed circles)
yData = linspace(0,1,nData-1)'; %'# SO formatting

closedX = data(1:end-1);
closedY = yData;

openX = data(2:end);
openY = yData;

%# lines are from open to close with NaN for where there should be no line
lineX = [closedX,openX,NaN(nData-1,1)]'; %'# SO formatting
lineX = lineX(:);
lineY = [closedY,openY,NaN(nData-1,1)]'; %'# SO formatting
lineY = lineY(:);

%# plot
figure %# I like to open a new figure before every plot
hold on
plot(lineX,lineY,'r')
plot(closedX,closedY,'ro','MarkerFaceColor','r')
plot(openX,openY,'ro','MarkerFaceColor','w')