在MATLAB图中用值标记点 [英] Mark points with a value in a MATLAB plot

问题描述

以下命令的确用正方形标记了点，但未在其中放置值(例如，(21,0)，...).

The following command does mark the points with a square, but it does not put a value in (for example, (21,0), ...).

X = [21 8 2 1 0]

Y = [0 1 2 3 4]

plot(X,Y,'k-s')

我应该添加哪个参数，以便所有5点值都出现在图中?

Which parameter should I add so all 5 point values come on the plot?

由于值是随机数，因此不能一一键入，因为它们可以更改.

The values can't be typed one by one as they can change, because they are random numbers.

推荐答案

您可以使用功能 CELLSTR 和 STRTRIM 将坐标值格式化为字符串单元格数组并使用 TEXT 函数显示它们:

You can display text on your plot by using the functions NUM2STR, CELLSTR, and STRTRIM to format the coordinate values into a cell array of strings and using the function TEXT to display them:

strValues = strtrim(cellstr(num2str([X(:) Y(:)],'(%d,%d)')));
text(X,Y,strValues,'VerticalAlignment','bottom');

对于上面的示例数据，您的绘图将如下所示:

And your plot will look like this for the sample data above:

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