textscatter example, and behavior, is mysterious

The code for the textscatter example at

textscatter - 2-D scatter plot of text - MATLAB

looks like it should produce text at those random points. Instead the figure there shows some text in unusual places, some points that dont belong to any specific label, and in general, the whole thing is mysterious.

Answer 1

[Torsten]

Most probably, text is set where possible and the rest positions are marked by blue points.

The following example seems to support this:

rng("default")
n = 11;
x = rand(n,1);
y = rand(n,1);
str = string(1:n);
figure
textscatter(x,y,str);

% Print positions of str(6) and str(9) which is not shown
[x(6),y(6)]

ans = 1×2

0.0975 0.4218

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[x(9),y(9)]

ans = 1×2

0.9575 0.9595

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Info from AI:

Key Features and Behaviors

• Automatic Readability: By default, textscatter may not display all input words to avoid overcrowding, replacing less important labels with markers.
• Data Density Management: The TextDensityPercentage parameter controls what percentage of text data is displayed (default is 60%).

So to plot all text markers in the above example, you could use

textscatter(x,y,str,'TextDensityPercentage',100);

Answer 2

[Matt J]

Here's an alternative, whose behavior you might like better:

rng("default")
n = 11;
x = rand(n,1);
y = rand(n,1);
str = string(1:n);
figure
H=scatter(x,y,'.');
scatlabel(H,string(1:n))