how do to plot points in different colors based on their labels in 2D and 3D?

Question

ahmed obaid 2017-7-2

1
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https://ww2.mathworks.cn/matlabcentral/answers/347115-how-do-to-plot-points-in-different-colors-based-on-their-labels-in-2d-and-3d

评论： Image Analyst 2017-7-2

Dear experiences...

Im trying to make a plot change its color based on data labels... according to follow: i'm having clustered data points and based on their cluster id (cluster) i need to colored points, so according to my example where clusters =7, i need to plot whole points to 7 colors..

then, i need to plot centroids points also in the same figure... in 2D and 3D in scatter plot, where X,Y and Z columns represent--> my X , Y and Z coordinates of my points,

Point Name     X_data      Y-Data      Z_data    class 
   p1            val        val         val       1
   p2            val        val         val       2
   p3            val        val         val       3
 etc...
  pn             val        val         val       7

then for centroids points :

the coordinates of centroids points are in X, Y and Z also 
cent_id       X     Y     Z           
 1           val    val   val
 2           val    val   val 
 ...
 7           val    val   val

.. So how can i plot these points in dots with different colors for both points and centroids .. and also plot points with labels ( p1, p2...etc) that appear in scatter plot instead of dot.

thanks

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Answer 1

Image Analyst 2017-7-2

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/347115-how-do-to-plot-points-in-different-colors-based-on-their-labels-in-2d-and-3d#answer_272697

Why can't you use gscatter()?

For text labels, use text():

text(x,y,txt) adds a text description to one or more data points in the current axes using the text specified by txt. To add text to one point, specify x and y as scalars in data units. To add text to multiple points, specify x and y as vectors with equal length.