Rescale points plotted using scatter3 based on their distance from the origin

1 次查看（过去 30 天）
James Peach
James Peach 2020-9-28
评论： James Peach 2020-9-28
I wanted to know if its possible to rescale the markersizes used in scatter3 based on the marker's distance from the origin (0,0,0). I would like to make it so that if a point is closer to center then it is larger than the next point closests to it. Basically, I am hoping to have the largest points closer to the center and the smallest points farther away.
Here is the set of points that I am trying to rescale their markers. the biggest marker should be at (0,0,0) and then the rest should get smaller as they moved away from the center.
A = [0 0 0
0.00977495601952172 0.0129188554738323 0.999868768093125
-0.566794094824837 -0.823750570492204 0.0133959578031223
0.0279587435128966 0.0380588867245362 1.99938731654588
0.830388266617646 0.583999369869120 0.978401571089338
-1.07826433834531 -1.64452537544960 0.267810795303313
0.168715496407312 0.263085998125572 2.96351922435162
-0.791458202545459 0.611268411797120 0.998070417818667
-1.41124221175034 -0.289407593850698 0.0506110237693017
1.69942938355116 1.04462646221878 1.15892918358242
-1.55216375501531 -2.44987966243271 0.623934110066297
0.188310075544404 0.501770043093754 3.93441879647330
-1.44603145623221 1.35107113546187 1.15371676572365
-2.35391403973316 0.0183196401577155 0.179737992978120
2.59879677816763 1.38804628951095 1.42948622326796
-1.92629974765512 -3.28302931738291 1.03122259685150
0.190461468181228 0.731318108759712 4.90771374511875
-2.01837467713375 2.14014570650778 1.37684130228734
-3.30531517848174 0.217844651708771 0.414313445558867
3.50709118523837 1.65551615551852 1.75113998255253
-2.23204460424917 -4.13488361866807 1.45650407075820
0.193343935566412 0.934427321909631 5.88686559182864
-2.51244231909718 2.97180232130260 1.63030617210704
-4.25650570961388 0.357419056329789 0.689550723301627
4.41845060685608 1.87363023778730 2.10021053665969];

请先登录，再回答此问题。

采纳的回答

Turlough Hughes
Turlough Hughes 2020-9-28
编辑：Turlough Hughes 2020-9-28
Yes. Firstly get distances from the origin:
d = sqrt(sum(A.^2,2));
If you have the machine learning & statistics toolbox, you might prefer to use the pdist2 function. Next you need to define an equation where size decreases for increasing values of d, obviously you can define that how you like the following is just an example of one way you could do it:
sz = 5*(max(d) - d + 1) % some function do describe size w.r.t distance from O.
Then its just a case of inputting that into scatter3
scatter3(A(:,1),A(:,2),A(:,3),sz,'fill')
  5 个评论
显示 3更早的评论
Turlough Hughes
Turlough Hughes 2020-9-28
You could do it as follows
scatter3(x,y,z,sz,d,'filled')
If you specifically want three groups of color based on the distance, d, you can modify the colormap:
colormap([1 0 0; 0 1 0; 0 0 1])

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Blue 的更多信息

标签

产品


版本

R2019a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by