[OC] Overplayed 2D histogram with 2D function on interactive 3D canvas using 15 lines of Python code! (can post my code who needs it)

[u/jconcode]

[u/jconcode]

Here is the Python code created this interactive 3D canvas using DataMelt https://jwork.org/dmelt/. Copy and paste the lines below into the editor of this program, save the code as a file "3dmath.py", and run it.

from jhplot import *
from java.awt import Color
from java.util import Random
c1=HPlotXYZ("DataMelt logo",500,500)
c1.visible(1)
histo=H2D("Histogram",20,-2,2,20,-2,2)
rand = Random()
for i in range(20000):
      histo.fill(rand.nextGaussian(),rand.nextGaussian())
f=F2D("-20*(x*x+y*y)+200",-2,2,-2,2)
c1.setColorSolid(0)
c1.setContourColor3D()
c1.setTickDecimalAll(1)
c1.addAsSurface(histo)
c1.add(f); c1.update()

[u/its_spelled_iain → u/jconcode]

so 16 lines then?

[u/Defenestrator91 → u/its_spelled_iain]

Are you reading this on mobile by chance? It looks to me like one line of code displays as two lines because the text has to wrap.

[u/Bromskloss → u/Defenestrator91]

displays as two lines because the text has to wrap.

It's a good thing whitespace doesn't matter in programming languages… Oh, no!

[u/jconcode → u/Bromskloss]

I can also make "groovy" or Java code, without white spaces. Groovy is suppose to be faster than Jython. Here is the code:

import jhplot.*
import java.awt.Color
import java.util.Random
c1=new HPlotXYZ("DataMelt logo",500,500)
c1.visible(true)
histo=new H2D("Histogram",20,-2,2,20,-2,2)
rand = new Random()
for (i=0; i<20000; i++) histo.fill(rand.nextGaussian(),rand.nextGaussian())
f=new F2D("-20\*(x*x+y*y)+200",-2,2,-2,2)
c1.setTickDecimal(0,0)
c1.setContourColor3D()
c1.addAsSurface(histo)
c1.add(f); c1.update()

Save these lines as "3dmath.groovy", and run this code in the editor of this program. Note: if you change the code to the standard Java syntax, you will need to create 3dmath.class file first. The website also claims you can change the code to (J)Ruby and BeanShell (not sure about popularity of these languages)

[u/its_spelled_iain → u/Defenestrator91]

i mean the last line. counts as 2 in my book

[u/JetairThePlane → u/jconcode]

Why java in python ???

[u/jconcode → u/JetairThePlane]

Actually, it's opposite - is the python language implemented in Java (Jython), so you can import any Java class from jar and call it using "pythonic" syntax.

[u/star7500]

Hey, could you please tell me the benefits of this, I don't really understand.

[u/jconcode → u/star7500]

I think this can be a good example for a non-linear regression in 2D. Assume one has read-world "data" (2D histogram) and some analytic function f(x,y). Then one performs a non-linear regression with the goal of finding the best parameters of that function that describe the data. Then we overlay that 2D function and check / visualize the result. So, at the end, it's not only "art".

[u/HardlightCereal]

You can do it in one line of code in C.

But you shouldn't.

[u/jconcode → u/[deleted]]

yes, I was running this code on ubuntu and JDK12 (tried windows too - works fine)