Creating beautiful charts with JRuby and JFreeChart

#1

Post by headius » Wed, Apr 30, 2025, 8:30 PM UTC

Creating beautiful charts with JRuby and JFreeChart
blog.headius.com

Re: Creating beautiful charts with JRuby and JFreeChart

#2

Post by headius » Wed, Apr 30, 2025, 8:30 PM UTC

Why use C, Python, or JavaScript to generate charts for your Ruby applications? Use JRuby and it's so much easier!

Re: Creating beautiful charts with JRuby and JFreeChart

#3

Post by npongratz » Thu, May 01, 2025, 9:03 PM UTC

> Everyone loves pie!

Oh gosh, no! Count me among those who greatly dislike pie charts in almost every context.

"Almost never use a pie chart for data"

https://theconversation.com/heres-why-you-should-almost-neve...

https://news.ycombinator.com/item?id=38912534

Re: Creating beautiful charts with JRuby and JFreeChart

#4

Post by knowitnone » Thu, May 01, 2025, 9:21 PM UTC

article complains about a ruby gem(Charty) calling a python library(matplotlib) yet author is running Ruby in Java so they can access some Java library!

Re: Creating beautiful charts with JRuby and JFreeChart

#5

Post by dismalaf » Thu, May 01, 2025, 9:39 PM UTC

https://github.com/ruby-numo/numo-gnuplot

There's always good 'ol Gnuplot and it's many wrappers... This one looks nice.

Re: Creating beautiful charts with JRuby and JFreeChart

#6

Post by vidarh » Thu, May 01, 2025, 9:40 PM UTC

knowitnone wrote: post #4

article complains about a ruby gem(Charty) calling a python library(matplotlib) yet author is running Ruby in Java so they can access some Java library!

I don't even like Java/JVM, and I still think that is more reasonable than running a gem that embeds Python.

Re: Creating beautiful charts with JRuby and JFreeChart

#7

Post by tasuki » Thu, May 01, 2025, 10:03 PM UTC

Wow, the first chart on that web page is really, really ugly. It has these weird 3-d effects that look like from 2001. All it's missing are reflections...

Re: Creating beautiful charts with JRuby and JFreeChart

#8

Post by mberning » Thu, May 01, 2025, 10:05 PM UTC

headius wrote: post #2

Why use C, Python, or JavaScript to generate charts for your Ruby applications? Use JRuby and it's so much easier!

Thank you for all your work on JRuby. I love it.

Re: Creating beautiful charts with JRuby and JFreeChart

#9

Post by brightball » Thu, May 01, 2025, 10:10 PM UTC

That’s really impressive! Not the chart itself, but seeing how easy it is to use any existing Java library from within a Ruby codebase is super cool.

Ruby already has a pretty incredible gem ecosystem but having all things Java available too really adds tremendous utility.

Love JRuby. Thanks for all of the hard work headius!

Re: Creating beautiful charts with JRuby and JFreeChart

#10

Post by omneity » Thu, May 01, 2025, 10:10 PM UTC

tasuki wrote: post #7

Wow, the first chart on that web page is really, really ugly. It has these weird 3-d effects that look like from 2001. All it's missing are reflections...

I read your comment first and was like it can’t be that bad. I then opened the page, scrolled frantically down and boy oh boy were you right.