# Dynamic diagram **URL:** \ **Category:** Ruby\ **Created:** [September 5, 2006, 11:35am UTC](https://www.ruby-forum.com/t/dynamic-diagram/67577 "2006-09-05T11:35:50Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![dracos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ea666f/32.png) [@dracos](https://www.ruby-forum.com/u/dracos)\ **Post date:** [September 5, 2006, 11:35am UTC](https://www.ruby-forum.com/t/dynamic-diagram/67577/1 "2006-09-05T11:35:50Z")
Hi, I want to show a measurement value in a diagram. The problem is that the diagram should be visible, when new values are added into the diagram. There is round about one value per minute. Does anyone has some advice ? Thanks Peter ---
**Author:** ![dracos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ea666f/32.png) [@dracos](https://www.ruby-forum.com/u/dracos)\ **Post date:** [September 5, 2006, 4:34pm UTC](https://www.ruby-forum.com/t/dynamic-diagram/67577/2 "2006-09-05T16:34:54Z")
Peter M. wrote: > I want to show a measurement value in a diagram. > > The problem is that the diagram should be visible, when new values are > added into the diagram. There is round about one value per minute. By “diagram” do you mean “chart”? If so, use BLT (which I think only binds with Python or something). If you actually mean a diagram, like a graph, with circles and arrows, try this: [http://wiki.rubygarden.org/Ruby/page/show/SvgCanvas](http://wiki.rubygarden.org/Ruby/page/show/SvgCanvas) Updating it in real-time should only require a little work. I have bench-versions which do that, so if you actually need it ping me privately. ---
**Author:** ![dracos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ea666f/32.png) [@dracos](https://www.ruby-forum.com/u/dracos)\ **Post date:** [September 5, 2006, 5:27pm UTC](https://www.ruby-forum.com/t/dynamic-diagram/67577/3 "2006-09-05T17:27:04Z")
Phlip wrote: > [http://wiki.rubygarden.org/Ruby/page/show/SvgCanvas](http://wiki.rubygarden.org/Ruby/page/show/SvgCanvas) > > Updating it in real-time should only require a little work. I have > bench-versions which do that, so if you actually need it ping me privately. Since SVG using progressive rendering and the “painters model”, you can actually start streaming an SVG file and just send new information when it’s available (if you can live with new content always drawing on top of old). Alternatively, you can use AJAXian style JS communication to poll and receive new data, modifying the SVG DOM on the fly to add new data. ---
**Author:** ![dracos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ea666f/32.png) [@dracos](https://www.ruby-forum.com/u/dracos)\ **Post date:** [September 5, 2006, 6:14pm UTC](https://www.ruby-forum.com/t/dynamic-diagram/67577/4 "2006-09-05T18:14:01Z")
Phrogz wrote: > Alternatively, you can use AJAXian style JS communication to poll and > receive new data, modifying the SVG DOM on the fly to add new data. SVG ain’t just for web pages. (I have barely researched how it’s used there!) ---
**Author:** ![dracos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ea666f/32.png) [@dracos](https://www.ruby-forum.com/u/dracos)\ **Post date:** [September 11, 2006, 5:49am UTC](https://www.ruby-forum.com/t/dynamic-diagram/67577/5 "2006-09-11T05:49:09Z")
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Peter M. wrote: > I want to show a measurement value in a diagram. > > The problem is that the diagram should be visible, when new values are > added into the diagram. There is round about one value per minute. Try the gnuplot extension for Ruby. You can add new values to the plot and watch it appear in real-time. I learned this from a friend who used it to easily visualize voltage readings from a microcontroller in real-time. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) iD8DBQFFBNx9mV9O7RYnKMcRAkpDAJ9h86cexkCc8pJq9E4KFGWkMGRsfQCgrXH6 IP89QyuzAwuSul9/VZeAf1Y= =2R3h -----END PGP SIGNATURE-----