Epoch – A real-time charting library

Looks nice. It&#x27;s great to see more d3-based charting libraries. I&#x27;m personally using Rickshaw[0] to power the charting of Giraffe[1], a light weight front-end for Graphite. Sorry for the plug, but it&#x27;s important to give some context.<p>One obvious thing that felt like Epoch was missing was hover-over info. At least I couldn&#x27;t spot it on the examples.<p>[0]<a href="https://github.com/shutterstock/rickshaw" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;shutterstock&#x2F;rickshaw</a> [1]<a href="https://github.com/kenhub/giraffe" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;kenhub&#x2F;giraffe</a>

Looks really nice. Since I started using React, though, I&#x27;ve wanted to find a similarly nice charting library that is reactive instead -- that renders to a React component with SVG instead of mutating the DOM directly. This would help minimize the number of DOM updates when just a few data points change, and seems like it would fit better within a React app.<p>(This approach unfortunately rules out D3, which mutates the DOM directly and doesn&#x27;t have smart diffing AFAIK).<p>Anyone know of a reactive charting library?

I&#x27;ve just finished up a project using NVD3, and at first glance this looks like a slightly simpler option. This is a good thing - NVD3 has become complex to the point where I would recommend someone to just learn D3 rather than use a reusable library.<p>Epoch appears to be a good alternative for people who just want to quickly build charts for today&#x27;s web. Great work.

Again, something which all of these projects ignore, no step chart and no way to have gaps for missing data.

Very smooth animation, but those colors ... ech ... I wish it had the color and style customization that Highcharts offers, for example gradient fills and opacity support ... or rather I wish Highcharts update animations were this smooth.

this is great. i like the variety of graphs, especially heatmap. however, it&#x27;d be great to have hover effects and interactive legends with these time-series like in rickshaw and dygraphs.

This looks great. How do I plot a timeline where values are sum of all values that lie within a time unit, say, 1 day&#x2F;1 hour?

It looks really good, although one slightly confusing thing is that the static line graph appears to be smoothed but the real time one is unsmoothed and there isn&#x27;t a configuration option listed to change that?

Are there any charting libraries that do 2D and 3D both? If not, are there separate 2D and 3D libraries with a consistent and modern look and feel?

Would you recommend this over FusionCharts for personal projects? (BTW FusionCharts is free for personal use)

Another time line graphing library without things like moving averages that I want. :&#x2F;

i don&#x27;t see any example how to plot real-time chart using http api - therefore this &#x27;real-time&#x27; is not that useful.

the killer feature for me in a charting library is the ability to have multiple Y-axis scales. Say I want to have three time-series, so I am plotting efficiency in %, power in megawatts and flow in m3&#x2F;s on the Y-axis and time on the x-axis, three Y-axis scales are required.<p>Usually I end up with multiple charts or some SCADA program has made it so the Y-axis scale changes when you select a series if there is only 1 chart.

It&#x27;d be great to know on that front page what language it is in. Without having to browse into the git repository or extract the zip distribution.

&quot;Built for Developers&quot; - well, I certainly hope so!<p>Who else would a JavaScript library be built for?

Why use a common name that have a different meaning ?

it seems good but more content is advisable.