How to draw a large chart?

rubyonrails-talk
#1

I am meeting a big problem with charts.

I have to display a horizontal bar chart with ~3000 bars in ~5s. Assume
the input data are ready in the needed format.

I have tested open flash chart, gruff, scruffy... They all failed. With
1000 bars, open flash chart took 15-20s. Gruff and scruffy were worse.

Do you have any ideas?

#2

I am meeting a big problem with charts.

I have to display a horizontal bar chart with ~3000 bars in ~5s. Assume
the input data are ready in the needed format.

I have tested open flash chart, gruff, scruffy... They all failed. With
1000 bars, open flash chart took 15-20s. Gruff and scruffy were worse.

Do you have any ideas?

Sub the work out to gnuplot and have it generate the image maybe...

-philip

#3

I have tested open flash chart, gruff, scruffy... They all failed. With
1000 bars, open flash chart took 15-20s. Gruff and scruffy were worse.

Sub the work out to gnuplot and have it generate the image maybe...

Indeed: GnuPlot is the oldest and most professional of those plotters (some of which are only on the list because they got good press!).

Contrarily, GnuPlot is often very cranky to use and poorly documented. Too many features!

I wrote up how to use GnuPlot for log charts here:

   http://www.oreillynet.com/ruby/blog/2008/03/cruisecontrol_charts.html

Next, I would not inflict 1 000 bars on my uses. Could you find a way to cut the data down to useful segments? That's why I used log charts, for example!

#4

Thanks, man! I will try it.

If it is okie, i will feedback :slight_smile:

#5

Khiet Bui wrote:

Thanks, man! I will try it.

If it is okie, i will feedback :slight_smile:

But, how to draw a horizontal bar chart on gnuplot?