Chart-script

[langhammer@gmail.com]

Hi,

anybody knows a good class who makes possible to create charts as
line-graph ?

Mostly I can find only classes to include with more as 50kilobytes. But
I need a small programm, because I have 750 users in one moment.

The most classes includes pie,circles,... so they are to big.

[Gerard]

Re: Chart-script

FusionChart has worked great for me. Uses xml...

[Malcolm Dew-Jones]

Re: Chart-script

langhammer@gmai l.com wrote:
: Hi,

: anybody knows a good class who makes possible to create charts as
: line-graph ?

: Mostly I can find only classes to include with more as 50kilobytes. But
: I need a small programm, because I have 750 users in one moment.

: The most classes includes pie,circles,... so they are to big.

Not clear what you have tried.

Do you mean a php class to create a gif/jpeg/etc image of a chart?
Or a Java class for an applet to display on the browser.
Or a Javascript class to do whatever it does.

Read up on gnuplot. It can create all sorts of graphs and output various
output formats. Being a compiled program it is fast to run. Since it
runs as a standalone program (i.e. not part of your application) then
there are no GPL licensing issues.

Display the graph as an image ( <img src="a-script.phgp" /> ). The php
script needs input which I don't show, either query params or session
data. Your php script will accept the input and prepare the gnuplot data
(typically just a few lines in a text file). Then your php shells out to
gnuplot with that as its input, gnuplot generates the binary image data
you need. I don't recall if gnuplot displays that data on stdout (in
which case you need do nothing) or whether you have to spool a work file,
but either way is pretty easy.


--

This programmer available for rent.

[Colin McKinnon]

Re: Chart-script

Malcolm Dew-Jones wrote:
[color=blue]
> langhammer@gmai l.com wrote:
>
> : anybody knows a good class who makes possible to create charts as
> : line-graph ?
>
> : Mostly I can find only classes to include with more as 50kilobytes. But
> : I need a small programm, because I have 750 users in one moment.
>
> : The most classes includes pie,circles,... so they are to big.
>
> Not clear what you have tried.
>
> Do you mean a php class to create a gif/jpeg/etc image of a chart?
> Or a Java class for an applet to display on the browser.
> Or a Javascript class to do whatever it does.
>
> Read up on gnuplot. It can create all sorts of graphs and output various
> output formats. Being a compiled program it is fast to run. Since it
> runs as a standalone program (i.e. not part of your application) then
> there are no GPL licensing issues.
>[/color]

Personally I use jpgraph (a large PHP include file). I think you might be
surprised at how well it scales compared with running gnuplot and the docs
are (IMHO) a lot easier to comprehend. Gnuplot *might* be better for
working with large datasets. If the data isn't very dynamic, jpgraphs
caching will definitely give it the edge.

C.