World: r3wp

I wonder what the implementation approach to the patient management 
dashboard would be.

create some type of self graphing widget perhaps

a face with a rate that grabs some data from an array

I don't think they're intended to be in real time.

Just more to provide a snapshot over time.

still, wouldn't it be a good approach? the rate could be once per 
hour, plus on demand updating

this way, if you really want realtime, it's a matter of adjusting 
the rate

I suspect it is unnecessary for the task at hand, and would complicate 
the task somewhat.

still, it would be a good demo :)

I'd love to see a demo of an overview of graphs updated in realtime 
from any source. any.

of any graph in any language or just Rebol?

well for starters Rebol, but what if you could mix data like that 
and then just display it, no matter if it's CVS, rebol blocks or 
something measured off the serial port from a physical device.

sounds like you want to make a rebol oscilloscope

Is the stock-market data available somewhere online?

actually I think the hardest part would be to display a pretty graph 
:-) retrieving data could be done from within the graph face

I don't know about raw stock data...

Temperature data is also good for that.

stock market data is available from yahoo I believe, but delayed 
by 15 mins or something

graham: an oscilloscope could be a bit too intensive :-)

Or sea-level (changes with tide and weather).

or Canvas release rates

Wind direction.

lol

release rates contra size in kB

I guess I'd better find some docs on the draw dialect and see how 
easily this could be done.

It could be nice to have general graphing tools for Rebol like RRDTool 
which is a very powerful (but complex) graphing package for Linux

A start:

view layout [box white effect [draw [pen black line 0x100 10x80 20x85 
30x50 40x60 50x65 60x55 70x40 80x50 90x20]]]

or gnuplot

To change data, you could do:
clear next find face/effect/draw 'line
append face/effect/draw data-block

show face

what about scatter plots ?

would be as easy to update ?

Is that points?

yes.

view layout [box white effect [draw [pen none fill-pen black circle 
10x80 4 circle 20x85 4 circle 30x50 4 circle 40x60 4 circle 50x65 
4 circle 60x55 4 circle 70x40 4 circle 80x50 4 circle 90x20 4]]]

Update is almost as easy, just put circle in front and radius (4) 
behind the coords.

Picking data online and show a graph could maybe be an one-liner. 
:-)
Only with REBOL! (TM)

do points have to be done with circles ?

I guess so. Isn't a dot on a monitor a very small circle? Just change 
radius to 1 or 0.5 or something.

a dot on my monitor is a little square :)

:-) A one-pixel dot:

view layout [box white effect [draw [translate 0.5 0.5 anti-alias 
off pen none fill-pen black circle 50x50 0.5]]]

cool.

exactly one pixel too.

Looking carefully at my laptop screen, it's a grid of square pixels.

The translate move the center of the circle into the middle of a 
pixel. Radius of 0.5 then means, the circle won't go into neighbour 
pixels.

Perhaps you can incorporate a graphing module in Canvas :)

Without the translate, 4 pixels would be black.

Graham, certainly! :-)