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HS-public
flot
Commits
04254b92
Commit
04254b92
authored
Jul 16, 2012
by
David Schnur
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Cleanup and markup standardization.
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FAQ.md
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04254b92
Frequently asked questions
--------------------------
## Frequently asked questions ##
Q: How much data can Flot cope with?
------------------------------------
A:
Flot will happily draw everything you send to it so the answer
#### How much data can Flot cope with? ####
Flot will happily draw everything you send to it so the answer
depends on the browser. The excanvas emulation used for IE (built with
VML) makes IE by far the slowest browser so be sure to test with that
if IE users are in your target group (for large plots in IE, you can
...
...
@@ -15,36 +14,36 @@ downsampling/aggregation as this is near the resolution limit of the
chart anyway. If you downsample server-side, you also save bandwidth.
Q: Flot isn't working when I'm using JSON data as source!
---------------------------------------------------------
A
: A
ctually, Flot loves JSON data, you just got the format wrong.
#### Flot isn't working when I'm using JSON data as source! ####
Actually, Flot loves JSON data, you just got the format wrong.
Double check that you're not inputting strings instead of numbers,
like
[
["0", "-2.13"
]
,
[
"5", "4.3"
]
]. This is most common mistake, and
the error might not show up immediately because Javascript can do some
conversion automatically.
Q: Can I export the graph?
--------------------------
A:
You can grab the image rendered by the canvas element used by Flot
#### Can I export the graph? ####
You can grab the image rendered by the canvas element used by Flot
as a PNG or JPEG (remember to set a background). Note that it won't
include anything not drawn in the canvas (such as the legend). And it
doesn't work with excanvas which uses VML, but you could try
Flashcanvas.
Q: The bars are all tiny in time mode?
--------------------------------------
A:
It's not really possible to determine the bar width automatically.
#### The bars are all tiny in time mode? ####
It's not really possible to determine the bar width automatically.
So you have to set the width with the barWidth option which is NOT in
pixels, but in the units of the x axis (or the y axis for horizontal
bars). For time mode that's milliseconds so the default value of 1
makes the bars 1 millisecond wide.
Q: Can I use Flot with libraries like Mootools or Prototype?
------------------------------------------------------------
A:
Yes, Flot supports it out of the box and it's easy! Just use jQuery
#### Can I use Flot with libraries like Mootools or Prototype? ####
Yes, Flot supports it out of the box and it's easy! Just use jQuery
instead of $, e.g. call jQuery.plot instead of $.plot and use
jQuery(something) instead of $(something). As a convenience, you can
put in a DOM element for the graph placeholder where the examples and
...
...
@@ -56,9 +55,9 @@ libraries, see the documentation in jQuery ("Using jQuery with other
libraries") for details.
Q: Flot doesn't work with [insert name of Javascript UI framework]!
-------------------------------------------------------------------
A:
Flot is using standard HTML to make charts. If this is not working,
#### Flot doesn't work with [insert name of Javascript UI framework]! ####
Flot is using standard HTML to make charts. If this is not working,
it's probably because the framework you're using is doing something
weird with the DOM or with the CSS that is interfering with Flot.
...
...
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