Duncan:
I must humbly disagree. Here's the problem: in order to accurately
represent the value, the point = circle _area_ must be proportional
to the value. That is, the eye sees the areas, not the radii, as the
point size. A delightful reference on this is Howard Wainer's 1982
or so (can't
On Thu, 13 Jan 2011, Bert Gunter wrote:
Duncan:
I must humbly disagree. Here's the problem: in order to accurately
represent the value, the point = circle _area_ must be proportional
to the value. That is, the eye sees the areas, not the radii, as the
point size. A delightful reference on this
On Wed, Jan 12, 2011 at 9:33 PM, John Sorkin
jsor...@grecc.umaryland.edu wrote:
I would like to plot 3-dimensional data on a two-dimensional scatter-plot.
Is there a way I can automatically modify the plot symbol (e.g. changing size
or color) to indicate the value of a third variable? E.g. How
have you taken a look at the hexbin package? 'cex' , 'pch' 'col' will let you
make the changes
Sent from my iPad
On Jan 12, 2011, at 21:33, John Sorkin jsor...@grecc.umaryland.edu wrote:
I would like to plot 3-dimensional data on a two-dimensional scatter-plot.
Is there a way I can
I would like to plot 3-dimensional data on a two-dimensional scatter-plot.
Is there a way I can automatically modify the plot symbol (e.g. changing size
or color) to indicate the value of a third variable? E.g. How can I plot weight
vs. age and indicate the value of muscle mass for each value
You don't give an example, but in general you can use a vector for cex with
the values proportional to the third variable.
Same goes for color: col can be a vector, not just a single value.
This has been discussed before on-list, and fairly recently.
Sarah
On Wed, Jan 12, 2011 at 2:19 PM, John
Look at the symbols function for some options of doing what you suggest (you
can also do a search for bubble plot for a couple of other implementations).
If you want to go a bit further than what symbols does for you then look at the
my.symbols function in the TeachingDemos package.
--
Google on R Graph Gallery to find examples with code.
You can also almost certainly RSiteSearch() on appropriate keys to
find a pre-existing function (which someone may provideyou on the
list).
Also:
?symbols
-- Bert
On Wed, Jan 12, 2011 at 11:19 AM, John Sorkin
jsor...@grecc.umaryland.edu
I would like to plot 3-dimensional data on a two-dimensional scatter-plot.
Is there a way I can automatically modify the plot symbol (e.g. changing size
or color) to indicate the value of a third variable? E.g. How can I plot weight
vs. age and indicate the value of muscle mass for each value
On 11-01-12 9:33 PM, John Sorkin wrote:
I would like to plot 3-dimensional data on a two-dimensional
scatter-plot.
Is there a way I can automatically modify the plot symbol (e.g.
changing size or color) to indicate the value of a third variable? E.g.
How can I plot weight vs. age and
On 01/13/2011 06:19 AM, John Sorkin wrote:
I would like to plot 3-dimensional data on a two-dimensional scatter-plot.
Is there a way I can automatically modify the plot symbol (e.g. changing size
or color) to indicate the value of a third variable? E.g. How can I plot weight
vs. age and
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