On 09/05/2012 10:46 AM, Gary Dong wrote:
Thanks, Duncan.
I tried axis(). It appears it allows you to add an axis, but does not
say you can plot a second Y in the graph. Maybe I'm understanding it
correctly. Any help will be appreciated!
I don't understand what you want. Could you give an example that comes
close, and explain what is wrong with it?
Duncan Murdoch
Gary
On Wed, May 9, 2012 at 7:26 AM, Duncan Murdoch
<murdoch.dun...@gmail.com <mailto:murdoch.dun...@gmail.com>> wrote:
On 08/05/2012 3:23 PM, Gary Dong wrote:
Dear R users,
I'm plotting housing prices in City A over past 30 years in
ggplot2. The Xs
are years since 1980. I have two housing price variables: new
home prices
and old home prices, both of them measured by $/sqft. I have
searched
related threads on multiple Y axes in ggplot2 and I understand
that
multiple Y axes in different scales are not possible. I'm
wondering if it
is possible to have multiple Y axes with the same scale in
ggplot2, like in
my case. If still not possible, is there a easy way to do it
in R's default
plot function? Thanks.
In base graphics, you can have as many axes as you like,
displaying anything. Use the axis() function. See ?axis for the
arguments that determine placement, ticks, etc.
I would guess the same flexibility is there in ggplot2, but I
don't know how to do it.
Duncan Murdoch
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