geom_point size and colour and different axis limits with facet

[Manuel Spínola]

Dear list members,

2 questions:

I want to do a type of balloon plot with geom_point to show different size regarding a continuous variable for farms located at different locations (I am using geographic coordinates).

1. Is it possible to control for size and color  by a continuous variable in the geom_point?

p = ggplot(geo1, aes(x, y))
p + geom_point(aes(size = md)) + scale_size(name = "Indice", breaks = c(0.1, 0.5, 1, 5, 10, 50))

2. Is it possible to set 2 different limits in the x axis working with facet?

Thank you very much in advance.

Manuel

--
Manuel Spínola, Ph.D.
Instituto Internacional en Conservación y Manejo de Vida Silvestre
Universidad Nacional
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[Ista Zahn]

Hi Manuel,

Can you clarify your question (I'm not sure what you mean by "control
for size and color") and provide a reproducible example?

-Ista

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Ista Zahn
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[Manuel Spínola]

Thank you very much Ista.

Yes, I am attaching the data (indicegeo).

p = ggplot(geo1, aes(x, y))

p + geom_point(aes(size = md)) + scale_size(name = "Indice", breaks = c(0.1, 0.5, 1, 5, 10, 15, 20, 25, 50)) + theme_bw()

In the code I am setting the point size according to the variable md, but I also want the points to be in different colors (colour = md).

Regarding to the other question, the data set has 2 different groups (geographically different) and I would like to do 2 facets to show each group but with different limits for the x axis.  I am attaching a plot.

Best,

Manuel

[Ista Zahn]

Hi Manuel

On Mon, Oct 18, 2010 at 7:16 PM, Manuel Spínola <mspin...@gmail.com> wrote:
> Thank you very much Ista.
>
> Yes, I am attaching the data (indicegeo).

Great, thanks for the example.

>
> p = ggplot(geo1, aes(x, y))
> p + geom_point(aes(size = md)) + scale_size(name = "Indice", breaks = c(0.1,
> 0.5, 1, 5, 10, 15, 20, 25, 50)) + theme_bw()
>
> In the code I am setting the point size according to the variable md, but I
> also want the points to be in different colors (colour = md).

you just need to tell ggplot what you're telling me (literally!).

p + geom_point(aes(size = md, colour=md)) + scale_size(name =

"Indice", breaks = c(0.1, 0.5, 1, 5, 10, 15, 20, 25, 50)) + theme_bw()

>

> Regarding to the other question, the data set has 2 different groups
> (geographically different) and I would like to do 2 facets to show each
> group but with different limits for the x axis.  I am attaching a plot.

So you need a faceting variable.

p + geom_point(aes(size = md, color=md)) + scale_size(name = "Indice",
breaks = c(0.1, 0.5, 1, 5, 10, 15, 20, 25, 50)) + theme_bw() +
facet_grid(.~sitio, scales="free")

These are pretty standard features, have you browsed http://had.co.nz/ggplot2/?

-Ista

--

[Manuel Spínola]

Thank you very much Ista.

I made a mistake I used colour instead of color.  However, I still have an error message:

> p = ggplot(geo1, aes(x, y))

> p + geom_point(aes(size = md, color = md)) + scale_size(name = "Indice", breaks = c(0.1, 0.5, 1, 5, 10, 15, 20, 25, 50)) + theme_bw()
Error en data.frame(size = c(1.00288566953386, 1.04028941815279, 1.08704410392645,  :
  arguments imply differing number of rows: 9, 1, 56

And regarding to the second question I didn't know about the scale free, but I still have an error too:

> p + geom_point(aes(size = md, color=md)) + scale_size(name = "Indice",

+ breaks = c(0.1, 0.5, 1, 5, 10, 15, 20, 25, 50)) + theme_bw() +

+ facet_grid(.~sitio, scales="free")

Error en data.frame(size = c(1.00288566953386, 1.04028941815279, 1.08704410392645,  :
  arguments imply differing number of rows: 9, 1, 56

I think is when I combine scale_size and scales=free

Best,

Manuel

[Manuel Spínola]

Hi Ista,

I found that point_range color and scale_size don't work together.
Is that possible?

Best,

Manuel

On 18/10/2010 08:10 p.m., Ista Zahn wrote:

p + geom_point(aes(size = md, color=md)) + scale_size(name = "Indice",
breaks = c(0.1, 0.5, 1, 5, 10, 15, 20, 25, 50)) + theme_bw() +
facet_grid(.~sitio, scales="free")

[Dennis Murphy]

Hi Manuel:

Are you trying to coordinate the colors and sizes in the same legend? If so, then you need to give both scales the same name and the same set of breaks (Hadley mentioned this the other day in another post.)  Does this work?

p <- ggplot(geo1, aes(x = x, y = y, size = md, colour = md))
p + geom_point() + facet_wrap(~ sitio, scales = 'free') +
#    theme_bw() +

    scale_size(name = 'Indice',
                         breaks = c(0.1, 0.5, 1, 5, 10, 15, 20, 25, 50)) +

    scale_colour_gradientn(name = 'Indice', colours = topo.colors(9),

                         breaks = c(0.1, 0.5, 1, 5, 10, 15, 20, 25, 50)) +

    opts(axis.text.x = theme_text(size = 8, vjust = 1)) +
    opts(axis.text.y = theme_text(size = 8, hjust = 1))

Uncomment the line with theme_bw() if you want a white background instead.

HTH,
Dennis

--

[Manuel Spínola]

Thank you very much Dennis.

That is perfect.

Best,

Manuel