[R] Putting colours in ggplot facets

[phii m@iii@g oii phiiipsmith@c@]

Thanks for this. I was unable to install the gggrid package apparently 
because it is unavailable for my version of R (4.1.1 (2021-08-10)). But 
I found it here https://github.com/pmur002/gggrid/releases/tag/v0.1-0, 
copied the code into your code, and it worked very well.

On 2021-10-26 19:18, Paul Murrell wrote:
> Hi
> 
> Another alternative (using 'gggrid' to add a 'grid' rect grob as the
> background), just for the record ...
> 
> library(gggrid)
> 
> bgrect <- function(data, coords) {
>     rectGrob(gp=gpar(col=NA, fill=adjustcolor(data$fill[1], alpha=.3)))
> }
> 
> ggplot(df, aes(x=date, y=vari)) +
>     grid_panel(bgrect, aes(fill=geo)) +
>     scale_fill_manual(values=colr) +
>     geom_bar(stat="identity")+
>     facet_grid(est ~ geo)
> 
> Paul
> 
> On 26/10/2021 3:40 pm, phil using philipsmith.ca wrote:
>> Thanks for the suggestions. As it happens, I just a moment ago found a
>> solution. By adding the lines: ct$date <- 1 and ct$vari <- 1 
>> everything
>> works as I want it to.
>> 
>> Philip
>> 
>> On 2021-10-25 22:37, Ben Tupper wrote:
>>  > Hi,
>>  >
>>  > I don't quite follow what you want to achieve - colored backgrounds
>>  > for each panel? You could RSeek.org for some ideas on how to fish 
>> the
>>  > panels grobs out... 
>> https://rseek.org/?q=ggplot+facet+backgound+color 
>> <https://rseek.org/?q=ggplot+facet+backgound+color>
>>  >
>>  > https://rseek.org/?q=ggplot+facet+backgound+color 
>> <https://rseek.org/?q=ggplot+facet+backgound+color>
>>  >
>>  >
>>  > I can get sort of close by skipping the use of table ct and instead
>>  > filling the panels using your df table. But it doesn't color each
>>  > panel instead it colors each geo group.
>>  >
>>  > ggplot(df,aes(x=date,y=vari))+
>>  > geom_rect(aes(fill=geo),
>>  > xmin=-Inf,xmax=Inf,
>>  > ymin=-Inf,ymax=Inf,alpha = 0.3)+
>>  > scale_fill_manual(values=colr)+
>>  > geom_bar(stat="identity")+
>>  > facet_grid(est~geo)
>>  >
>>  >
>>  > You could add another column, composed of geo and est, and fill by
>>  > that...
>>  >
>>  > df <- dplyr::tibble(date,vari,geo,est) %>%
>>  > dplyr::mutate(colr = paste(geo, est))
>>  >
>>  > ggplot(df,aes(x=date,y=vari))+
>>  > theme(panel.background = element_rect(fill = colr)) +
>>  > scale_fill_manual(values=colr)+
>>  > geom_bar(stat="identity")+
>>  > facet_grid(est~geo)
>>  >
>>  > But it makes for a long set of labels on the scale bar thingy.
>>  >
>>  > I hope that helps.
>>  >
>>  > Ben
>>  >
>>  >
>>  > On Mon, Oct 25, 2021 at 9:08 PM <phil using philipsmith.ca> wrote:
>>  >>
>>  >> I am using ggplot2 and I want to use different colours for some
>>  >> facets.
>>  >> Here is a reprex:
>>  >>
>>  >> library(tidyverse)
>>  >> date <- as.numeric(c(2017,2017,2017,2017,2017,2017,2018,2018,
>>  >> 2018,2018,2018,2018,2019,2019,2019,2019,2019,2019))
>>  >> vari <- as.numeric(c(4.8,3.3,4.2,5.2,4.8,5.7,5.4,3.1,5.7,4.1,
>>  >> 3.1,1.5,4.5,4.4,2.8,2.0,2.1,2.2))
>>  >> geo <- as.factor(c("Canada","Canada","Nova Scotia",
>>  >> "Nova Scotia","Manitoba","Manitoba","Canada",
>>  >> "Canada","Nova Scotia","Nova Scotia","Manitoba",
>>  >> "Manitoba","Canada","Canada","Nova Scotia",
>>  >> "Nova Scotia","Manitoba","Manitoba"))
>>  >> est <- as.factor(c("Wages and salaries",
>>  >> "Gross mixed income","Wages and salaries",
>>  >> "Gross mixed income","Wages and salaries",
>>  >> "Gross mixed income","Wages and salaries",
>>  >> "Gross mixed income","Wages and salaries",
>>  >> "Gross mixed income","Wages and salaries",
>>  >> "Gross mixed income","Wages and salaries",
>>  >> "Gross mixed income","Wages and salaries",
>>  >> "Gross mixed income","Wages and salaries",
>>  >> "Gross mixed income"))
>>  >> df <- data.frame(date,vari,geo,est)
>>  >> ct <- unique(df[,c('est','geo')])
>>  >> colr=c("blue","forestgreen","red","lightblue",
>>  >> "brown","gold")
>>  >> p0 <- ggplot(df,aes(x=date,y=vari))+
>>  >> geom_rect(data=ct,aes(fill=geo),
>>  >> xmin=-Inf,xmax=Inf,
>>  >> ymin=-Inf,ymax=Inf,alpha = 0.3)+
>>  >> scale_fill_manual(values=colr)+
>>  >> geom_bar(stat="identity")+
>>  >> facet_grid(est~geo)
>>  >> p0
>>  >>
>>  >> I have tried several approaches and Googled for help, but to no 
>> avail.
>>  >> I
>>  >> am getting the error message: Error: Aesthetics must be either 
>> length
>>  >> 1
>>  >> or the same as the data (6): x and y
>>  >>
>>  >> Thanks for some help.
>>  >>
>>  >> Philip
>>  >>
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>> <http://www.R-project.org/posting-guide.html>
>> and provide commented, minimal, self-contained, reproducible code.