[R] How to set colors, axis gap, and free scale in ggplot?

[Ron Crump]

What error?
Those are warning messages to do with your call to geom_bar. I've never
used geom_bar in that way, I'd create my summaries independently of
the graphing, so can't comment on how it should be used.

This simple example works fine for me:
```
library(ggplot2)
data(iris)
ggplot(iris) +
     geom_point(aes(x = Sepal.Width, y = Sepal.Length)) +
     facet_wrap(~ Species, nrow = 1) +
     theme(strip.text = element_text(size = 10,face = 'bold'))
```

Ron.


On 22/02/2022 14:25, Luigi Marongiu wrote:
> I am trying instead to increase the size with `theme(strip.text.x =
> element_text(size = 10))` (evem from 1 onwards) or `theme(strip.text.x
> = element_text(face = "bold"))` but it gives an error (same in both
> cases, even when using `strip.text`):
> ```
> No summary function supplied, defaulting to `mean_se()`
> No summary function supplied, defaulting to `mean_se()`
> No summary function supplied, defaulting to `mean_se()`
> No summary function supplied, defaulting to `mean_se()`
> No summary function supplied, defaulting to `mean_se()`
> No summary function supplied, defaulting to `mean_se()`
> No summary function supplied, defaulting to `mean_se()`
> No summary function supplied, defaulting to `mean_se()`
> Warning messages:
> 1: Ignoring unknown parameters: fun.y
> 2: Removed 24 rows containing non-finite values (stat_summary).
> 3: Removed 24 rows containing non-finite values (stat_summary).
> 4: Removed 24 rows containing missing values (geom_point).
> 
> On Tue, Feb 22, 2022 at 12:41 PM Ron Crump <r.e.crump using warwick.ac.uk> wrote:
>>
>> Hi Luigi,
>>
>>> # FROM HERE IT DOES NOT WORK
>>> facet_grid(. ~ Species, scales="free_y") + # THE SCALE IS FIXED FOR ALL PANELS
>>
>> I don't think you can force facet_grid to do this: the y scale will
>> always be fixed within a row (unless someone else tells you differently,
>> I may have misunderstood this)  - this is to allow easy comparison and,
>> consequently, comprehension of the graphic as you scan across a row.
>>
>> You can achieve what you want with:
>> facet_wrap(~ Species, nrow = 1, scales = "free_y")
>> but for the reason above, I'm not sure it's a good thing to do.
>>
>>> scale_colour_manual(values = c("palegreen4", "orangered3")) # THE
>>> COLORS ARE AUTOMATIC
>>
>> You're setting the colour manually - which relates to lines, not fill
>> and you have no colour aesthetic set, just a fill one.
>>
>> Use scale_fill_manual(values = c("palegreen4", "orangered3")) instead.
>>
>>> I would also like to increase the size of the axis labels and the
>>> title size of the panels.
>>> What is the correct syntax?
>>
>> See ?theme - you are interested in axis.title (maybe axis.title.x,
>> axis.title.y) and strip.text (the labels for the facets). See also
>> ?element_text as in theme, you basically want to put something like
>> axis.title = element_text(...), replacing ... with the settings you
>> want.
>>
>> For help specifically on ggplot2 and other tidyverse packages, I'd
>> recommend using https://community.rstudio.com in the future.
>>
>> Best wishes,
>> Ron.
>>
> 
>