vignettes/absence_statistics.md
In ivyleavedtoadflax/govstyle: A ggplot2 theme in a gov.uk inspired style
title: "Absence and Exclusion Statistics"
author: Matthew Upson
date: "2016-07-26"
output: rmarkdown::html_vignette
vignette: >
%\VignetteIndexEntry{"Absence and Exclusion Statistics"}
%\VignetteEngine{knitr::rmarkdown}
\usepackage[utf8]{inputenc}
The govstyle package is designed to give your ggplot2 figures gov.uk friendly formatting.
At present the package consists of a single theme which can be applied to ggplots.
More functionality will be added in the future.
A real life example
In this vignette, we will reproduce two of the plots presented in the 2015 Statistical First Release (SFR) 39 from the Department for Education.
This SFR deals with statistics relating to student absence and exclusion, and is available for download here.
Getting the data
The first step is to download and prepare the data.
The SFR data are stored as a large (41.7 MB) CSV file within a zip file, which is available here.
Downloading and extracting the data can all be done in R
It's worth doing a quick check to ensure that this worked:
file.exists("SFR39_2015_Autumn_Spring_Proposed_SFR_structure.csv")
## [1] TRUE
## Should be 43776735 bytes:
file.info("SFR39_2015_Autumn_Spring_Proposed_SFR_structure.csv")$size
## [1] 43776735
We also need to install the govstyle package.
This vignette uses version v0.1.0 - leaving out this argument from devtools::install_github will fetch the latest commit on the master branch
devtools::install_github(
repo = "ivyleavedtoadflax/govstyle"
)
library(govstyle)
Loading and cleaning the data
If all has gone well, we can load the data and make some basic maniuplations.
For this we need both readr and dplyr:
library(readr)
library(dplyr)
Here I use the dplyr framework using the pipe %>% to combine a lot of cleaning tasks into a single block of code.
First I load the data from CSV using readr::read_csv(), then use dplyr::select() and dplyr::mutate() to subset the columns I am interested in, and convert character columns to
absence_data_full <- read_csv(
file = "SFR39_2015_Autumn_Spring_Proposed_SFR_structure.csv",
na = c( "x", ".", "")
) %>%
mutate(
Period = factor(Period),
Level = factor(Level),
Year = factor(Year),
Country = factor(Country),
School_type = School_type %>% tolower %>% factor
)
# For brevity of printing, select only columns of interest.
absence_data <- absence_data_full %>%
select(
Period, Level, Year, Country,
School_type, sess_possible, sess_overall
)
From a quick scan of the data, we can see that all the remaining character columns have been converted to factor, and we have two remaining numeric columns which are integer.
absence_data
## Source: local data frame [185,543 x 7]
##
## Period Level Year Country School_type
## (fctr) (fctr) (fctr) (fctr) (fctr)
## 1 Autumn and spring NATIONAL 2014/15 England state-funded primary
## 2 Autumn and spring NATIONAL 2014/15 England state-funded secondary
## 3 Autumn and spring REGION 2014/15 England state-funded primary
## 4 Autumn and spring REGION 2014/15 England state-funded secondary
## 5 Autumn and spring REGION 2014/15 England state-funded primary
## 6 Autumn and spring REGION 2014/15 England state-funded secondary
## 7 Autumn and spring REGION 2014/15 England state-funded primary
## 8 Autumn and spring REGION 2014/15 England state-funded secondary
## 9 Autumn and spring REGION 2014/15 England state-funded primary
## 10 Autumn and spring REGION 2014/15 England state-funded secondary
## .. ... ... ... ... ...
## Variables not shown: sess_possible (int), sess_overall (int)
Calculating Overall Absence Rate
To recreate the plots in the SFR, we first need to calculate the national overall absence rate (OAR), which is given as:
the total number of overall absence sessions for all pupils as a percentage of the total number of possible sessions for all pupils, where overall absence is the sum of authorised and unauthorised absence and one session is equal to half a day.
or:
$$
\text{Overall absence rate} = \frac{\text{Total Overall absence sessions}}{\text{Total sessions possible}}\times 100
$$
For this we need to subset the data and calculate this at the national level, and combine this calculation with the regional data
# Calculate the national OAR values.
oar_summary <- absence_data %>%
dplyr::filter(
Level == "NATIONAL"
) %>%
mutate(
oar = (sess_overall/sess_possible) * 100
)
# Calculate the OAR values for Period, Level, Year, and Country combinations
oar_summary_combined <- absence_data %>%
dplyr::filter(
Level == "NATIONAL"
) %>%
group_by(Period, Level, Year, Country) %>%
summarise(
sess_possible = sum(sess_possible),
sess_overall = sum(sess_overall)
) %>%
mutate(
oar = (sess_overall/sess_possible) * 100,
School_type = "state-funded primary and secondary"
)
# Combine the two above dataframes
oar_summary <- bind_rows(
oar_summary,
oar_summary_combined
)
Note that combining the two dataframes above leads to School_type being coerced to character.
This is not an issue for use here.
oar_summary
## Source: local data frame [27 x 8]
##
## Period Level Year Country School_type
## (fctr) (fctr) (fctr) (fctr) (chr)
## 1 Autumn and spring NATIONAL 2014/15 England state-funded primary
## 2 Autumn and spring NATIONAL 2014/15 England state-funded secondary
## 3 Autumn and spring NATIONAL 2013/14 England state-funded primary
## 4 Autumn and spring NATIONAL 2013/14 England state-funded secondary
## 5 Autumn and spring NATIONAL 2012/13 England state-funded primary
## 6 Autumn and spring NATIONAL 2012/13 England state-funded secondary
## 7 Autumn and spring NATIONAL 2011/12 England state-funded primary
## 8 Autumn and spring NATIONAL 2011/12 England state-funded secondary
## 9 Autumn and spring NATIONAL 2010/11 England state-funded primary
## 10 Autumn and spring NATIONAL 2010/11 England state-funded secondary
## .. ... ... ... ... ...
## Variables not shown: sess_possible (int), sess_overall (int), oar (dbl)
Creating the first plot
For the first plot, we also need the values from the start and end of the timeseries for inclusion in the plot.
oar_values <- oar_summary %>%
filter(
Year %in% c("2006/07","2014/15")
) %>%
arrange(Year)
oar_values
## Source: local data frame [6 x 8]
##
## Period Level Year Country
## (fctr) (fctr) (fctr) (fctr)
## 1 Autumn and spring NATIONAL 2006/07 England
## 2 Autumn and spring NATIONAL 2006/07 England
## 3 Autumn and spring NATIONAL 2006/07 England
## 4 Autumn and spring NATIONAL 2014/15 England
## 5 Autumn and spring NATIONAL 2014/15 England
## 6 Autumn and spring NATIONAL 2014/15 England
## Variables not shown: School_type (chr), sess_possible (int), sess_overall
## (int), oar (dbl)
To produce a nice plot ends up in quite a lot of code, so I will build up bit by bit.
library(ggplot2)
p <- oar_summary %>%
ggplot +
aes(
x = Year,
y = oar,
colour = School_type,
fill = School_type,
group = School_type
) +
geom_path(size = 1.5) +
xlab("Autumn and Spring term") +
ylab("Overall absence rate (%)")
This gives us our base plot
p
Government tends to like seeing zero on the y-axis, so lets fix the axes with expand_limits(), and add a title with ggtitle.
p1 <- p +
expand_limits(
x = 0,
y = c(0, 8.5)
) +
ggtitle(
"Overall absence rate across state-funded\nprimary and secondary schools"
)
p1
At this point I apply theme_gov(), and introduce a scale using colours from the gov.uk colour palette.
For this we can call check_pal()
check_pal()
p2 <- p1 +
theme_gov(
base_size = 12,
base_colour = "gray40") +
scale_colour_manual(
values = gov_cols[c("turquoise","brown","light_blue")] %>% unname
)
p2
theme_gov() removes the legend by default, so I'll label the lines instead.
This gets a little complicated here as we need to nudge the values into the correct place using the hjust and vjust arguments.
I also use the sprintf() command to force R to print a single decimal place, even if this number is zero - the default would be not to do this.
p3 <- p2 +
geom_text(
data = oar_values,
aes(
label = sprintf("%.1f", oar)
),
hjust = rep(c(1.35,-0.35), each = 3),
fontface = "bold"
)+
geom_text(
data = oar_summary %>% filter(Year == "2006/07"),
aes(
label = c(
"Primary",
"Secondary",
"Primary and secondary"
)
),
hjust = 0,
vjust = -1,
fontface = "bold"
)
p3
So this is pretty close to the final figure.
One thing we might want to do is rotate the y-axis label so that it reads horizontally
p4 <- p3 +
theme(
# plot.margin = grid::unit(
# c(0, 5, 5, 0), "mm"),
axis.title.y = element_text(
angle = 0
)
)
p4
Creating the second plot
Illness absence rates
Start with the full absence data. Filter to only NATIONAL values, then sum over years for the variables sess_overall, sess_possible, and sess_auth_illness. Then calculate the overall absence rate, and the illness absence rate, and finally gather this up into a long rather than a wide data.frame to allow easier plotting of colours
illness_summary <- absence_data_full %>%
dplyr::filter(Level == "NATIONAL") %>%
group_by(Year) %>%
summarise(
sess_overall = sum(sess_overall),
sess_possible = sum(sess_possible),
sess_auth_illness = sum(sess_auth_illness)
) %>%
mutate(
oar = (sess_overall / sess_possible) * 100,
iar = (sess_auth_illness / sess_possible) * 100
) %>%
tidyr::gather(key, value, oar:iar)
illness_summary
## Source: local data frame [18 x 6]
##
## Year sess_overall sess_possible sess_auth_illness key value
## <fctr> <int> <int> <int> <chr> <dbl>
## 1 2006/07 101688627 1579151686 56318795 oar 6.439446
## 2 2007/08 92716911 1480357958 51614916 oar 6.263141
## 3 2008/09 99518296 1576211246 58638736 oar 6.313766
## 4 2009/10 91532020 1515697308 55355370 oar 6.038938
## 5 2010/11 92722678 1603871560 56428397 oar 5.781179
## 6 2011/12 76087568 1524001108 46140038 oar 4.992619
## 7 2012/13 79741964 1509825224 50356903 oar 5.281536
## 8 2013/14 71314855 1621608727 43602079 oar 4.397784
## 9 2014/15 72146803 1589076637 46573697 oar 4.540171
## 10 2006/07 101688627 1579151686 56318795 iar 3.566396
## 11 2007/08 92716911 1480357958 51614916 iar 3.486651
## 12 2008/09 99518296 1576211246 58638736 iar 3.720233
## 13 2009/10 91532020 1515697308 55355370 iar 3.652139
## 14 2010/11 92722678 1603871560 56428397 iar 3.518262
## 15 2011/12 76087568 1524001108 46140038 iar 3.027559
## 16 2012/13 79741964 1509825224 50356903 iar 3.335280
## 17 2013/14 71314855 1621608727 43602079 iar 2.688816
## 18 2014/15 72146803 1589076637 46573697 iar 2.930865
Now for the plotting.
Rather than approach it piece by piece, I include the full code here in a single chunk.
# Start with the new illness_summary object
illness_summary %>%
# Set up the basics of the plot
ggplot +
aes(
x = Year,
y = value,
group = key,
colour = key
) +
# Add the lines
geom_path(size = 1.5) +
# Add the values at the start and end of the lines
geom_text(
data = illness_summary %>% filter(Year %in% c("2006/07","2014/15")) %>% arrange(Year),
# Force values to show one decimal place even if that is zero
aes(label = sprintf("%.1f", value)),
# Nudge the values away from the lines
hjust = rep(c(1.25,-0.25),each = 2),
fontface = "bold"
) +
# Label the lines
geom_text(
data = illness_summary %>% filter(Year == "2006/07"),
aes(label = c(
"Overall absence rate",
"Illness absence rate"
)),
# Left justify, and nudge the values up away from the lines
hjust = 0,
vjust = -1.2,
size = 4,
fontface = "bold"
) +
# axis limits
expand_limits(x = 0, y = c(0, 8)) +
# Use the gov.uk colours
scale_colour_manual(values = gov_cols[c("turquoise","brown")] %>% unname) +
# Apply theme_gov
theme_gov(
base_size = 12, base_colour = "gray40", axes = "x"
) +
# Label the axes
xlab("Autumn and spring term") +
ylab("Absence rate (%)") +
# Add a title. Note that line breaks in the title must be specified manually
# with "\n"
ggtitle(
"Comparison of the trend in overall and illness\n absence rates: England, autumn 2006 and\n spring 2007 to autumn 2014 and spring 2015"
) +
# Make the y-axis title horizontal, and at the top of the axis.
# Adjust margins to compensate for this.
# Adjust the axis breakpoints.
theme(
axis.title.y = element_text(
angle = 0, hjust = 20, vjust = 1.01
),
plot.margin = grid::unit(c(0,5,5,0), "mm")
) +
scale_y_continuous(breaks = c(0, seq(0, 8, 2)))
ivyleavedtoadflax/govstyle documentation built on May 18, 2019, 7:14 a.m.
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title: "Absence and Exclusion Statistics" author: Matthew Upson date: "2016-07-26" output: rmarkdown::html_vignette vignette: > %\VignetteIndexEntry{"Absence and Exclusion Statistics"} %\VignetteEngine{knitr::rmarkdown} \usepackage[utf8]{inputenc}
The govstyle package is designed to give your ggplot2 figures gov.uk friendly formatting. At present the package consists of a single theme which can be applied to ggplots. More functionality will be added in the future.
A real life example
In this vignette, we will reproduce two of the plots presented in the 2015 Statistical First Release (SFR) 39 from the Department for Education. This SFR deals with statistics relating to student absence and exclusion, and is available for download here.
Getting the data
The first step is to download and prepare the data. The SFR data are stored as a large (41.7 MB) CSV file within a zip file, which is available here.
Downloading and extracting the data can all be done in R
It's worth doing a quick check to ensure that this worked:
file.exists("SFR39_2015_Autumn_Spring_Proposed_SFR_structure.csv")
## [1] TRUE
## Should be 43776735 bytes:
file.info("SFR39_2015_Autumn_Spring_Proposed_SFR_structure.csv")$size
## [1] 43776735
We also need to install the govstyle package.
This vignette uses version v0.1.0 - leaving out this argument from devtools::install_github will fetch the latest commit on the master branch
devtools::install_github(
repo = "ivyleavedtoadflax/govstyle"
)
library(govstyle)
Loading and cleaning the data
If all has gone well, we can load the data and make some basic maniuplations.
For this we need both readr and dplyr:
library(readr)
library(dplyr)
Here I use the dplyr framework using the pipe %>% to combine a lot of cleaning tasks into a single block of code.
First I load the data from CSV using readr::read_csv(), then use dplyr::select() and dplyr::mutate() to subset the columns I am interested in, and convert character columns to
absence_data_full <- read_csv(
file = "SFR39_2015_Autumn_Spring_Proposed_SFR_structure.csv",
na = c( "x", ".", "")
) %>%
mutate(
Period = factor(Period),
Level = factor(Level),
Year = factor(Year),
Country = factor(Country),
School_type = School_type %>% tolower %>% factor
)
# For brevity of printing, select only columns of interest.
absence_data <- absence_data_full %>%
select(
Period, Level, Year, Country,
School_type, sess_possible, sess_overall
)
From a quick scan of the data, we can see that all the remaining character columns have been converted to factor, and we have two remaining numeric columns which are integer.
absence_data
## Source: local data frame [185,543 x 7]
##
## Period Level Year Country School_type
## (fctr) (fctr) (fctr) (fctr) (fctr)
## 1 Autumn and spring NATIONAL 2014/15 England state-funded primary
## 2 Autumn and spring NATIONAL 2014/15 England state-funded secondary
## 3 Autumn and spring REGION 2014/15 England state-funded primary
## 4 Autumn and spring REGION 2014/15 England state-funded secondary
## 5 Autumn and spring REGION 2014/15 England state-funded primary
## 6 Autumn and spring REGION 2014/15 England state-funded secondary
## 7 Autumn and spring REGION 2014/15 England state-funded primary
## 8 Autumn and spring REGION 2014/15 England state-funded secondary
## 9 Autumn and spring REGION 2014/15 England state-funded primary
## 10 Autumn and spring REGION 2014/15 England state-funded secondary
## .. ... ... ... ... ...
## Variables not shown: sess_possible (int), sess_overall (int)
Calculating Overall Absence Rate
To recreate the plots in the SFR, we first need to calculate the national overall absence rate (OAR), which is given as:
the total number of overall absence sessions for all pupils as a percentage of the total number of possible sessions for all pupils, where overall absence is the sum of authorised and unauthorised absence and one session is equal to half a day.
or:
$$ \text{Overall absence rate} = \frac{\text{Total Overall absence sessions}}{\text{Total sessions possible}}\times 100 $$
For this we need to subset the data and calculate this at the national level, and combine this calculation with the regional data
# Calculate the national OAR values.
oar_summary <- absence_data %>%
dplyr::filter(
Level == "NATIONAL"
) %>%
mutate(
oar = (sess_overall/sess_possible) * 100
)
# Calculate the OAR values for Period, Level, Year, and Country combinations
oar_summary_combined <- absence_data %>%
dplyr::filter(
Level == "NATIONAL"
) %>%
group_by(Period, Level, Year, Country) %>%
summarise(
sess_possible = sum(sess_possible),
sess_overall = sum(sess_overall)
) %>%
mutate(
oar = (sess_overall/sess_possible) * 100,
School_type = "state-funded primary and secondary"
)
# Combine the two above dataframes
oar_summary <- bind_rows(
oar_summary,
oar_summary_combined
)
Note that combining the two dataframes above leads to School_type being coerced to character.
This is not an issue for use here.
oar_summary
## Source: local data frame [27 x 8]
##
## Period Level Year Country School_type
## (fctr) (fctr) (fctr) (fctr) (chr)
## 1 Autumn and spring NATIONAL 2014/15 England state-funded primary
## 2 Autumn and spring NATIONAL 2014/15 England state-funded secondary
## 3 Autumn and spring NATIONAL 2013/14 England state-funded primary
## 4 Autumn and spring NATIONAL 2013/14 England state-funded secondary
## 5 Autumn and spring NATIONAL 2012/13 England state-funded primary
## 6 Autumn and spring NATIONAL 2012/13 England state-funded secondary
## 7 Autumn and spring NATIONAL 2011/12 England state-funded primary
## 8 Autumn and spring NATIONAL 2011/12 England state-funded secondary
## 9 Autumn and spring NATIONAL 2010/11 England state-funded primary
## 10 Autumn and spring NATIONAL 2010/11 England state-funded secondary
## .. ... ... ... ... ...
## Variables not shown: sess_possible (int), sess_overall (int), oar (dbl)
Creating the first plot
For the first plot, we also need the values from the start and end of the timeseries for inclusion in the plot.
oar_values <- oar_summary %>%
filter(
Year %in% c("2006/07","2014/15")
) %>%
arrange(Year)
oar_values
## Source: local data frame [6 x 8]
##
## Period Level Year Country
## (fctr) (fctr) (fctr) (fctr)
## 1 Autumn and spring NATIONAL 2006/07 England
## 2 Autumn and spring NATIONAL 2006/07 England
## 3 Autumn and spring NATIONAL 2006/07 England
## 4 Autumn and spring NATIONAL 2014/15 England
## 5 Autumn and spring NATIONAL 2014/15 England
## 6 Autumn and spring NATIONAL 2014/15 England
## Variables not shown: School_type (chr), sess_possible (int), sess_overall
## (int), oar (dbl)
To produce a nice plot ends up in quite a lot of code, so I will build up bit by bit.
library(ggplot2)
p <- oar_summary %>%
ggplot +
aes(
x = Year,
y = oar,
colour = School_type,
fill = School_type,
group = School_type
) +
geom_path(size = 1.5) +
xlab("Autumn and Spring term") +
ylab("Overall absence rate (%)")
This gives us our base plot
p
Government tends to like seeing zero on the y-axis, so lets fix the axes with expand_limits(), and add a title with ggtitle.
p1 <- p +
expand_limits(
x = 0,
y = c(0, 8.5)
) +
ggtitle(
"Overall absence rate across state-funded\nprimary and secondary schools"
)
p1
At this point I apply theme_gov(), and introduce a scale using colours from the gov.uk colour palette.
For this we can call check_pal()
check_pal()
p2 <- p1 +
theme_gov(
base_size = 12,
base_colour = "gray40") +
scale_colour_manual(
values = gov_cols[c("turquoise","brown","light_blue")] %>% unname
)
p2
theme_gov() removes the legend by default, so I'll label the lines instead.
This gets a little complicated here as we need to nudge the values into the correct place using the hjust and vjust arguments.
I also use the sprintf() command to force R to print a single decimal place, even if this number is zero - the default would be not to do this.
p3 <- p2 +
geom_text(
data = oar_values,
aes(
label = sprintf("%.1f", oar)
),
hjust = rep(c(1.35,-0.35), each = 3),
fontface = "bold"
)+
geom_text(
data = oar_summary %>% filter(Year == "2006/07"),
aes(
label = c(
"Primary",
"Secondary",
"Primary and secondary"
)
),
hjust = 0,
vjust = -1,
fontface = "bold"
)
p3
So this is pretty close to the final figure. One thing we might want to do is rotate the y-axis label so that it reads horizontally
p4 <- p3 +
theme(
# plot.margin = grid::unit(
# c(0, 5, 5, 0), "mm"),
axis.title.y = element_text(
angle = 0
)
)
p4
Creating the second plot
Illness absence rates
Start with the full absence data. Filter to only NATIONAL values, then sum over years for the variables sess_overall, sess_possible, and sess_auth_illness. Then calculate the overall absence rate, and the illness absence rate, and finally gather this up into a long rather than a wide data.frame to allow easier plotting of colours
illness_summary <- absence_data_full %>%
dplyr::filter(Level == "NATIONAL") %>%
group_by(Year) %>%
summarise(
sess_overall = sum(sess_overall),
sess_possible = sum(sess_possible),
sess_auth_illness = sum(sess_auth_illness)
) %>%
mutate(
oar = (sess_overall / sess_possible) * 100,
iar = (sess_auth_illness / sess_possible) * 100
) %>%
tidyr::gather(key, value, oar:iar)
illness_summary
## Source: local data frame [18 x 6]
##
## Year sess_overall sess_possible sess_auth_illness key value
## <fctr> <int> <int> <int> <chr> <dbl>
## 1 2006/07 101688627 1579151686 56318795 oar 6.439446
## 2 2007/08 92716911 1480357958 51614916 oar 6.263141
## 3 2008/09 99518296 1576211246 58638736 oar 6.313766
## 4 2009/10 91532020 1515697308 55355370 oar 6.038938
## 5 2010/11 92722678 1603871560 56428397 oar 5.781179
## 6 2011/12 76087568 1524001108 46140038 oar 4.992619
## 7 2012/13 79741964 1509825224 50356903 oar 5.281536
## 8 2013/14 71314855 1621608727 43602079 oar 4.397784
## 9 2014/15 72146803 1589076637 46573697 oar 4.540171
## 10 2006/07 101688627 1579151686 56318795 iar 3.566396
## 11 2007/08 92716911 1480357958 51614916 iar 3.486651
## 12 2008/09 99518296 1576211246 58638736 iar 3.720233
## 13 2009/10 91532020 1515697308 55355370 iar 3.652139
## 14 2010/11 92722678 1603871560 56428397 iar 3.518262
## 15 2011/12 76087568 1524001108 46140038 iar 3.027559
## 16 2012/13 79741964 1509825224 50356903 iar 3.335280
## 17 2013/14 71314855 1621608727 43602079 iar 2.688816
## 18 2014/15 72146803 1589076637 46573697 iar 2.930865
Now for the plotting. Rather than approach it piece by piece, I include the full code here in a single chunk.
# Start with the new illness_summary object
illness_summary %>%
# Set up the basics of the plot
ggplot +
aes(
x = Year,
y = value,
group = key,
colour = key
) +
# Add the lines
geom_path(size = 1.5) +
# Add the values at the start and end of the lines
geom_text(
data = illness_summary %>% filter(Year %in% c("2006/07","2014/15")) %>% arrange(Year),
# Force values to show one decimal place even if that is zero
aes(label = sprintf("%.1f", value)),
# Nudge the values away from the lines
hjust = rep(c(1.25,-0.25),each = 2),
fontface = "bold"
) +
# Label the lines
geom_text(
data = illness_summary %>% filter(Year == "2006/07"),
aes(label = c(
"Overall absence rate",
"Illness absence rate"
)),
# Left justify, and nudge the values up away from the lines
hjust = 0,
vjust = -1.2,
size = 4,
fontface = "bold"
) +
# axis limits
expand_limits(x = 0, y = c(0, 8)) +
# Use the gov.uk colours
scale_colour_manual(values = gov_cols[c("turquoise","brown")] %>% unname) +
# Apply theme_gov
theme_gov(
base_size = 12, base_colour = "gray40", axes = "x"
) +
# Label the axes
xlab("Autumn and spring term") +
ylab("Absence rate (%)") +
# Add a title. Note that line breaks in the title must be specified manually
# with "\n"
ggtitle(
"Comparison of the trend in overall and illness\n absence rates: England, autumn 2006 and\n spring 2007 to autumn 2014 and spring 2015"
) +
# Make the y-axis title horizontal, and at the top of the axis.
# Adjust margins to compensate for this.
# Adjust the axis breakpoints.
theme(
axis.title.y = element_text(
angle = 0, hjust = 20, vjust = 1.01
),
plot.margin = grid::unit(c(0,5,5,0), "mm")
) +
scale_y_continuous(breaks = c(0, seq(0, 8, 2)))
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