First, you should load recharts:

library(recharts)

1 Introduction

Funnel plot includes 2 basic types:

Funnel
Pyramid

The keys are:

character x and numeric y and will be compacted using data.table::dcast with fun=sum
x is used as series, series is used to produce stacked funnels, while facet is used to produce separate funnels!
Pie and funnel charts can shift from one to another by clicking type shift buttons in the toolbox widget.

2 Function Call

echartr(data, x, <y>, <series>, <facet>, <t>, <type>, <subtype>)

Arg	Requirement
data	source data in the form of data.frame
x	character independent variable. Each level of `x` is treated as a data series. Other type will be coerced to factors. Only the first one is accepted if multiple variables are provided.
y	numeric dependent variable. Only the first one is accepted if multiple variables are provided.
series	series variable which will be coerced to factors. Each level of `series` is treated as a subsetting factor to produce stacked funnels. Only the first one is accepted if multiple variables are provided.
facet	facetting variable which will be coerced to factors. Each level of `facet` is treated as a subsetting factor to produce separate funnels. Only the first one is accepted if multiple variables are provided.
t	timeline variable which will be coerced to factors. Only the first one is accepted if multiple variables are provided.
type	‘funnel’, ‘pyramid’.
subtype	funnel: c(“left”,“center”,“right”) left: funnelAlign left center: funnelAlign center (default) right: funnelAlign right pyramid: c(“left”,“center”,“right”) left: funnelAlign left center: funnelAlign center (default) right: funnelAlign right

3 Showcase

3.1 Data Preparation

Let’s look into mtcars dataset embeded in the package datasets. The distribution by carb and am is shown as below:

cars <- data.table::dcast(mtcars, carb+am~., length, value.var='gear')
names(cars) <- c("carb", "am", "N")
knitr::kable(cars)

carb	am	N
1	0	3
1	1	4
2	0	6
2	1	4
3	0	3
4	0	7
4	1	3
6	1	1
8	1	1

3.2 Funnel Chart

3.2.1 Single Funnel

type is set ‘funnel’.

echartr(cars, carb, N, type='funnel') %>% 
    setTitle('mtcars: carb distibution')

3.2.2 Stacked Funnel

Set series to produce a stacked funnel chart.

echartr(cars, carb, N, am, type='funnel') %>% 
    setTitle('mtcars: carb distibution by am')

3.2.3 Multiple Funnel

Funnel chart uses facet as subsetting factor to produce seperate polar systems. So when we apply am (containing 2 levels) as facet, we get 2 funnels.

echartr(cars, carb, N, facet=am, type='funnel') %>% 
    setTitle('mtcars: carb distibution by am')

3.2.4 With Timeline

We need another variable as timeline. Let’s say, ‘gear’.

cars_gear <- data.table::dcast(mtcars, carb+gear+am~., length, value.var='gear')
names(cars_gear) <- c("carb", "gear", "am", "N")

In order to make timeline work properly, we need an expand.grid dataset to cover all the combination of x and t levels.

fullData <- with(mtcars, data.frame(
    expand.grid(unique(carb), unique(gear), unique(am))))
names(fullData) <- c("carb", "gear", "am")
cars_gear <- merge(cars_gear, fullData, all.y=TRUE)

echartr(cars_gear, carb, N, facet=am, t=gear, type='funnel') %>% 
    setTitle('mtcars: carb distibution by am across gear')

3.2.5 Different Alignment

Left align.

echartr(cars, carb, N, facet=am, type='funnel', subtype='left') %>% 
    setTitle('mtcars: carb distibution by am across gear')

3.3 Pyramid Chart

type is set ‘pyramid’.

echartr(cars, carb, N, facet=am, type='pyramid') %>% 
    setTitle('mtcars: carb distibution by am')

You can also mix funnel and pyramid. Note that you need to wrap type and subtype in list since they are thus associated with facets.

echartr(cars, carb, N, facet=am, type=list('funnel', 'pyramid')) %>% 
    setTitle('mtcars: carb distibution by am')

echartr(cars, carb, N, facet=am, type=list('funnel', 'pyramid'), 
        subtype=list('right', 'left')) %>% 
    setTitle('mtcars: carb distibution by am')

4 Futher Setup

Then you can configure the widgets, add markLines and/or markPoints, fortify the chart.

You can refer to related functions to play around on your own.

Basic Plots 22 - Funnel Chart