library(shiny)
library(dplyr)
library(plotly)
library(readxl)
library(DT)
we read and prepare the data in the same way as in a normal script
dataFromBO <-
read_xlsx(
path = “Book2.xlsx”,
sheet = “Sheet1”
)
result <-
dataFromBO %>% # filtering step
filter(
Basis == “Gross”, Maturity == “CUY”
) %>%
group_by(
Year,
Maturity,
Rein,
CoverType,
LOB,
Combined
) %>%
summarise(
Premium = sum(Premium),
Profit = sum(MEAN Result),
SA_TVAR_99 = -sum(SA_TVAR_99),
DIV_TVAR_99 = -sum(DIV_TVAR_99),
Div_B = 1-sum(DIV_TVAR_99)/sum(SA_TVAR_99)
)
EL <-
read_xlsx(
path = “Book3.xlsx”,
sheet = “EL”
)
user-interface is defined here
we basically say where each graphic should go
ui <- fluidPage(
fluidRow(
column(
width = 6,
plotlyOutput("bar_chart")
),
column(
width = 6,
plotlyOutput("bubble_chart")
)
),
fluidRow(
column(
width = 12,
dataTableOutput("table")
)
)
)
we define the graphics here
server <- function(input, output, session) {
this means that output with id “table” will produce a datatable with results
it’s included in the UI part through dataTableOutput(“table”)
output$table <- renderDataTable({
datatable(result)
})
output$bar_chart <- renderPlotly({
EL2 <-
EL %>%
group_by(Return) %>%
summarise(
Total = sum(TVaR)
)
EL3 <- inner_join(EL, EL2, by = "Return")
EL3 %>%
mutate(
Contribution = TVaR / Total
) %>%
plot_ly(
x= ~Return,
y = ~Contribution,
name = ~LOB_NAME
) %>%
add_bars() %>%
layout(
title = 'Line of Business Marginal Contribution by Return Period',
xaxis =
list(
title = "Return Period",
showgrid = FALSE,
categoryarray= sort(unique(EL3$Sort_Return)),
categoryorder = "array"
),
yaxis =
list(
title = "Marginal Contribution",
showgrid = FALSE
),
barmode= "stack"
)
})
output$bubble_chart <- renderPlotly({
plot_ly(
result,
x = ~DIV_TVAR_99,
y = ~Div_B,
text = ~Combined,
type = ‘scatter’,
mode = ‘markers’,
size = ~Premium,
color = ~Year,
colors = “Paired”,
marker =
list(
opacity = 0.5,
symbol= “circle”,
sizemode = ‘diameter’,
line = list(width = 2, color = “#FFFFFF”)
)
) %>%
layout(
title = ‘SCOR US: 2017 VS 2018 Risk Profile evolution’,
xaxis =
list(
title = 'x',
gridcolor = 'rgb(255, 255, 255)',
range = c(0, 900000000),
zerolinewidth = 1,
ticklen = 10,
gridwidth = 2
),
yaxis =
list(
title = 'Div_Benefit',
gridcolor = 'rgb(255, 255, 255)',
range = c(0, 1.2),
zerolinewidth = 1,
ticklen = 5,
gridwith = 2
),
showlegend = TRUE
)
})
}
start the app
shinyApp(ui, server)