Shiny Error: object 'data_survival_curve' not found - r

Question

I can not figure out what is wrong with the following code. After running runApp('script.R'), I am getting the following error Error: object 'data_survival_curve' not found. I run debug in RStudio and on line nr 60 this variable is created and it exists till the moment when error comes.
script.R file:
library(shiny)
library(survival)
library(survminer)
library(directlabels)
data <- read.csv('dataset.csv', header = TRUE, sep = ",", fileEncoding="UTF-8")
unique_transplant_years_decreasing <- as.numeric(sort(unique(c(data$transplant_year)), decreasing = TRUE))
krivkaPreziti <- sidebarLayout(
# all inputs for graph survival analysis (krivka preziti)
sidebarPanel(
sliderInput("krivka_preziti_input_years", 'Years:',
min = unique_transplant_years_decreasing[length(unique_transplant_years_decreasing)],
max = unique_transplant_years_decreasing[1],
value = c(unique_transplant_years_decreasing[length(unique_transplant_years_decreasing)],
unique_transplant_years_decreasing[1]),
step = 1),
numericInput('krivka_preziti_input_seskupit_po', 'Group by (years):',
value = 0,
min = 0),
checkboxInput('krivka_preziti_input_facet', 'Facet', value = FALSE),
width = 3
),
# Create a spot for bar plot
mainPanel(
h2('Survival curve'),
br(),
plotOutput('krivka_preziti', height = "750px"),
width = 12
)
)
panelAnalyzaPreziti <- tabPanel(
'Survival analysis',
krivkaPreziti
)
ui <- navbarPage(
title = "Application",
panelAnalyzaPreziti
)
server <- shinyServer(
function(input, output, session)
{
output$krivka_preziti <- renderPlot(
{
krivka_year_bottom <- input$krivka_preziti_input_years[1]
krivka_year_top <- input$krivka_preziti_input_years[2]
krivka_seskupit_po <- input$krivka_preziti_input_seskupit_po
# data which fit the range of selected years
# data which meet the condition that survival_time is not NA
data_survival_curve <- data[data$transplant_year %in% seq(krivka_year_bottom, krivka_year_top) &
!is.na(data$survival_time) &
data$survival_time >= 0,]
# if seskupit_po != 0, then cut
if(krivka_seskupit_po != 0) {
data_survival_curve$time_period <- cut(as.numeric(data_survival_curve$transplant_year),
seq(krivka_year_bottom, krivka_year_top, krivka_seskupit_po),
include.lowest = T)
data_survival_curve <- data_survival_curve[!is.na(data_survival_curve$time_period),]
data_survival_curve$time_period <- as.factor(data_survival_curve$time_period)
}
else {
data_survival_curve$time_period = data_survival_curve$transplant_year
}
# validate number of rows of data set > 0
shiny::validate(
need(nrow(data_survival_curve) > 0, 'Broader your input')
)
surv_obj <- Surv(data_survival_curve$survival_time/365,data_survival_curve$patient_died)
fit <- survfit(surv_obj ~ time_period, data = data_survival_curve)
krivka_preziti_plt <- ggsurvplot(fit,
linetype = c('solid'),
ggtheme = theme_bw(),
surv.scale = 'percent',
xlab = 'Years',
ylab = '%',
censor = FALSE,
break.x.by = 1,
break.y.by = 0.1)
plot2 <- krivka_preziti_plt + geom_dl(aes(label = time_period), method = list("last.points"), cex = 0.8)
plot2
}
)
}
)
shinyApp(
ui = ui,
server = server
)
Here is the data set that I am using: enter link description here

Answer 1

I've been struggling with the same issue since almost 1 hour and finally found the solution !
There have been a change in the "ggsurvplot" function and you now need to specify the dataset used in the "fit" element. So in your code you have to add :
krivka_preziti_plt <- ggsurvplot(fit, data = data_survival_curve,
linetype = c('solid'),
ggtheme = theme_bw(),
surv.scale = 'percent',
xlab = 'Years',
ylab = '%',
censor = FALSE,
break.x.by = 1,
break.y.by = 0.1)
Source : Github Issue, 13th of January 2018