[英]Store edits of RHandsontable in a Shiny application
I have a Shiny application that produces reads in a .csv file and produces an editable table. 我有一个Shiny应用程序,该程序在.csv文件中产生读取并产生可编辑的表。
library(dplyr)
library(rhandsontable)
options(shiny.maxRequestSize = 9*1024^2)
function(input, output) {
values <- reactiveValues()
Post <- c("Bank", "Bank")
list2 <- c(12,13)
df <- data.frame(Post, list2)
Post <- c("Ba", "Ba")
list2 <- c(12,13)
df2 <- data.frame(Post, list2)
performTextMining <- reactive({
df$Post <- as.character(df$Post)
df <- df %>% filter(Post == "Bank")
return(df)
})
output$contents <- renderRHandsontable({
items <- c("Boodschappen", "Noodzakelijk")
inFile <- input$file1
if (is.null(inFile))
return(NULL)
df <- read.csv(inFile$datapath, header = input$header,
sep = input$sep, quote = input$quote)
#performTextMining()
rhandsontable(df, width = 550, height = 300) %>%
hot_col(col = "Post", type = "dropdown", source = items)
})
filterData <- function(){
setwd("C:/Users/Marc/Dropbox/PROJECTEN/Lopend/visualistation_training/shiny_examples")
write.csv(df, file = "MyData.csv")
}
saveData <- function(){
finalDF <- isolate(values[["df"]])
setwd("C:/Users/Marc/Dropbox/PROJECTEN/Lopend/visualistation_training/shiny_examples")
write.csv(finalDF, file = "MyData.csv")
}
observeEvent(input$saveBtn, saveData())
observeEvent(input$writeBtn, filterData())
}
What I would like to do however is use the save button to store edit made in the table and then write an .csv file. 但是,我要执行的操作是使用“保存”按钮来存储在表中所做的编辑,然后编写一个.csv文件。
I therefore created a save button: 因此,我创建了一个保存按钮:
observeEvent(input$writeBtn, filterData())
Which triggers the following function: 触发以下功能:
saveData <- function(){
finalDF <- isolate(values[["df"]])
setwd("C:/Users/Marc/Dropbox/PROJECTEN/Lopend/visualistation_training/shiny_examples")
write.csv(finalDF, file = "MyData.csv")
}
This however leaves me with an empty .csv file. 但是,这给我留下了一个空的.csv文件。 Any thoughts on what goes wrong here?
对这里出什么问题有任何想法吗?
To obtain data from edited rhandsontable
one needs to call hot_to_r()
function. 要从已编辑的
rhandsontable
获取数据,需要调用hot_to_r()
函数。 Applying this in above case, code should looks like following: 在上述情况下应用此代码,代码应如下所示:
saveData <- function(){
finalDF <- hot_to_r( input$contents )
write.csv(finalDF, file = "C:/Users/Marc/Dropbox/PROJECTEN/Lopend/visualistation_training/shiny_examples/MyData.csv")
}
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