你能幫我調整Download下面代碼的按鈕嗎？您會注意到，我正在生成一個表datatable。我想下載這個生成的表，但是當我按下下載時，我看到控制臺給出了以下錯誤：
Warning: Error in writexl::write_xlsx: Argument x must be a data frame or list of data frames[No stack trace available]
如何在我的代碼中調整它？
可執行代碼如下：
library(shiny)
library(shinythemes)
library(dplyr)
library(tidyverse)
library(lubridate)
library(DT)
library(writexl)
function.test<-function(){
df1 <- structure(
list(date1= c("2021-06-28","2021-06-28","2021-06-28"),
date2 = c("2021-07-01","2021-07-02","2021-07-03"),
Category = c("ABC","ABC","ABC"),
Week= c("Wednesday","Wednesday","Wednesday"),
DR1 = c(4,1,0),
DR01 = c(4,1,4), DR02= c(4,2,3),DR03= c(9,5,0),
DR04 = c(5,4,0),DR05 = c(5,4,0),DR06 = c(5,4,0),DR07 = c(5,4,0),DR08 = c(5,4,0)),
class = "data.frame", row.names = c(NA, -3L))
return(df1)
}
f1 <- function(df1, dmda, CategoryChosse) {
x<-df1 %>% select(starts_with("DR0"))
x<-cbind(df1, setNames(df1$DR1 - x, paste0(names(x), "_PV")))
PV<-select(x, date2,Week, Category, DR1, ends_with("PV"))
med<-PV %>%
group_by(Category,Week) %>%
summarize(across(ends_with("PV"), median))
SPV<-df1%>%
inner_join(med, by = c('Category', 'Week')) %>%
mutate(across(matches("^DR0\\d $"), ~.x
get(paste0(cur_column(), '_PV')),
.names = '{col}_{col}_PV')) %>%
select(date1:Category, DR01_DR01_PV:last_col())
SPV<-data.frame(SPV)
mat1 <- df1 %>%
filter(date2 == dmda, Category == CategoryChosse) %>%
select(starts_with("DR0")) %>%
pivot_longer(cols = everything()) %>%
arrange(desc(row_number())) %>%
mutate(cs = cumsum(value)) %>%
filter(cs == 0) %>%
pull(name)
(dropnames <- paste0(mat1,"_",mat1, "_PV"))
SPV <- SPV %>%
filter(date2 == dmda, Category == CategoryChosse) %>%
select(-any_of(dropnames))
if(length(grep("DR0", names(SPV))) == 0) {
SPV[head(mat1,10)] <- NA_real_
}
datas <-SPV %>%
filter(date2 == ymd(dmda)) %>%
group_by(Category) %>%
summarize(across(starts_with("DR0"), sum)) %>%
pivot_longer(cols= -Category, names_pattern = "DR0(. )", values_to = "val") %>%
mutate(name = readr::parse_number(name))
colnames(datas)[-1]<-c("Days","Numbers")
datas <- datas %>%
group_by(Category) %>%
slice((as.Date(dmda) - min(as.Date(df1$date1) [
df1$Category == first(Category)])):max(Days) 1) %>%
ungroup
m<-df1 %>%
group_by(Category,Week) %>%
summarize(across(starts_with("DR1"), mean))
m<-subset(m, Week == df1$Week[match(ymd(dmda), ymd(df1$date2))] & Category == CategoryChosse)$DR1
maxrange <- range(min(0, datas$Numbers, na.rm = TRUE), na.rm = TRUE)
maxrange[2] <- maxrange[2] - (maxrange[2] %%10) 35
max<-max(0, datas$Days, na.rm = TRUE) 1
plot(Numbers ~ Days, xlim= c(0,max), ylim= c(0,maxrange[2]),
xaxs='i',data = datas,main = paste0(dmda, "-", CategoryChosse))
if (nrow(datas)<=2){
abline(h=m,lwd=2)
points(0, m, col = "red", pch = 19, cex = 2, xpd = TRUE)
text(.1,m .5, round(m,1), cex=1.1,pos=4,offset =1,col="black")
return(as.numeric(m))
}
else if(any(table(datas$Numbers) >= 3) & length(unique(datas$Numbers)) == 1){
yz <- unique(datas$Numbers)
lines(c(0,datas$Days), c(yz, datas$Numbers), lwd = 2)
points(0, yz, col = "red", pch = 19, cex = 2, xpd = TRUE)
text(.1,yz .5,round(yz,1), cex=1.1,pos=4,offset =1,col="black")
return(as.numeric(yz))
}
else{
mod <- nls(Numbers ~ b1*Days^2 b2,start = list(b1 = 0,b2 = 0),data = datas, algorithm = "port")
new.data <- data.frame(Days = with(datas, seq(min(Days),max(Days),len = 45)))
new.data <- rbind(0, new.data)
lines(new.data$Days,predict(mod,newdata = new.data),lwd=2)
coef<-coef(mod)[2]
points(0, coef, col="red",pch=19,cex = 2,xpd=TRUE)
text(.99,coef 1,max(0, round(coef,1)), cex=1.1,pos=4,offset =1,col="black")
return(as.numeric(coef(model)[2]))
}
}
ui <- fluidPage(
ui <- shiny::navbarPage(theme = shinytheme("flatly"), collapsible = TRUE,
br(),
tabPanel("PAGE 1",
fluidPage(
fluidRow(
column(4,
wellPanel(
uiOutput('daterange'),
downloadButton("dl", "Download"),
)),
column(8,
tabsetPanel(
tabPanel("Table", dataTableOutput('table')
))
))))))
server <- function(input, output,session) {
data <- reactive(function.test())
output$daterange <- renderUI({
tagList(dateRangeInput("daterange1", "Period you want to see:",
min = min(data()$date2),
max = max(data()$date2)),
tags$script(HTML('
setTimeout(function(){
$("#daterange1 input")[0].value = "No date selected";
$("#daterange1 input")[1].value = "No date selected";
}, 50);
')))
})
data_subset <- reactive({
req(input$daterange1)
req(input$daterange1[1] <= input$daterange1[2])
days <- seq(input$daterange1[1], input$daterange1[2], by = 'day')
df1 <- subset(data(), as.Date(date2) %in% days)
df2 <- df1 %>% select(date2,Category)
All <- cbind(df2, coef = apply(df2, 1, function(x) {f1(data(),x[1],x[2])}))
All<-tidyr::pivot_wider(All, names_from = Category, values_from = coef)
All<-All %>% mutate(date2 = format(ymd(date2), "%d/%m/%Y"))%>%
mutate(sum = rowSums(across(2:last_col()), na.rm = TRUE)) %>%
mutate(across(everything(), ~ replace_na(as.character(.), '-')))
All<-datatable(All, options = list(columnDefs = list(list(className = 'dt-center', targets = "_all")),
paging =TRUE,searching = FALSE, pageLength = 10,dom = 'tip',scrollx=T),rownames = FALSE) %>%
formatRound(c(2:3), digits=0)
All
})
output$table <- renderDataTable({
data_subset()
})
output$dl <- downloadHandler(
filename = function() { "data.xlsx"},
content = function(file) {
showModal(modalDialog("Wait", footer=NULL))
on.exit(removeModal())
writexl::write_xlsx(data_subset(), path = file)
}
)
}
shinyApp(ui = ui, server = server)
生成的表：
uj5u.com熱心網友回復：
做一個data_subset回傳資料幀/tibble的反應導體，并將這些datatable內容應用到renderDataTable：
data_subset <- reactive({
req(input$daterange1)
req(input$daterange1[1] <= input$daterange1[2])
days <- seq(input$daterange1[1], input$daterange1[2], by = 'day')
df1 <- subset(data(), as.Date(date2) %in% days)
df2 <- df1 %>% select(date2,Category)
All <- cbind(df2, coef = apply(df2, 1, function(x) {f1(data(),x[1],x[2])}))
All<-tidyr::pivot_wider(All, names_from = Category, values_from = coef)
All %>% mutate(date2 = format(ymd(date2), "%d/%m/%Y"))%>%
mutate(sum = rowSums(across(2:last_col()), na.rm = TRUE)) %>%
mutate(across(everything(), ~ replace_na(as.character(.), '-')))
})
output$table <- renderDataTable({
datatable(
data_subset(),
options = list(
columnDefs = list(
list(className = 'dt-center', targets = "_all")
),
paging = TRUE,
searching = FALSE,
pageLength = 10,
dom = 'tip',
scrollx=TRUE
),
rownames = FALSE
) %>%
formatRound(c(2:3), digits=0)
})
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