I would like to do two things in my code below. The first is that if I insert a wrong file in the fileInput, for example with columns with other names or file in the wrong format, like pdf, it will show a short message saying "The file you uploaded is not correct". The second is this: if you insert any excel file into fileInput, a calendar will be loaded. If I press reset buttom, the calendar is not deleted, so when I press reset, I would like only fileInput to be left.
library(shiny)
library(shinythemes)
library(dplyr)
library(tidyverse)
library(lubridate)
library(stringr)
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","2021-07-04"),
Category = c("ABC","ABC","ABC"),
Week= c("Wednesday","Wednesday","Wednesday"),
DR1 = c(4,1,0),
DR01 = c(4,1,0), DR02= c(4,2,0),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")}
else if(any(table(datas$Numbers) >= 3) & length(unique(datas$Numbers)) == 1){
yz <- unique(datas$Numbers)
lines(c(0,datas$Days), c(yz, datas$Numbers), lwd = 2)
points(0, yz, col = "red", pch = 19, cex = 2, xpd = TRUE)
text(.1,yz .5,round(yz,1), cex=1.1,pos=4,offset =1,col="black")}
else{
mod <- nls(Numbers ~ b1*Days^2 b2,start = list(b1 = 0,b2 = 0),data = datas, algorithm = "port")
new.data <- data.frame(Days = with(datas, seq(min(Days),max(Days),len = 45)))
new.data <- rbind(0, new.data)
lines(new.data$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")
}
}
ui <- fluidPage(
ui <- shiny::navbarPage(theme = shinytheme("flatly"), collapsible = TRUE,
br(),
tabPanel("",
sidebarLayout(
sidebarPanel(
br(),
uiOutput('fileInput'),
br(),
uiOutput("date"),
uiOutput("mycode"),
actionButton("reset", "Reset"),
br(),
),
mainPanel(
tabsetPanel(
tabPanel("", plotOutput("graph",width = "100%", height = "600")
)
),
))
)))
server <- function(input, output,session) {
data <- reactive(function.test())
data <- eventReactive(input$file, {
if (is.null(input$file)) {
return(NULL)
}
else {
df3 <- read_excel(input$file$datapath)
return(df3)
}
})
output$fileInput <- renderUI({
fileInput("file",h4(("Import file"), multiple = T,accept = ".xlsx"))
})
output$date <- renderUI({
req(data())
all_dates <- seq(as.Date('2021-01-01'), as.Date('2021-01-15'), by = "day")
disabled <- as.Date(setdiff(all_dates, as.Date(data()$date2)), origin = "1970-01-01")
dateInput(input = "date2",
label = h4("Data"),
min = min(data()$date2),
value = min(data()$date2),
format = "dd-mm-yyyy",
datesdisabled = disabled)
})
output$mycode <- renderUI({
req(input$date2)
df1 <- data()
df2 <- df1[as.Date(df1$date2) %in% input$date2,]
selectInput("code", label = h4("Category"),choices=unique(df2$Category))
})
output$graph <- renderPlot({
req(input$date2,input$code)
f1(data(),as.character(input$date2),as.character(input$code))
})
observeEvent(input$reset, {
df1 <- data()
updateDateInput(session, 'database', value = NA)
output$fileInput <- renderUI({
fileInput("file",h4(("Import file"), multiple = T,accept = ".xlsx"))
})
})
}
shinyApp(ui = ui, server = server)
CodePudding user response：
You may use validate to check if extension of uploaded file is "xlsx" and shinyjs::hide to hide the inputs.
library(shiny)
library(shinythemes)
library(dplyr)
library(tidyverse)
library(lubridate)
library(stringr)
library(shinyjs)
ui <- fluidPage(
useShinyjs(),
ui <- shiny::navbarPage(theme = shinytheme("flatly"), collapsible = TRUE,
br(),
tabPanel("",
sidebarLayout(
sidebarPanel(
br(),
uiOutput('fileInput'),
br(),
uiOutput("date"),
uiOutput("mycode"),
actionButton("reset", "Reset"),
br(),
),
mainPanel(
tabsetPanel(
tabPanel("", plotOutput("graph",width = "100%", height = "600")
)
),
))
)))
server <- function(input, output,session) {
data <- reactive(function.test())
data <- eventReactive(input$file, {
if (is.null(input$file)) {
return(NULL)
}
else {
ext <- tools::file_ext(input$file$datapath)
validate(need(ext == "xlsx", "Please upload a xlsx file"))
if(ext == "xlsx") {
df3 <- read_excel(input$file$datapath)
return(df3)
}
}
})
output$fileInput <- renderUI({
fileInput("file",h4(("Import file"), multiple = T,accept = ".xlsx"))
})
output$date <- renderUI({
req(data())
all_dates <- seq(as.Date('2021-01-01'), as.Date('2021-01-15'), by = "day")
disabled <- as.Date(setdiff(all_dates, as.Date(data()$date2)), origin = "1970-01-01")
dateInput(input = "date2",
label = h4("Data"),
min = min(data()$date2),
value = min(data()$date2),
format = "dd-mm-yyyy",
datesdisabled = disabled)
})
output$mycode <- renderUI({
req(input$date2)
df1 <- data()
df2 <- df1[as.Date(df1$date2) %in% input$date2,]
selectInput("code", label = h4("Category"),choices=unique(df2$Category))
})
output$graph <- renderPlot({
req(input$date2,input$code)
f1(data(),as.character(input$date2),as.character(input$code))
})
observeEvent(input$reset, {
df1 <- data()
updateDateInput(session, 'database', value = NA)
output$fileInput <- renderUI({
fileInput("file",h4(("Import file"), multiple = T,accept = ".xlsx"))
})
hide('date')
hide('code')
})
}
shinyApp(ui = ui, server = server)