r - Conditional formatting of a table based on values in a second dataframe -


assume example:

library(shiny) library(tidyverse)  df1 <- data.frame(a = 1:5, b = 6:10, c = 11:15) df2 <- data.frame(a = c(1:3,7,5), b = c(11, 7:10), c = 16:20)   server <- function(input, output) {   output$table1 <- rendertable({     df1   }, digits = 0   )   output$table2 <- rendertable({     df2   }, digits = 0   ) }  ui <- fluidpage(   div(h3("table formatting"), align = "center"),   div(tableoutput("table1"),align = "center"),    div(tableoutput("table2"), align = "center") )  shinyapp(ui = ui, server = server)

enter image description here

is possible format first table based on data of second table? let's want font of first table's values becomes green if value in second table @ same position same. red if values not equal.

for example df1[1,1] = df2[1,1] = 1, should green. df1[4,1] = 4 not same df2[4,1] = 7, font in df1[4,1] should red.

i don't care if formatting based on data.table, formattable or different, long usable in shiny.

thanks in advance!

you can find full answer in own post. see below.

here code you:

library("shiny") library("formattable")  df1 <- data.frame(a = 1:5, b = 6:10, c = 11:15) df2 <- data.frame(a = c(1:3,7,5), b = c(11, 7:10), c = 16:20)   ident <- function(...){   args <- c(...)    if( length( args ) > 2l ){     #  recursively call ident()     out <- c( identical( args[1] , args[2] ) , ident(args[-1]))   }else{     out <- identical( args[1] , args[2] )   }       return( all( out ) ) }  ui <- fluidpage(   div(h3("table formatting"), align = "center"),   div(formattableoutput("table1"),align = "center"),    div(formattableoutput("table2"), align = "center") )  server <- function(input, output) {   output$table2 <- renderformattable({formattable(df2, list(a = formatter("span", style = x ~ style(color= ifelse(x == df1$a & x == 1,"green", ifelse(!x == df1$a, "red", na))))))})    output$table1 <- renderformattable({formattable(df1)}) } shinyapp(ui = ui, server = server)

i have used purpose formattable package. have used format df2 , same thing should use df1 in server. hope keep going. wanted: when df1$a == df2$a , = 1 green, if !df1$a == df2$a red.


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