How do you loop for n-columns and use conditionals?

I'm trying to make a loop for a table that will be generated in 'xtable'.

This is what I did "manually" together is here:

What I want to get

library(dplyr)
X1 = c(4.70e1, 4.72e1, 4.76e1, 2.73e20)
X2 = c(4.67e1, 4.69e1, 4.77e1, 2.05e20)
col.nam = c("AIC(n)", "HQ(n)", "SC(n)", "FPE(n)")
tab.out = data.frame(col.nam, X1, X2)

n.tab = tab.out %>%
  mutate(test1 = if_else(tab.out$X1 < tab.out$X2,
                         paste0(X1,"$^{*}$"),
                         paste0(X1)),
         test2 = if_else(tab.out$X2 < tab.out$X1,
                         paste0(X2,"\\textsuperscript{*}"),
                         paste0(X2)))%>%
  select(col.nam, test1, test2)

#  col.nam      test1                        test2
#1  AIC(n)         47     46.7\\textsuperscript{*}
#2   HQ(n)       47.2     46.9\\textsuperscript{*}
#3   SC(n) 47.6$^{*}$                         47.7
#4  FPE(n)   2.73e+20 2.05e+20\\textsuperscript{*}

I want to make a loop for n-columns using conditionals as seen below in the code (My current ugly and error-prone fix):

Lo que obtuve ?

tab.out = data.frame(X1, X2)
tab.out$max<-apply(tab.out, 1, max)
for(i in names(tab.out)){
  tab.out[[paste(i, 'test', sep="_")]] <- if_else(tab.out[[i]] < tab.out$max,
                                               paste0(i, "\\textsuperscript{*}"),
                                               paste0(i))
}

#        X1       X2      max                X1_test                X2_test max_test
#1 4.70e+01 4.67e+01 4.70e+01                     X1 X2\\textsuperscript{*}      max
#2 4.72e+01 4.69e+01 4.72e+01                     X1 X2\\textsuperscript{*}      max
#3 4.76e+01 4.77e+01 4.77e+01 X1\\textsuperscript{*}                     X2      max
#4 2.73e+20 2.05e+20 2.73e+20                     X1 X2\\textsuperscript{*}      max

Solution

I was able to solve it for n-columns and add the code output in latex.

X1 = c(4.70e1, 4.72e1, 4.76e1, 1.565)
X2 = c(4.67e1, 4.69e1, 4.77e1, 2.05e20)
X3 = c(1.67e1, 8.69e1, 2.77e1, 8.05e20)
tab.out = data.frame(X1, X2, X3)
tab.out$min<-apply(tab.out, 1, min)
for(i in names(tab.out)){
  tab.out[[paste(i, 'test', sep="")]] = if_else(tab.out[[i]] == tab.out$min,
                                                  paste0(tab.out[[i]], "\\textsuperscript{*}"),
                                                  paste0(tab.out[[i]]))
}

row.nam = c("AIC(n)", "HQ(n)", "SC(n)", "FPE(n)")
tab.out = data.frame(row.nam, tab.out)
tab.out = tab.out %>%
  select(row.nam, X1test, X2test, X3test)

#  row.nam                    X1test                   X2test                   X3test
#1  AIC(n)                        47                     46.7 16.7\\textsuperscript{*}
#2   HQ(n)                      47.2 46.9\\textsuperscript{*}                     86.9
#3   SC(n)                      47.6                     47.7 27.7\\textsuperscript{*}
#4  FPE(n) 1.565\\textsuperscript{*}                 2.05e+20                 8.05e+20

Output in latex:

colnames(tab.out) = c("Parameters", "Lag 1", "Lag 2", "Lag 3") #$m^r_t$
print(xtable::xtable(tab.out, 
                     header = F, 
                     caption = "asdasdasdasd",
                     label="table:tb1",
                     align="llccc"),
      hline.after = c(-1,0), 
      include.rownames=FALSE, 
      include.colnames = TRUE,
      add.to.row = list(pos = list(nrow(tab.out)),
                        command = paste("\\hline \n",
                                        "\\multicolumn{4}{l}{\\footnotesize{$^{*}$Indicates the selected order of lag}} \\\\",
                                        "\\multicolumn{4}{l}{\\footnotesize{\\textit{Elaboration: The authors}}}",
                                        sep = "")), comment=FALSE,
      sanitize.text.function = function(x){x})