Adding headers/ identifiers to List of lists in R

Question

[Erika Gedvilaite]

Hello all,

This is probably a beginner question, but I have been scavaging the internet and cannot find the answer. I want to add a header or an identifier to my list of lists.

I am inporting a csv file that has multiple data points for multiple individuals:

         V1     V2     V3
Tary    23     24       14
Lane    10   15        30
Don      15    30    34

FILE_LIST <- list()
listcsv <- dir(path = "Area_C5_Optimized/", pattern = "*Area_Analysis.csv",full.names = TRUE, recursive = TRUE,no.. = T)
for (x in 1:length(listcsv)){
  FILE_LIST[[x]] <- read.table(file = listcsv[x], header = T, sep = ",", skipNul = T, fill = T)
  colnames(FILE_LIST[[x]]) <- c("V1","V2","V3","V4","V5","V6","V7","V8","V9","V10","V11","V12")
}

I am first summing the totals and the sums

TOTAL_SUMS <- list()
AREA_SUMS <-list()
for (i in 1:length(FILE_LIST)){
  TOTAL_SUMS[[i]] <- list(rowSums(x = FILE_LIST[[i]][, 2:12], na.rm = TRUE))
  AREA_SUMS[[i]] <- list(rowSums(x = FILE_LIST[[i]][, 3:12], na.rm = TRUE))
}

And now I want to create a boxplot for each area, all v3 values by doing this:

V3_females <- list()
par(mfrow=c(1,1))
for (r in 1:length(FILE_LIST)){
  if (length(grep(x = FILE_LIST[[r]][1,1], pattern = "*_females")) > 0){
    V3_females[[r]] <- FILE_LIST[[r]][,3]
  }
  else
    next
}
V3_females <- V3_females[ ! sapply(V3_females, is.null) ]
boxplot(x = V3_females, na.rm = TRUE, main = "C5 Wings Areas by Segment(female) - V3", xlab = "Wing Mutation", ylab = "Area Distribution")

Now for each graph produce I want all of the bottom/column labels to be labeled "Tary, Lane, Don".

How do you do that?

Thank you in advance for all of the advice and help.

Erika

[WouterDeCoster]

type ?boxplot in the R terminal to get usage info, help with arguments and examples :-)

Answer 1

[informatics bot]

Did you try:

boxplot(x = V3_females, na.rm = TRUE, main = "C5 Wings Areas by Segment(female) - V3", xlab = "Wing Mutation", ylab = "Area Distribution", names=c("Tary", "Lane", "Don"))