Use list values in for loop

Question

I have a table4 with 25 columns and I do want to subset this table for 7 values in column Job..R to get 7 individual tables.

for(i in 1:7) {
  x = NULL
  x = list(1 == "14047/2", 2 == "18331/3", 3 == "18331/4", 4 == "24889/3", 
           5 == "24889/4", 6 == "24889/5", 7 == "24889/9")
  View(i)
  a = subset(table4, Job..R == x[i])
  b = mean(a[ ,13])
  View(a)
  View(b)
  save(b, file="i.Rda") #ideally save .Rda file with used Job..R
}

I created a for loop from 1 to 7 and a list with names 1 to 7 and to each name I have assigned a value from column Job..R I want to subset to.

At the moment this loop does 7 loops (that is what I want) and creates me 7 tables with the 25 columns including headers but without content. How can I get the content into the new tables? And how can I save the new tables with a specific file name for each table. Ideally the specific file name is the number from column Job..R I used to subset with. Many thanks in advance!!

Johannes

hello, and welcome to stackoverflow. Please consider rewording your question as it lacks clarity. — Ricardo Saporta
– Ricardo Saporta, Commented Aug 4, 2014 at 3:18

thelatemail · Accepted Answer · 2014-08-04 04:55:19Z

1

Don't use == inside your list() call as it compares values rather than assigning list items. x using your current code is just a list of FALSE values because:

1=="14047/2"
#[1] FALSE

Try this instead:

x = list("14047/2","18331/3","18331/4","24889/3", "24889/4","24889/5","24889/9")

Also, you will need to paste0 together your file name so that the i can be interpreted properly:

save(b, file=paste0(i,".Rda") )

edited Aug 4, 2014 at 4:55

answered Aug 4, 2014 at 3:54

thelatemail

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4 Comments

Johannes Over a year ago

Thank you, the sub setting works now, but when I do the save command then the console comes up with the following: 115: save(a, paste0(i,".Rda") #ideally save .Rda file with used Job..R 116: } ^ It complaints about the closing bracket, @thelatemail

thelatemail Over a year ago

@Johannes - did you add a second closing bracket just like the example code I posted? It doesn't look like your code has one.

Johannes Over a year ago

I found this as well and tried to delete my comment, but now the following error message appears: Error in save(a, paste0(i, ".Rda")) : object ‘paste0(i, ".Rda")’ not found.

waternova Over a year ago

@thelatemail that last line should be save(b, file=paste0(i,".Rda") )

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