get() return nothing
Well, I am not trying to print anything. I just would like to get the dimension information for all the dataframes I created. Could you please help me to develop the script? Thanks. Ace
On Saturday, February 11, 2017 7:53 PM, Duncan Murdoch <murdoch.duncan at gmail.com> wrote:
On 11/02/2017 1:33 PM, Fix Ace via R-help wrote:
Hello, there, I wrote a loop to check the dimension of all the .txt dataframes:> ls() ? [1] "actualpca.table" "b4galnt2"? ? ? ? "b4galnt2.txt"? ? "data" ? [5] "galnt4"? ? ? ? ? "galnt4.txt"? ? ? "galnt5"? ? ? ? ? "galnt5.txt" ? [9] "galnt6"? ? ? ? ? "galnt6.txt"? ? ? "glyco"? ? ? ? ? "glyco.txt" [13] "i"? ? ? ? ? ? ? "mtscaled"? ? ? ? "newsig.table"? ? "nicepca" [17] "pca"? ? ? ? ? ? "sig.txt"? ? ? ? "st3gal3"? ? ? ? "st3gal3.txt" [21] "st3gal5"? ? ? ? "st3gal5.txt"? ? "st6gal1"? ? ? ? "st6gal1.txt"
for(i in ls(pattern="txt")){dim(get(i))}
If I check individual ones, they are ok:
dim(get("galnt4.txt"))
[1] 8 3
could anyone help me to figure out why it did not work with a loop? Thanks a lot!
It's the difference between for (i in 1:10) i (which prints nothing) and for (i in 1:10) print(i) Duncan Murdoch