[R] get() return nothing

Fix Ace acefix at rocketmail.com
Mon Feb 13 17:50:28 CET 2017

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?

    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

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