Hi there,
I have a problem with assign(). Here is the demo code:
for (i in 1:10) {
# create a list with variable name as list_1, list_2, ..., etc.
assign(paste("list_", i, sep = ""), list())
# I hope to assign 5 to list_?[[1]], but I don't know how to code it.
# list_1[[1]] <- 5 # wo
On 2017/4/30 23:17, Jinsong Zhao wrote:
Hi there,
I have a problem with assign(). Here is the demo code:
for (i in 1:10) {
# create a list with variable name as list_1, list_2, ..., etc.
assign(paste("list_", i, sep = ""), list())
# I hope to assign 5 to list_?[[1]], but I don't know h
You did not give me any information about about your data using str() or
class() so I'll guess that you have a matrix, e.g.:
> class(moredata)
[1] "matrix"
> as.data.frame.table(moredata)
Var1 Var2 Freq
1xx0
2yx NA
3zx NA
4xy5
5yy0
6z
assign(paste("list_", i, "[[1]]", sep = ""), 5) creates a new variable with a
funny name.
You'd have to parse() and eval() to make that work, something like
eval(parse(text=paste("list_",i,"[[1]]<-",5, sep="")))
However,
---
> fortunes::fortune("parse")
If the answer is parse() you should
My reaction is... why do you think this is a good approach to pursue?
Avoid using assign!
library( fortunes )
fortune( 236 )
If you really need another level of containment, put your multiple lists into
another list:
lst <- lapply( 1:10, list )
lst[[1]][[1]] <- 5
--
Sent from my phone. Plea
Dear All,
This answer is very clear. Many thanks.
I am now confused about how str*ucture works. Where can I read more about
when does it return language / logical / chr ? I would want to read that
so I can interpret the result of structure. I don't think ?str contains
this.To me, logical and chr
Show us the code you used. Don't just tell us what you did. It is likely that
something you did after creating the matrix converted it to a data frame. Copy
and paste your code to your emails.
> str(mydf)
'data.frame': 3 obs. of 3 variables:
$ x: int 0 NA NA
$ y: int 5 0 NA
$ z: int 67
On 30/04/2017 12:26 PM, Ashim Kapoor wrote:
Dear All,
This answer is very clear. Many thanks.
I am now confused about how str*ucture works. Where can I read more about
when does it return language / logical / chr ? I would want to read that
so I can interpret the result of structure. I don't t
... and moreover, note that the assignment can even be shortened to:
> for ( i in 1:10 ) l[[c(i,1)]] <- 5
?"[[" contains details, but the relevant point is:
"[[ can be applied recursively to lists, so that if the single index i
is a vector of length p, alist[[i]] is equivalent to
alist[[i1]].
...
Some R tutorial recommendations can be found here:
https://www.rstudio.com/online-learning/#R
Hadley W.'s book might also be useful to you: http://adv-r.had.co.nz/
Cheers,
Bert
Bert Gunter
"The trouble with having an open mind is that people keep coming along
and sticking things into i
No. You are not using the correct command. Time to read the manual:
?write.table
You will find the answer to your question by looking at the alternate forms of
write.*().
David L. Carlson
Department of Anthropology
Texas A&M University
From: abo dalash [mailto:abo_d...@hotmail.com]
Sent: Su
On Sun, Apr 30, 2017 at 10:05 PM, Duncan Murdoch
wrote:
> On 30/04/2017 12:26 PM, Ashim Kapoor wrote:
>
>> Dear All,
>>
>> This answer is very clear. Many thanks.
>>
>> I am now confused about how str*ucture works. Where can I read more about
>> when does it return language / logical / chr ? I w
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