[R] Requesting for help on the problem of "subscript out of bounds"

[Jim Lemon]

The idea of using:

cat("i =",i,"\n")

is to display the value of i each time the loop executes. Displaying i
_before_ the error occurs tells us what value of i is causing the
problem. Because the error is occurring when you try to index ts,
perhaps adding:

cat(dim(ts),"\n")
for(i in 1:N) {
...

_before_ the loop starts will tell you what the dimensions of ts are.
It way well be a list that you have to use a different syntax for
indexing. An even more complete description of ts can be had like
this:

str(ts)

Unfortunately I am about to log out and get some sleep so I will not
be able to continue answering until some time tomorrow.

Jim
On Sat, Oct 6, 2018 at 7:32 PM Subhamitra Patra
<subhamitra.patra using gmail.com> wrote:
>
> I am extremely sorry to say that both the suggestions did not work.
>
> I did not understand the suggestion of Prof. Lemon. So, Sir, Can you please clarify me your suggestion?
>
>  I tried the suggestion of Ruipbarradas. It does not work.
>
>
> Please help me out for which I shall be always grateful to you.
>
> Thanks in advance.
>
> On Sat, Oct 6, 2018 at 2:48 PM ruipbarradas <ruipbarradas using sapo.pt> wrote:
>>
>> Hello,
>>
>> Instead of nrow try all uppercase:
>>
>> N <- NROW (ts)
>>
>>
>> Hope this helps,
>>
>> Rui Barradas
>>
>>
>>
>>
>> Enviado a partir do meu smartphone Samsung Galaxy.
>> -------- Mensagem original --------
>> De: Subhamitra Patra <subhamitra.patra using gmail.com>
>> Data: 06/10/2018 10:14 (GMT+00:00)
>> Para: drjimlemon using gmail.com
>> Cc: r-help using r-project.org
>> Assunto: Re: [R] Requesting for help on the problem of "subscript out of bounds"
>>
>> Hello Sir,
>>
>> I tried by defining mat, but still facing the same problem.
>>
>> Hence, mat represents the time series. This time, I defined it as ts and
>> tried, but still having the same problem.
>>
>> In particular, the problem is coming in the following line
>> *for (i in 1:N){*
>> *+     r[i]<-approx_entropy(ts[i,], edim = 2, r = 0.2*sd(ts[i,]), elag =
>> 1) *
>>
>> where i is unable to synchronize with the no. of rows i.e. rows and thus I
>> am getting the error of
>>
>> *Error in `[<-`(`*tmp*`, i, , value = ts[i:(N - m + i)]) :   subscript out
>> of bounds*
>>
>> For your reference, I am providing my full code with an explanation as
>> follows.
>>
>> The function
>>
>> approx_entropy(ts, edim = 2, r = 0.2*sd(ts), elag = 1)
>>
>> from the package,pracma I am calculating the approximate entropy of time
>> series.ts
>>
>> I have a matrix of time series (one series per row i.e. 51 rows and 1
>> column)  and I would estimate the approximate entropy for each of the rows,
>> storing the results in a vector. So, I have written a code
>>
>> library(pracma)
>>
>> N<-nrow(ts)
>> r<-matrix(0, nrow = N, ncol = 1)for (i in 1:N){
>>      r[i]<-approx_entropy(ts[i,], edim = 2, r = 0.2*sd(ts[i,]), elag = 1)}
>>
>> * After calculating for 1 series, I need to calculate the same things for
>> the multiple series by changing the dimension of the ncol.*
>>
>> Please help me in this regard.
>>
>> Thanks in advance.
>>
>> On Sat, Oct 6, 2018 at 2:22 PM Jim Lemon <drjimlemon using gmail.com> wrote:
>>
>> > Hi Subhamitra,
>> > Where I think the error arises is in the line:
>> >
>> >  N<-nrow(mat)
>> >
>> > Since we don't know what "mat" is, we don't know what nrow(mat) will
>> > return. If "mat" is not a matrix or data frame, it is likely to be
>> > NULL. Try this:
>> >
>> > print(N)
>> >
>> > after defining it and see what it is.
>> >
>> > Jim
>> >
>> > On Sat, Oct 6, 2018 at 5:51 PM Subhamitra Patra
>> > <subhamitra.patra using gmail.com> wrote:
>> > >
>> > > Hello friends,
>> > >
>> > > I am very new in this R world. But, still doing some programming by
>> > > learning. While running one code, I found the problem of "subscript out
>> > of
>> > > bounds". Please suggest me how to overcome this problem? For your
>> > > reference, I am uploading my code here.
>> > >
>> > > The function
>> > >
>> > > approx_entropy(ts, edim =2, r = 0.2*sd(ts), elag = 1)
>> > >
>> > > library(pracma)
>> > >
>> > > N<-nrow(mat)
>> > > r<-matrix(0, nrow = N, ncol = 1)for (i in 1:N){
>> > >      r[i]<-approx_entropy(mat[i,], edim = 2, r = 0.2*sd(mat[i,]), elag =
>> > 1)}
>> > >
>> > > After running this code, I am getting the error of
>> > >
>> > > *"subscript out of bounds"*
>> > >
>> > > Please help me for which I shall be always grateful to you.
>> > >
>> > > Thanks in advance.
>> > >
>> > >
>> > >
>> > > --
>> > > *Best Regards,*
>> > > *Subhamitra Patra*
>> > > *Phd. Research Scholar*
>> > > *Department of Humanities and Social Sciences*
>> > > *Indian Institute of Technology, Kharagpur*
>> > > *INDIA*
>> > >
>> > >         [[alternative HTML version deleted]]
>> > >
>> > > ______________________________________________
>> > > R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> > > https://stat.ethz.ch/mailman/listinfo/r-help
>> > > PLEASE do read the posting guide
>> > http://www.R-project.org/posting-guide.html
>> > > and provide commented, minimal, self-contained, reproducible code.
>> >
>>
>>
>> --
>> *Best Regards,*
>> *Subhamitra Patra*
>> *Phd. Research Scholar*
>> *Department of Humanities and Social Sciences*
>> *Indian Institute of Technology, Kharagpur*
>> *INDIA*
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
>
>
> --
> Best Regards,
> Subhamitra Patra
> Phd. Research Scholar
> Department of Humanities and Social Sciences
> Indian Institute of Technology, Kharagpur
> INDIA