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

[Subhamitra Patra]

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*

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