Displaying 11 results from an estimated 11 matches for "jialin".
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dialin
2012 Mar 12
3
how to calculate a variance and covariance matrix for a vector
...b2, b3, b4}. How can I calculate the following
matrix:
var(a) cov(a, b1) cov(a, b2) cov(a, b3) cov(a, b4)
cov(a, b1) var(b1) cov(a, b2) cov(a, b3) cov(a, b4)
...
...
cov(a, b1) cov(a, b2) cov(a, b3) cov(a, b4) var(b4)
I would very appreciate your inputs. Thank you very much.
Sincerely,
Jialin Huang
[[alternative HTML version deleted]]
2018 Mar 18
3
`@<-` modify its argument when slot is externalptr
...>
x
# An object of class "S4ClassHoldingExtptr"
# <pointer: 0x7ffc60973f30>
y
# An object of class "S4ClassHoldingExtptr"
# <pointer: 0x7ffc60973f30>
However, "subs_extptr_2" will modify both x and y.
Is this behavior expected?
Thanks,
Jialin
> sessionInfo()
R version 3.4.1 (2017-06-30)
Platform: x86_64-suse-linux-gnu (64-bit)
Running under: openSUSE Tumbleweed
Matrix products: default
BLAS: /usr/lib64/R/lib/libRblas.so
LAPACK: /usr/lib64/R/lib/libRlapack.so
locale:
[1] LC_CTYPE=en_US.UTF-
8 LC_NUMERIC=C LC_T...
2019 Jul 08
5
Format printing inside a matrix
...rop the
attributes of the input, e.g. lapply, apply -- they are not generics and it is
not wise to override them.
Overall, introducing a new S3/S4 class often brings some extra price in order
to maintain the correct behavior, which is why I tend to avoid them unless it
is necessary.
Best regards,
Jialin
On Sunday, July 7, 2019 4:43:59 PM PDT Abby Spurdle wrote:
> contains an array of question marks, which
> isn't helpful.
>
> Would it be possible for the print method for both matrices and arrays
> (conditional on having a list type), call the format method for each
> object,...
2012 Mar 05
1
How to identify a matrix which causes memory limit?
...running a simulation on an old computer with memory of 512M. I
constantly received a warning of "cannot allocate a vector of ...". How can
I identify the matrix causing the problem? Is there any way to fix this
issue?
I would very appreciate your inputs. Thank you very much.
Sincerely,
Jialin Huang
[[alternative HTML version deleted]]
2018 Mar 28
1
as.pairlist does not convert call objects
Dear all,
It seems that as.pairlist does not convert call objects, producing
results like the following:
> is.pairlist(as.pairlist(quote(x + y)))
[1] FALSE
Should this behavior be expected?
Thanks,
Jialin
> sessionInfo()
R version 3.4.1 (2017-06-30)
Platform: x86_64-suse-linux-gnu (64-bit)
Running under: openSUSE Tumbleweed
Matrix products: default
BLAS: /usr/lib64/R/lib/libRblas.so
LAPACK: /usr/lib64/R/lib/libRlapack.so
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
[3]...
2019 Jul 08
0
Format printing inside a matrix
On 7/7/19 17:41, Jialin Ma wrote:
> Hi Abby,
>
> Thanks a lot for your paraphrasing and your suggestion!
>
> The problem of wrapping the list into a S3/S4 object, i.e. subclassing array
> or matrix, is that one also has to define a bunch of methods for subsetting,
> joining, etc, in order to make it...
2018 Mar 18
0
`@<-` modify its argument when slot is externalptr
On Sun, 18 Mar 2018, Jialin Ma wrote:
> Dear all,
>
> I am confused about the inconsistent behaviors of `@<-` operator when
> used in different ways. Consider the following example:
>
> library(inline)
>
> # Function to generate an externalptr object with random address
> new_extptr <- cfu...
2019 Jul 02
3
Format printing inside a matrix
...4] [,5]
[1,] ? ? ? ? ?
[2,] ? ? ? ? ?
Is it possible that the print method for matrix can call some type of generic
such as `as.character` or `format` when it encounters such cases? Or is there
any other place that I can override without introducing a new S3 class?
Thanks!
Jialin Ma
2019 Jul 08
1
Format printing inside a matrix
...# [,1] [,2]
# [1,] "'5" "'7"
# [2,] "'6" "'8"
And there is a bunch of other methods that needs to be defined for this
specific class. This seems too much if I simply want the default list behavior
plus printing method.
Best regards,
Jialin
2011 Nov 28
0
A simulation project based Graded Response Model with multiple groups
...number=2,3,4,6,9, 12), different sample size for each group (N=250,
500, and 1000), different values of as and bs, and some other criteria.
How can I do it in R? Do you think it would be easier to do it in other
languages other than R?
I would very appreciate your inputs.
Thank you.
Sincerely,
Jialin
[[alternative HTML version deleted]]
2019 Jul 08
1
Format printing inside a matrix
A generic for displaying an object in a cell would be a reasonable
solution for this particular problem. However, as soon as you start
treating these objects as data (like putting them into a matrix),
you're likely going to want vectorized operations over them, which
means formalized vector and matrix classes. S4Vectors in Bioconductor
facilitates this for vectors, but not for higher-order