uint8

Dear R users,

 I am trying to join two 8 bit integers, as defined by the
"coolbutuseless/uint8" package,
without success:
library(uint8)
x1 = uint8(3)> x1[1] = as.uint8(1)
x1[2] = as.uint8(2)> x2 = uint8(3)> x2[1] = as.uint8(2)> x1[1] 1 2 0> x2[1] 2 0 0> xx = c(x1,x2)> xx[1] 01 02 00 02 00 00
In the real application the first array (x1) is extremely large (order
15-20 Gbytes)
while the second is relatively small, so that I cannot afford, given my RAM,
to define a third array, as
x3 = uint8(length(x1)+length(x2))
and then fill its components, but I need to join the two arrays.

Is anyone aware of the right procedure in R or so kind to give suggestions ?
(A possibility would be to switch to C/C++, but I would prefer not to).

Many thanks,

Luca

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On Thu, Feb 4, 2021 at 2:36 PM Luca Passalacqua via R-help <

Dear R users,

 I am trying to join two 8 bit integers, as defined by the
"coolbutuseless/uint8" package,
without success:

library(uint8)

x1 = uint8(3)> x1[1] = as.uint8(1)
x1[2] = as.uint8(2)> x2 = uint8(3)> x2[1] = as.uint8(2)> x1[1] 1 2 0>
x2[1] 2 0 0> xx = c(x1,x2)> xx[1] 01 02 00 02 00 00

In the real application the first array (x1) is extremely large (order
15-20 Gbytes)
while the second is relatively small, so that I cannot afford, given my
RAM,
to define a third array, as

x3 = uint8(length(x1)+length(x2))
and then fill its components, but I need to join the two arrays.

Is anyone aware of the right procedure in R or so kind to give suggestions
?
(A possibility would be to switch to C/C++, but I would prefer not to).

Many thanks,

Luca

--
________________________________________________________
Le informazioni
contenute in questo messaggio di posta elettronica sono strettamente
riservate e indirizzate esclusivamente al destinatario. Si prega di non
leggere, fare copia, inoltrare a terzi o conservare tale messaggio se non
si ? il legittimo destinatario dello stesso. Qualora tale messaggio sia
stato ricevuto per errore, si prega di restituirlo al mittente e di
cancellarlo permanentemente dal proprio computer.
The information contained
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the addressee only.  If you are not the intended recipient, please do not
read, copy, forward or store it on your computer. If you have received the
message in error, please forward it back to the sender and delete it
permanently from your computer system.

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Hi Luca,

The answer to your question depends on your application. What do you want
to do with x3? Do you really need a native vector to represent x1 and x2?
Or you just want an object that behaves like it is a joint of x1 and x2? I
do not think you can have a native vector x3 without paying anything, this
is impractical, but if all you want to do is to have something that behaves
like x3, I think R's S4 class can achieve that.

Best,
Jiefei

On Fri, Feb 5, 2021 at 6:36 AM Luca Passalacqua via R-help <

Dear R users,

 I am trying to join two 8 bit integers, as defined by the
"coolbutuseless/uint8" package,
without success:

library(uint8)

x1 = uint8(3)> x1[1] = as.uint8(1)
x1[2] = as.uint8(2)> x2 = uint8(3)> x2[1] = as.uint8(2)> x1[1] 1 2 0>
x2[1] 2 0 0> xx = c(x1,x2)> xx[1] 01 02 00 02 00 00

In the real application the first array (x1) is extremely large (order
15-20 Gbytes)
while the second is relatively small, so that I cannot afford, given my
RAM,
to define a third array, as

x3 = uint8(length(x1)+length(x2))
and then fill its components, but I need to join the two arrays.

Is anyone aware of the right procedure in R or so kind to give suggestions
?
(A possibility would be to switch to C/C++, but I would prefer not to).

Many thanks,

Luca

--
________________________________________________________
Le informazioni
contenute in questo messaggio di posta elettronica sono strettamente
riservate e indirizzate esclusivamente al destinatario. Si prega di non
leggere, fare copia, inoltrare a terzi o conservare tale messaggio se non
si ? il legittimo destinatario dello stesso. Qualora tale messaggio sia
stato ricevuto per errore, si prega di restituirlo al mittente e di
cancellarlo permanentemente dal proprio computer.
The information contained
in this e mail message is strictly confidential and intended for the use of
the addressee only.  If you are not the intended recipient, please do not
read, copy, forward or store it on your computer. If you have received the
message in error, please forward it back to the sender and delete it
permanently from your computer system.

--

        [[alternative HTML version deleted]]

______________________________________________
R-help at 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
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