seq is short for sequence. A sequence is an ordered list of objects (or events). Like a set, it contains members (also called elements or terms), and the number of terms (possibly infinite) is called the length of the sequence. Unlike a set, order matters, and exactly the same elements can appear multiple times at different positions in the sequence. Sometimes, sequence is used as a generic name for both list, array and set for convenience.
Questions tagged [seq]
730 questions
0
votes
1 answer
What is the defference between seq() and sequence() in R?
I am new to R and am wondering what is the difference between seq() and sequence(). Both entered into R give different results:
> seq(c(10,5))
[1] 1 2
> sequence(c(10,5))
[1] 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5
Can anyone help me with…
rocc
- 153
- 1
- 7
0
votes
0 answers
seq() in R producing mix of numbers and characters
Strange one this. seq() is creating a mix of numbers and characters, which really screws some things up!
If I create the following sequence:
tmp <- seq(0.1, 2, by=0.1)
Then I get a sequence!
[1] 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3…
0
votes
1 answer
Converting date in For Loop in R - origin must be supplied
I have a sequence of dates in R, and for each date I need to get the year, month, and day. I tried to use the strftime function to print out the year, but R behaves very strangely. This code fails:
# sequence of dates
dates <-…
jirikadlec2
- 1,256
- 1
- 23
- 36
0
votes
1 answer
How to generate a sequence based on two columns in R?
Below you can recreate my data in R. I would like to generate a sequence of numbers based on two individual columns. In this example of real data my column names are :
df= or10x1BC
"Tank" "Core" "BCl" "BCu" "Mid" "TL" "SL"
I wish to use the…
MockCommunity1
- 31
- 1
- 1
- 10
0
votes
1 answer
Generate new scala sequence from another sequence
I have a sequence of ids and a function which return an Option[workItem] for each id. All I want to do is generate a sequence of workItem from these two things. I tried various combinations of maps, foreach and for comprehension and nothing…
ocwirk
- 1,079
- 1
- 15
- 35
0
votes
3 answers
many to many join (same ID with different date)
I'm doing an analysis using SQL and R, I want to join two tables like below listed:
Table 1:
ID date
a11 20150302
a11 20150302
a22 20150303
a22 20150304
a33 20150306
a44 20150306
a55 20150307
a66 20150308
a66 20150309
a66 20150310
Table 2
ID …
WayToNinja
- 285
- 4
- 14
0
votes
1 answer
How to implement an iterator in Scala making use of sequences as does this F# code?
I was wondering what the equivalent Scala code would be for this short F# snippet:
seq {
for i in 1..10 do
printfn "%d"
yield i
}
Is it actually possible to have something like that in Scala?
What I'm actually attempting to implement,…
devoured elysium
- 101,373
- 131
- 340
- 557
0
votes
2 answers
Two-level 'for' loop of a customised list
Using a two-level for loop and seq works fine, and the code
for i in `seq 0 3`; do for j in `seq 0 3`; do echo $i $j; done; done
gives the expected output:
0 0
0 1
1 0
1 1
But if I want a more customised list of numbers:
for i in '-1 4.5'; do for…
jorgen
- 3,425
- 4
- 31
- 53
0
votes
1 answer
Extract sequence of positive hit from vcountPattern in R
I conducted small RNA sequencing and try to analyze result fastq file.
First I imported the fastq file into R using ShortRead package and converted to DNAstringSet
reads <- readFastq("test.fq")
seq <- sread(reads)
To look for reads that contain…
Zipsa
- 77
- 1
- 9
0
votes
1 answer
F# Threading Changing State Through Unfold
I'm trying to process a sequence of items whereby the process step relies on some additional cumulative state from the prior items (ordering isn't important).
Essentially:
I have a Seq<'A>
I have a (Type * int) list referred to as the skip list
I…
Clint
- 6,133
- 2
- 27
- 48
0
votes
3 answers
How to repeat a sequence of numbers to the end of a column?
I have a data file that needs a new column of identifiers from 1 to 5. The final purpose is to split the data into five separate files with no leftover file (split leaves a leftover file).
Data:
aa
bb
cc
dd
ff
nn
ww
tt
pp
with identifier column:
aa…
Justin Buchanan
- 107
- 1
- 8
0
votes
1 answer
For each element of given vector, generate sequence with X, X-1, ..., X-(N-1)
So I have been trouble with creating a counter, hopefully you all will be able to help. Lets say I have a vector
x <- c(40,10,60)
The desired output would be a new matrix 3 x n each row being a new date looking something like this..
40 39 38 37…
Adam Warner
- 1,334
- 2
- 14
- 30
0
votes
1 answer
replacing nested for loop with sapply in R
So I have 10 parameters, with 7 fixed and 3 varying using seq. Each varying parameter has 10 possibilities. Right now I create an empty data frame and fill it after going through a bunch of functions and generating an output for each combination of…
adaml768
- 29
- 1
- 7
0
votes
1 answer
scapy send fake http response issue , whireshark shows the seq and ack is very big than i set
I'm doing a test about sending me the fake http response by using scapy,
however whireshark shows the fake response is "TCP ACKed unseen segment",
here is my code:
pkgs = sniff(iface="eth0",filter="src host 192.168.1.153 and dst host…
Flavin
- 11
0
votes
0 answers
R Sequence Generation For a subset
I have requirement for sequence generation in R, but it needs to be unique in combination with another field.
For example, my data:
GrpID Data NewSeqId
100 683 1
100 534 2
100 234 3
200 456 1
200 23 …
