run-length-encoding Questions
7
I have no idea how to start my assignment.
We got to make a Run-length encoding program,
for example, the users enters this string:
aaaaPPPrrrrr
is replaced with
4a3P5r
Can someone help me g...
Warner asked 11/7, 2012 at 22:1
11
Solved
I have the following vectors with 0s and 1s:
test1 <- c(rep(0,20),rep(1,5),rep(0,10),rep(1,15))
test1
[1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 ...
Liddie asked 29/6, 2023 at 14:46
4
Solved
I have the following dataframe df (dput below):
> df
id value
1 1 1
2 2 3
3 3 2
4 NA 1
5 NA 3
6 8 4
7 9 2
8 10 1
9 NA 1
10 NA 3
11 15 2
12 16 1
13 NA 3
14 NA 4
15 NA 2
16 20 1
17 21 1
18 22 3
1...
Roustabout asked 21/3, 2023 at 16:10
6
Solved
data.table offers a nice convenience function, rleid for run-length encoding:
library(data.table)
DT = data.table(grp=rep(c("A", "B", "C", "A", "B"), c(2, 2, 3, 1, 2)), value=1:10)
rleid(DT$grp)
#...
Midship asked 3/11, 2015 at 19:53
6
Solved
Write code for run -length encoding of a given string
Sample Input: aaaaaaaaaabcccccc
Output: a10bc6
My code:
static void Main(string[] args)
{
string str = "aaaaaaaaaabcccccc";
var qry = ...
Binnacle asked 19/12, 2014 at 20:35
4
Solved
I have data where consecutive runs of zero are separated by runs of non-zero values. I want to create a counter for the runs of zero in the column 'SOG'.
For the first sequence of 0 in SOG, set the...
Sheepshank asked 22/11, 2014 at 12:12
4
Solved
I encountered an interview question:
Given a input String: aaaaabcddddee, convert it to a5b1c1d4e2.
One extra constraint is, this needs to be done in-place, means no extra space(array) should ...
Unlay asked 10/4, 2016 at 6:37
1
Solved
I have been experimenting with tensorflow Datasets but I cannot figure out how to efficiently create RLE-masks.
FYI, I am using data from the Airbus Ship Detection Challenge in Kaggle: https://www....
Balsa asked 4/11, 2019 at 12:13
4
Solved
Looks like an easy task, can't figure out a simpler way. I have an x vector below, and need to create group names for consecutive values. My attempt was using rle, better ideas?
# data
x <- c(1...
Benitez asked 14/6, 2016 at 10:12
4
Solved
I have a little nut to crack.
I have a data.frame where runs of TRUE are separated by runs of one or more FALSE or NA:
group criterium
1 A NA
2 A TRUE
3 A TRUE
4 A TRUE
5 A FALSE
6 A FALSE
7 A TRU...
Megohm asked 10/4, 2019 at 6:47
3
Solved
If I have a vector like
"a": 0 0 1 1 1 0 0 0 0 1 1 0 0 0
How can I generate a vector of the same length containing the count of consecutive elements, like so:
"b": 2 2 3 3 3 4 4 4 4 2 2 3 3 3
...
Fasten asked 7/1, 2019 at 10:18
3
Solved
I wish to create a sequential number within each run of equal values, like a counter of occurrences, which restarts once the value in the current row is different from the previous row.
Please fi...
Clamatorial asked 15/11, 2013 at 10:25
4
Solved
I have a dataset with repeating sequences of TRUE that I would like to label based on some conditions - by id, and by the sequence's incremental value. A FALSE breaks the sequence of TRUEs and the ...
Underlaid asked 14/5, 2018 at 6:48
1
Solved
I need to send video from a Kinect camera through a network. I'm capturing video from the following two Kinect sources:
2D color video (RGB). 32 bits per pixel. 640x480 at 30fps.
Depth data (D). 1...
Washerman asked 15/12, 2015 at 10:30
2
Solved
Problem: Given an atomic vector, find the start and end indices of runs in the vector.
Example vector with runs:
x = rev(rep(6:10, 1:5))
# [1] 10 10 10 10 10 9 9 9 9 8 8 8 7 7 6
Output from rle...
Poff asked 9/5, 2017 at 16:56
1
I have a Run length encoded vector representing some value at every position on the genome, in order. As a toy example suppose I had just one chromosome of length 10, then I would have a vector loo...
Ridenhour asked 30/8, 2016 at 8:54
4
Solved
I didn't find a solution for this common grouping problem in R:
This is my original dataset
ID State
1 A
2 A
3 B
4 B
5 B
6 A
7 A
8 A
9 C
10 C
This should be my grouped resulting dataset
State ...
Tweezers asked 15/9, 2016 at 12:56
2
Solved
In R, I want to summarize my data after grouping it based on the runs of a variable x (aka each group of the data corresponds to a subset of the data where consecutive x values are the same). For i...
Stratus asked 6/2, 2016 at 21:5
5
Solved
I'm trying to insert multiple values into an array using a 'values' array and a 'counter' array. For example, if:
a=[1,3,2,5]
b=[2,2,1,3]
I want the output of some function
c=somefunction(a,b)
...
Dirty asked 29/12, 2009 at 17:20
4
Solved
For clever usage of linear indexing or accumarray, I've sometimes felt the need to generate sequences based on run-length encoding. As there is no built-in function for this, I am asking for the mo...
Aphoristic asked 13/2, 2015 at 14:7
7
Solved
Let's say I have a one-dimensional array:
a = [1, 2, 3];
Is there a built-in Matlab function that takes an array and an integer n and replicates each
element of the array n times?
For example c...
Mesenchyme asked 22/12, 2009 at 17:23
3
Solved
I would appreciate if someone showed me an easy way to do this. Let's say I have a vector in MATLAB like
d = [3 2 4 2 2 2 3 5 1 1 2 1 2 2 2 2 2 9 2]
I want to find the series of consecutive numb...
Lymph asked 21/10, 2011 at 13:49
4
Solved
My question is similar to this one, but I would like to replicate each element according to a count specified in a second array of the same size.
An example of this, say I had an array v = [...
Lucy asked 4/3, 2010 at 20:0
3
Solved
I have a value vector A containing elements i, for example:
A = [0.1 0.2 0.3 0.4 0.5];
and say r = [5 2 3 2 1];
Now I want to create a new vector Anew containing r(i) repetitions of the val...
Waler asked 26/9, 2014 at 16:30
6
Solved
Is there a vectorised way to do the following? (shown by an example):
input_lengths = [ 1 1 1 4 3 2 1 ]
result = [ 1 2 3 4 4 4 4 5 5 5 6 6 7 ]
I have spaced out the input_lengths so it is easy t...
Wilburn asked 15/5, 2014 at 6:18
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