The rate at which a thing occurs or is found.
The rate at which a thing occurs or is found.
Questions tagged [frequency]
2858 questions
8
votes
3 answers
How to organize list by frequency of occurrence and alphabetically (in case of a tie) while eliminating duplicates?
Basically if given a list:
data = ["apple", "pear", "cherry", "apple", "pear", "apple", "banana"]
I'm trying to make a function that returns a list like this:
["apple", "pear", "banana", "cherry"]
I'm trying to make the return list ordered by most…
user2180683
- 209
- 3
- 6
8
votes
10 answers
Finding Frequency of numbers in a given group of numbers
Suppose we have a vector/array in C++ and we wish to count which of these N elements has maximum repetitive occurrences and output the highest count. Which algorithm is best suited for this job.
example:
int a = { 2, 456, 34, 3456, 2, 435, 2, 456,…
Abhishek Mishra
- 5,002
- 8
- 36
- 38
8
votes
4 answers
Mysql count frequency
I've checked similar questions but it didnt help in my precise question.
So, my table goes like this:
id age
1 30
2 36
3 30
4 52
5 52
6 30
7 36
etc..
I need to count the frequency of ages:
age freq
30 2
36 3
52 2
How can I grab this…
noneJavaScript
- 835
- 3
- 21
- 41
7
votes
2 answers
How do I count the number of times any two given values occur together in a row in R?
I am working with a data frame like this, with the ID column indicating a specific publication:
ID AuthorA AuthorB AuthorC
1 Chris Lee Jill
2 Jill Tom Lee
3 Tom Chris Lee
4 Lee Jill NA
5 Jill Chris NA
I…
Frowin Becker
- 203
- 1
- 4
7
votes
3 answers
Create a variable capturing the most frequent occurence by group
Define:
df1 <-data.frame(
id=c(rep(1,3),rep(2,3)),
v1=as.character(c("a","b","b",rep("c",3)))
)
s.t.
> df1
id v1
1 1 a
2 1 b
3 1 b
4 2 c
5 2 c
6 2 c
I want to create a third variable freq that contains the most frequent observation…
Fred
- 1,833
- 3
- 24
- 29
7
votes
2 answers
How to properly scale frequency axis in Fast Fourier Transform?
I am trying some sample code taking the FFT of a simple sinusoidal function. Below is the code
import numpy as np
from matplotlib import pyplot as plt
N = 1024
limit = 10
x = np.linspace(-limit, limit, N)
dx = x[1] - x[0]
y = np.sin(2 * np.pi * 5 *…
MasterYoda
- 220
- 3
- 10
7
votes
0 answers
Sound frequency detection
I am currently attempting to create a sound frequency detection application on the iPhone. I have been informed that the algorithm I need for frequency detection of a single frequency is the goertzel algorithm.
However, I am currently struggling to…
123hal321
- 2,080
- 4
- 24
- 25
7
votes
1 answer
How to generate sounds by frequency in Java?
How do I generate my own sound by frequency in Java?
I can play WAV files or MIDI files, but now I don't need this. I want to create a simple guitar program, and I want to play chords with this program. But I don't know how to make the sounds to the…
victorio
- 6,224
- 24
- 77
- 113
7
votes
2 answers
How to collapse rows of a frequency table to add their counts in a new column?
I have a dataframe with sample classifications:
Seq_ID Family Father Mother Sex Role Type
1 SSC02219 11000. 0 0 Male Father Parent
2 SSC02217 11000. 0 …
Carmen Sandoval
- 2,266
- 5
- 30
- 46
7
votes
1 answer
What is the most reliable way to determine the CPU clock frequency of Android phones?
I found some references and ended up with the following code:
String[] args = { "/system/bin/cat", "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq" };
cmd = new ProcessBuilder(args);
Process process = cmd.start();
InputStream in =…
Bob
- 111
- 1
- 4
7
votes
6 answers
Does gensim.corpora.Dictionary have term frequency saved?
Does gensim.corpora.Dictionary have term frequency saved?
From gensim.corpora.Dictionary, it's possible to get the document frequency of the words (i.e. how many document did a particular word occur in):
from nltk.corpus import brown
from…
alvas
- 115,346
- 109
- 446
- 738
7
votes
3 answers
How to change clock frequency in Android?
I'm a new to software development on Android.
I want to make an application like SetCPU that can manipulate CPU frequency in Android.
But I couldn't find some related APIs or materials.
I want to know following two things sincerely.
Are there APIs…
zephyrus
- 71
- 1
- 1
- 2
7
votes
1 answer
What range sound frequency can be measured from iPhone's microphone?
I want to know the range of frequency that the iPhone's microphone can listen and can we play the least frequency sound recorded by iPhone's microphone?
rockey
- 638
- 4
- 16
- 34
7
votes
1 answer
calculate the frequency in R
Here is my data
> a
[1] Male Male Female Male Male Male Female Female Male Male Female Male Male Male
[15] Female Female Female Male Female Male Female Male Male Female Male Male Female Male
[29] Male Male …
lightsnail
- 788
- 5
- 20
7
votes
1 answer
Counting number of instances of a condition per row R
I have a large file with the first column being IDs, and the remaining 1304 columns being genotypes like below.
rsID sample1 sample2 sample3...sample1304
abcd aa bb nc nc
efgh nc nc nc nc…
nchimato
- 443
- 4
- 8
- 18