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
0
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0 answers
Can I send data over radio signals from Android device
I have a question regarding the radio signals, is it possible to send data over a particular frequency band from android ? Without using any external module or Arduino/raspberry pi.
For example sending the data over 60MHz frequency, from android and…
Meet Miyani
- 21
- 3
0
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0 answers
ESP32 frequency modulation using DAC
Is it possible to generate modulated wave using ESP32 (with or without) it's DAC? I would like to generate signal with carier frequency and modulation frequency.
Andreisk
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- 1
- 10
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Word Frequency Counter encounters error on first letter
def byFreq():
filename = open("alice.txt", "r", encoding="utf-8-sig")
infile = filename.read()
words = infile.split()
return len(words)
def count_words(file_name, output_amount):
filename = open(file_name, "r",…
lobackup
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- 1
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Count Number of Consecutive Occurrence of values in Table in sql server
I have a teable like
ID Name
1 A
2 A
3 A
4 B
5 B
6 C
7 C
8 B
9 A
10 C
I want like this frequency count in increment
ID Name Frequency
1 A 1
2 A 2
3 A 3
4 B 1
5 B 2
6 C 1
7 C 2
8 B 3
9 A …
Anup Ghimire
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- 1
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votes
1 answer
Jumping on the Cloud in C Hacker Rank
I have written a solution for a HackerRank question jumping on clouds in C language. The question is:
There is a new mobile game that starts with consecutively numbered clouds. Some of the clouds are thunderheads and others are cumulus. The player…
Jenny
- 1
0
votes
2 answers
How do I merge a frequency count back onto a table in postgresql?
I am attempting to count the number of each category and merge it back onto the table by overwriting the table in postgresql.
This is the main table I have (Named Titanic, containing the columns in…
Andy McDill
- 3
- 1
0
votes
1 answer
How to find most frequent string value in a csv column and return it? (Python)
(Not allowed to use pandas)
I am very new to python and struggling with this question. I am trying to create a function. I have a CSV file (called personal_info.csv) with a bunch of different columns (full_name, weight_b, height_c, etc). I am trying…
Emppy
- 15
- 4
0
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0 answers
Time Series Analysis with weekly data, how to define frequency?
I am trying to analyze this time series data from the Wooldridge Econometrics book containing weekly data on the New York Stock Exchange, beginning in the year 1976 January and ending in 1989.
I have never worked with the ts() function before but I…
Fabio
- 21
- 2
0
votes
1 answer
Frequency of Occurrence of values above a certain value across many columns?
I have a dataset with many columns and thousands of rows. I am trying to get another column, foo which has the frequency that a value above 100 occurs in a row.
structure(list(S026401.R1 = c(0L, 0L, 0L, 0L, 0L), S026404.R1 = c(0L,
0L, 0L, 0L, 0L),…
sscoresby
- 67
- 5
0
votes
1 answer
How can I find the frequency of characters in percentage given a big dataframe?
So, I have a big data frame which I imported from Excel to RStudio, its dimension is along the 2000x124. I'm able to filter this 2000 so that I work with smaller groups of 100sx124.
On this dataframe each row is an individual and the columns show…
user20666063
- 3
- 2
0
votes
1 answer
Alphabetize and word frequency from a file using strtok in C
My goal is to analyze a text file, tokenize each word, then alphabetize each word with its word frequency.
Example:
Input: The house is on the ground on earth.
Output:
earth - 1
ground - 1
house - 1
is - 1
on - 2
the - 2
I have been able to open…
NM215
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- 1
0
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1 answer
Why is my terminal on java showing -1 as one of the values in array?
In my java program, I am trying to display a table of two single arrays in descending order. I have managed to display it in both ascending and descending order. However, there is an additional array element -1 in my terminal. The -1 can be seen in…
StudentOfLife
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- 4
0
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0 answers
Controlling for number of words in a tweet, how many times do words from a dictionary occur
I have two datasets with a number of tweets, one about womens football and one about mens football. I also have a custom dictionary of feminine coded words, and my goal is to find out, whilst controlling for the number of words in a tweet, how often…
Emily_Fl
- 1
0
votes
0 answers
How to Run binom.test over multiple columns to test the frequency of (dis)appeared species in R?
My dataset contains presence/absence data of plant species at two different time points (Occurence_2000, Occurrence_2022), as well as the difference between the observations (Difference). A total of 29 plots were examined and there are 206 species.…
Rina
- 1
0
votes
0 answers
How to generate a random signal in time domain with a defined frequency bandwidth ? (example : bandwidth 0-60Hz)
I want to generate on python a signal that is random in the time domain but i want it to have a bandwidth in the frequency domain equals to 0-60 hz.
I dont know from where to start. I'm new to python.
Mehdi Zakaria
- 11
- 3