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
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Exception when using jtransform in android - java.lang.NoClassDefFoundError: edu.emory.mathcs.jtransforms.fft.DoubleFFt_1D
When I am using jTransform.
https://sites.google.com/site/piotrwendykier/software/jtransforms
with my app to perform FFT to my pcm data, I got the exception
java.lang.NoClassDefFoundError: edu.emory.mathcs.jtransforms.fft.DoubleFFt_1D
while I added…
Aashutosh Shrivastava
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SQL query for last entries in a period
I'm trying to write a SQL query for Oracle SQL in order to retrieve the last records for a certain period frequency. For example, say the frequency is Quarterly, (I'd also like monthly and annually to work), I can provide the start dates and end…
user963084
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XAudio2 filter radian frequency
In the documentation for the XAudio2 filter parameters it mentions
Filter radian frequency calculated as (2 * sin(pi * (desired filter cutoff frequency) / sampleRate))
Can someone explain to me where that formula comes from? Because the only…
user782220
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Calculate relative frequency of list terms and its sum in R?
I have data saved in a long list. This is an example of the first six lines / records:
A <- list(c("JAMES","CHARLES","JAMES","RICHARD"),
c("JOHN","ROBERT","CHARLES"),
…
user1496104
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Determining CPU Frequency in Windows
I'm having a bit of trouble finding a reliable method of determining CPU frequency in Windows (7).
I've tried using Perfmon, but it has a maximum sampling frequency of 1 Hz. Also, I don't have kernel-level access, so I can't use machine specific…
Shookit
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Get frequency of a noisy sample vector
I mostly need a general algorithm which i will afterwards port on my system (an Arduino board), but i'm glad to get even a hint to continue the research in other directions;
I have a set of around 650 samples covering 5 seconds representing a…
user1411688
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Audio frequency of each frame of a audio file like .mp3 .wav
Can I find a way to get frequency of each frame on a audio file like .mp3 or .wav or any other sound format using "fmod" or "cwave" libraries or even other libraries?
How can I find out this frequency in C/C++?
Erfan Loghmani
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get frequency and amplitude from wave file
I want to get frequency and amplitude from wave file using c#.
I tried NAudio and FFT, but result is nothing. can you help me please.
WaveChannel32 wave = new WaveChannel32(new WaveFileReader(open.FileName));
byte[] buffer = new byte[16384];
int…
Farid
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How to disable freqeuncy scaling on android?
How to detect the frequency when running a program on android?
I want detect the CPU usage using the top -m command, but since android kernel by default does frequency scaling, I am afraid the result from "top -m " command is not correct. So I want…
behe
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What is the theory behind active noise cancellation?
In a previous question, I had asked Why can't I simply negate the source time domain amplitude values to produce a destructive noise signal?
One of the posters said that while simply producing a inverses polarity (negated) signal will work in…
user605957
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Data Structure Decision on Efficient Frequency Calculation
Question: Which data structure is more efficient when calculating n most frequent words in a text file. Hash tables or Priority Queues?
I've previously asked a question related to this subject however after the creative responses I got confused and…
Ali
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MYSQL Weighing Results
What is the typical way to weigh results in MYSQL?
I have a table with a column called 'category_id' which goes from 1-10.
How do I weigh results so a higher frequency of results with one category_id will show up vs. another?
user1124535
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java music get the wave length (frequency) of a song?
Just starting a new program and do you guys have any ideas in how to get a exact frequency of a song at specific time of a song. like import the song then for every .01 sec it will store the frequency of the song in a array? any ideas? Just don't…
steven minkus
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How to count the frequency of bundle of number using c#?
Can somebody help me to run this program using c#. This program is to calculate the frequency of the number, for example 12 appear 10x. Before this I try to sort all list number in a horizontal line. Then I compare the same number, then count++, …
user1262018
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