frequency-analysis

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How do I run a high pass or low pass filter on data points in R?

I am a beginner in R and I have tried to find information about the following without finding anything.[详细]

2023-03-29 13:24 分类：问答
R plot frequency of strings with specific pattern

Given a data frame with a column that contains strings. I would like to plot the frequency of strings that bear a certain pattern. For example[详细]

2023-03-15 07:10 分类：问答
Fourier Transformation -

I\'ve been doing a lot of research on this topic and I\'m finally getting somewhere. Below is two complex numbers from the java code I\'m using:[详细]

2023-03-13 05:21 分类：问答
Passing AudioQueueBufferRef data to FFT function!

I am trying to compute the frequency of a given sound process through the microphone on the iphone. I\'ve read all the post about FFT (including all apple code examples e.g aurioTouch,SpeakHere), but[详细]

2023-03-06 19:19 分类：问答
How can I use lucene's shingleanalyzerwrapper + standardanalyzer + indexreader?

I hope you can help me with this problem. What I intend to do: Given a right text, I want to count the frequencies for every stemmized token ngrams without the stopwords(in other words, the stopwords[详细]

2023-03-04 22:38 分类：问答
Frequency Analysis in Python -Print letters with frequency rather than numbers with frequency

s=array1 #user inputs an array with text in it n=len(s) f=arange(0,26,1) import collections dict = collections.defaultdict(int)[详细]

2023-03-04 20:11 分类：问答
Auriotouch, get musical note from frequency FFT

I\'m developing a kind of guitar tuner. I have a function that gives me the FFT, and the values of the FFt for each frequency.[详细]

2023-02-16 23:42 分类：问答
Bash script frequency analysis of unique letters and repeating letter pairs how should i build this script?

Ok,first post.. So I have this assignment to decrypt cryptograms by hand,but I also wanted to automate the process a little if not all at least a few parts,so i browsed around and found some sed and[详细]

2023-02-11 15:26 分类：问答
How to use cepstral?

Recently I asked this question: How to get the fundamental frequency from FFT? (you don\'t actually need to read it)[详细]

2023-02-08 21:15 分类：问答
Summary in R for frequency tables?

I have a set of user recommandations review=matrix(c(5:1,10,2,1,1,2), nrow=5, ncol=2, dimnames=list(NULL,c(\"Star\",\"Votes\")))[详细]

2023-02-08 12:25 分类：问答