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How do I obtain the frequencies of each value in an FFT?
... where Fs is the sample rate and N is the size of the FFT. The next bin is 2 * Fs / N. To express this in general terms, the nth bin is n * Fs / N.
So if your sample rate, Fs is say 44.1 kHz and your FFT size, N is 1024, then the FFT output bins are at:
0: 0 * 44100 / 1024 = 0.0 Hz
1: ...
Round to at most 2 decimal places (only if necessary)
I'd like to round at most 2 decimal places, but only if necessary .
79 Answers
79
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Replace values in list using Python [duplicate]
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207
Build a new list with a list comprehension:
new_items = [x if x % 2 else None for x in items]...
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How to check if all elements of a list matches a condition?
I have a list consisting of like 20000 lists. I use each list's 3rd element as a flag. I want to do some operations on this list as long as at least one element's flag is 0, it's like:
...
JavaScript displaying a float to 2 decimal places
I wanted to display a number to 2 decimal places.
10 Answers
10
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How do I extract a sub-hash from a hash?
...main the same:
h1 = {:a => :A, :b => :B, :c => :C, :d => :D}
h2 = h1.select {|key, value| [:b, :d, :e, :f].include?(key) } # => {:b=>:B, :d=>:D}
h1 = Hash[h1.to_a - h2.to_a] # => {:a=>:A, :c=>:C}
And if you want to patch that into the Hash class:
class Hash
def ...
Array slices in C#
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201
Arrays are enumerable, so your foo already is an IEnumerable<byte> itself.
Simply use LI...
How to convert a scala.List to a java.util.List?
... first have to convert the Scala List into a mutable collection.
On Scala 2.7:
import scala.collection.jcl.Conversions.unconvertList
import scala.collection.jcl.ArrayList
unconvertList(new ArrayList ++ List(1,2,3))
From Scala 2.8 onwards:
import scala.collection.JavaConversions._
import scala.c...