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adding noise to a signal in python
...NR:
# Adding noise using target SNR
# Set a target SNR
target_snr_db = 20
# Calculate signal power and convert to dB
sig_avg_watts = np.mean(x_watts)
sig_avg_db = 10 * np.log10(sig_avg_watts)
# Calculate noise according to [2] then convert to watts
noise_avg_db = sig_avg_db - target_snr_db
nois...
.prop('checked',false) or .removeAttr('checked')?
...ked',false) is correct way when using this version.
Original answer (from 2011):
For attributes which have underlying boolean properties (of which checked is one), removeAttr automatically sets the underlying property to false. (Note that this is among the backwards-compatibility "fixes" added in j...
Pandas - How to flatten a hierarchical index in columns
... work with the latest version of pandas. It works with 0.18 but not with 0.20 (latest as of now)
– TH22
Oct 10 '17 at 20:59
1
...
Is there YAML syntax for sharing part of a list or map?
...
answered Jan 18 '17 at 20:11
Alexander RyzhovAlexander Ryzhov
1,69122 gold badges1515 silver badges1616 bronze badges
...
Get day of week in SQL Server 2005/2008
If I have a date 01/01/2009, I want to find out what day it was e.g. Monday, Tuesday, etc...
10 Answers
...
The cast to value type 'Int32' failed because the materialized value is null
...n a nullable version of the underlying type.
– Suncat2000
Jul 18 '14 at 12:19
2
@recursive: Your ...
bash assign default value
...
209
Use a colon:
: ${A:=hello}
The colon is a null command that does nothing and ignores its ar...
PATH issue with pytest 'ImportError: No module named YadaYadaYada'
...
20 Answers
20
Active
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MYSQL OR vs IN performance
...e equivalent queries (for consistency, I used sql_no_cache):
IN: 2.34969592094s
OR: 5.83781504631s
Update:
(I don't have the source code for the original test, as it was 6 years ago, though it returns a result in the same range as this test)
In request for some sample code to test this, here is ...
How can I add numbers in a Bash script?
...er values?
– sorpigal
Jun 14 '11 at 20:20
1
Yew they are existed but the one variable is double.....