diffa | A real time health checking tool | Machine Learning library
kandi X-RAY | diffa Summary
kandi X-RAY | diffa Summary
Diffa provides real time health checks between arbitrary system components. For more information, please see the website:
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QUESTION
I have three time-series of daily frequencies named a, b, c. I have transformed the three time series via zoo and then run three tests to check for stationarity also detailed here:
- Ljung-Box is <0.01 for all
- ADF hovers around 0.01 for all (0.0104, 0.01395, 0.0151), so under 0.05
- KPSS test is <0.01 for two and 0.06 for one
This tells me that c is stationary and a and b are not. To transform the two non-stationary time series to stationary, I use diff()
...ANSWER
Answered 2020-Sep-20 at 19:27A VECM works with non-stationary series so you will have an order of integration to be stationary I(1).
https://pdf4pro.com/view/vector-error-correction-models-215587.html
QUESTION
I try to make some calculations with the following dataset:
...ANSWER
Answered 2020-Jul-27 at 02:08This code is a little long, but I believe it is clear and easy to debug/edit.
QUESTION
I am looking to understand why this simple DateTime operation (2020-07-01)->diff(2020-07-31)
cannot be trusted.
ANSWER
Answered 2020-Jun-16 at 16:13Short answer: yes, it's a bug.
I've simplified your test case to make it more obvious:
QUESTION
I have several DFs derived from a Panda binning process using the below code;
...ANSWER
Answered 2020-Mar-02 at 19:52The core logic: You need to use outer-join on the column 'time'
to merge
each of the sampled-dataframes together to achieve your objective. Finally resetting the index to the column time completes the solution.
I will use the dummy data I created below to create a reproducible solution.
Note: I have used
df
as the final dataframe anddf0
as the original dataframe. Mydf0
is yourdf
.
QUESTION
I am trying to work with two arrays in a certain way in python. Lets say
...ANSWER
Answered 2020-Jan-23 at 12:38Check this question Most efficient way to map function over numpy array
. You can create an array of indices np.arange(C.size)
, make a function with all the logic of combining A
, B
and C
element getting them by index and depending on the size of your arrays choose the fastest method to apply the function.
QUESTION
Everything works except the marked line. If the line is replaced by the commented one - it works. Any help?
...ANSWER
Answered 2017-Oct-06 at 10:15The issue is because you need to clear all the animations which have been queued up on the #eventwrap
element before you set the new bottom position in the #evclose
event handler. To do that you can use stop(true)
, like this:
QUESTION
I wonder how MATLAB works with vectorized operations?
...ANSWER
Answered 2017-Aug-19 at 12:57MATLAB uses JIT to speed-up computations. I've found no explicit info on JIT, only general suggestions. In my own use cases I prefer thinking of it as Java JIT, since optimization techniques match closely. MATLAB had done 4 major steps in improving performance:
- In R13 (2002) JIT was introduced
- In R2006b in-place computation without temp storage was introduced, see details on page 7 of the document
- In R2007a multithreading (in engine, not in Parallel toolbox) was introduced, in R2008 in was widely adopted
- In R2016 was introduced new engine with JIT widely adopted
For little more details pleasee see this blog post, the comments can be really useful. The main thing I got to know is that in newer releases "clean all" removes precompiled in the session code. Yair Altman tinkered JIT and wrote a perfect book on MATLAB performance. Some details on guts and usage of MATLAB JIT are available here. For introduction on performance I'd recommend to start with official manual
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