signal | tutorial assumes a basic knowledge
kandi X-RAY | signal Summary
kandi X-RAY | signal Summary
This tutorial assumes a basic knowledge of RxJS and functional reactive programming. You can start with:. Let's explore the idea of a Signal Graph by building something we use all the time: a login form. A login form will need an entry for your credentials and a way to submit. You probably want to display feedback from the server about incorrect logins, and maybe you also want to disable clicking submit while a login is in progress. So how do we model this with observables? We'll let's start with what we have - three streams of data from user inputs. We can track every thing the user types in each text field, and we can track clicking on a submit button. From there, we can probably come up with a stream of attempted logins by combining the username and password every time the user clicks the submit button. We can use those to kick off API calls to a server, which will eventually result a stream of responses. From there we can derive more things -- we can seperate successes and failures from the response stream, and we can derive whether a login is progress from the time between a login attempt and a login response. We can extract useful data from our success and failure streams -- the error messages returned from the server and maybe an auth token that comes back in a success login response. And finally later on we can use the auth token stream to trigger a fetch of a protected resource since the next screen after a login is usually to display some personalized data. We've built up a series of streams, starting from our primary signals which are our user inputs. The network of these connected observables is called a signal graph. The signals are the emissions from observables, and the graph is how they're all tied together. This is how we can architect programs with Observables. Our programs become a series of reactive data streams, starting with primary signals and extending to all the derivations based on those primary signals. Taken together, those form a signal graph. Signal graphs are a concept. Your observables together form a signal graph whether or not you use this library. However, using this library to directly define your signal graph will help you think about your design, and solve a number of potential pitfalls you're likely to encounter writing production code with observables.
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Lines of Code : 175License : Non-SPDX (Apache License 2.0)
Copydef frame(signal, frame_length, frame_step, pad_end=False, pad_value=0, axis=-1,
name=None):
"""Expands `signal`'s `axis` dimension into frames of `frame_length`.
Slides a window of size `frame_length` over `signal`'s `axis` dimension
License : No LicenseCopydef fake_signal():
signals = get_signals()
# assume all signals are same length
signals = np.array(signals)
hmm = HMM(5, 3, signals[0].shape[1]) # M, K, D
hmm.init_random(signals)
init = tf.global_variables_initializer()
def _infer_frame_shape(signal, frame_length, frame_step, pad_end, axis):
"""Infers the shape of the return value of `frame`."""
frame_length = tensor_util.constant_value(frame_length)
frame_step = tensor_util.constant_value(frame_step)
axis = Community Discussions
Trending Discussions on signal
QUESTION
Here's my csv file CSV
I'm trying to take the mean of columns "Angle Min" and "Angle Max" and then multiply every row in the resulting dataframe with the "Angle Conversion Factor" in cell D8. Likewise I want to do the same with "Torque Min" and "Torque Max" (get the mean and then multiply the resulting dataframe by the "Torque Conversion Factor" in Cell E8).
Here's my code so far:
...ANSWER
Answered 2021-Jun-15 at 21:54Your AngleConcFactor and TorqueConvFactor remain as 1x1 DataFrames in your code.
Just a slight cleanup of your function might give you what you need:
QUESTION
In my iOS app "Progression" there is rarely a crash (1 crash in ~1000+ Sessions) I am currently not able to fix. The message is
Progression: protocol witness for TrainingSetSessionManager.update(object:weight:reps:) in conformance TrainingSetSessionDataManager + 40
This crash points me to the following method:
...ANSWER
Answered 2021-Jun-15 at 13:26While editing my initial question to add more context as Jay proposed I think it found the issue.
What probably happens? The view where the crash is, contains a table view. Each cell will be configured before being presented. I use a flag which holds the information, if the amount of weight for this cell (it is a strength workout app) has been initially set or is a change. When prepareForReuse is being called, this flag has not been reset. And that now means scrolling through the table view triggers a DB write for each reused cell, that leads to unnecessary writes to the db. Unnecessary, because the exact same number is already saved in the db.
My speculation: Scrolling fast could maybe lead to a race condition (I have read something about that issue with realm) and that maybe causes this weird crash, because there are multiple single writes initiated in a short time.
Solution: I now reset the flag on prepareForReuse to its initial value to prevent this misbehaviour.
The crash only happens when the cell is set up and the described behaviour happens. Therefor I'm quite confident I fixed the issue finally. Let's see. -- I was not able to reproduce the issue, but it also only happens pretty rare.
QUESTION
I don't have much knowledge on system verilog and I have the following question.
As I know, if an edge of a reset signal has been triggered in the sensitivity list of an always block then the reset type of that reset signal is 'asynchronous' I need to know, what is the reset type of the reset signal of an always_latch?
...ANSWER
Answered 2021-Jun-15 at 06:39Both resets are asynchronous. You cannot have a synchronous reset in a latch because there is no clock. The always_latch construct in your example creates an implicit sensitivity list
QUESTION
I want to create an entry on UserExtended model after registering an user on Django default user model.
here is UserExtended model:
...ANSWER
Answered 2021-Jun-14 at 15:45Django does not look for any file named signal.py, etc. by default. Hence what is happening it that your signals are never registered (in fact the file you write them in is never run). The general solution to adding signals is to write them in a separate file and then import / register them in the app config's ready method.
In the app in which you write signal.py there should be a file apps.py in which there should be a class inheriting from AppConfig edit this class and add a ready method to it and import your signals there:
QUESTION
I am creating multiple object of type QWidget_WindowContact at runtime. When I click the Increment or decrement buttons the value in the last generated object gets updated and not the value in the same object.
I am struggling to properly link the signals and slots, so that when multiple objects of the same type are generated at runtime the signal emitted by the button coressponds to the signal in the right object.
QWidget_WindowContact.h:
...ANSWER
Answered 2021-Jun-11 at 14:30You have
QUESTION
I am new to Spark and am trying to run on a hadoop cluster a simple spark jar file built through maven in intellij. But I am getting classnotfoundexception in all the ways I tried to submit the application through spark-submit.
My pom.xml:
...ANSWER
Answered 2021-Jun-14 at 09:36You need to add scala-compiler configuration to your pom.xml. The problem is without that there is nothing to compile your SparkTrans.scala file into java classes.
Add:
QUESTION
I'd like to send a beacon signal from my mobile web browser. Is there a way to broadcast BLE in a browser? I checked the non-standard Bluetooth API, but there was no such function.
Thank you for reading it.
...ANSWER
Answered 2021-Jun-14 at 06:31Unfortunately there doesn't seem to be support for this yet. There's an open request for this feature as can be seen here:-
- https://bugs.chromium.org/p/chromium/issues/detail?id=1043409
- https://github.com/WebBluetoothCG/web-bluetooth/issues/231
More information about web bluetooth support is found here:-
QUESTION
The purpose of this code is to:
- create a dummy data set.
- Then turn it into a data frame
- Calculate the peaks and make it a column in the data frame
- Calculate the troughs and make it a column in the data frame
- Filling the “nan” values with “hold”
- Replace all the float values with the word “buy”
The problem is with last step is that it is never worked, but there is no error, it is just print the dataframe just like before this couple of lines.
Here is the code:
...ANSWER
Answered 2021-May-22 at 16:01Use np.where to classify it
QUESTION
I am currently encountered two connecting ways in qt.
...ANSWER
Answered 2021-Jun-14 at 02:02SIGNAL means the string representation of the function and &QAction::triggered is a function pointer. SIGNAL is the old way of doing things and slow due to string comparison at run time.
The following line of code will resolve to a connect which uses string comparison of signal and slot.
QUESTION
Just getting started with Pine Script and coding in general. I found a couple open source scripts that was able to signal a buy when there is an engulfing bullish candle. Is there a way to code it so that there has to first be 3 bearish candles and then a bullish candle to signal the buy? Image 1 shows what I am wanting with 3 red candles then signal a buy. Image 2 shows that there was only 1 red candle and then there was a bullish candle that signaled a buy.
![1]: https://i.stack.imgur.com/vepsW.png ![2]: https://i.stack.imgur.com/uwMMI.png
...ANSWER
Answered 2021-Jun-14 at 01:57threeRed = close[1] < open[1] and close[2] < open[2] and close[3] < open[3]
oneRed = close[1] < open[1]
bullishEng = close > open and close > max(open[1], close[1])
buySignal1 = oneRed and bullishEng and not threeRed
buySignal3 = threeRed and bullishEng
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