kandi X-RAY | instruments Summary
kandi X-RAY | instruments Summary
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of instruments
instruments Key Features
instruments Examples and Code Snippets
def _determine_and_instrument_traced_tensors(self, graph_order,
ops_in_exec_path,
tensor_trace_points,
report
Community Discussions
Trending Discussions on instruments
QUESTION
I'm looking into using QuestDB for a large amount of financial trade data.
I have read and understood https://questdb.io/docs/guides/importing-data but my case is slightly different.
- I have trade data for multiple instruments.
- For each instrument, the microsecond-timestamped data spans several years.
- The data for each instrument is in a separate CSV file.
My main use case is to query for globally time-ordered sequences of trades for arbitrary subsets of instruments. For clarity, the results of a query would look like
...ANSWER
Answered 2021-Jun-13 at 22:11As of 6.0 you can simply append the CSVs to same table one by one given the table has designated timestamp and partitioned it will work.
If your CSVs are huge I think batching them in transactions with few million rows will be better than offloading billions at once.
Depending of how much data you have and your box memory you need to partition in a way that single partition fits memory several times. So you choose if you want daily or monthly partitions.
Once you decide with partitioning you can speed up the upload if you able to upload day by day batches (or month by month) from all CSVs.
You will not need to rebuild the table every time you add an instrument, table will be rewritten automatically partition by partition when you insert records out of order.
QUESTION
I am having trouble matching a string literal in start-pattern
in a custom instrument (see WWDC 2018 video Creating Custom Instruments) in Xcode’s Instruments.
For example, this start-pattern
works ...
ANSWER
Answered 2021-Jun-12 at 21:43If you use string literals in the start-pattern
, you must use printf-style
format string.
Thus, this will not work:
QUESTION
I'm coding a complex chart in SwiftUI that the user can scroll horizontally to see past data points.
The chart holds quite a few subviews inside so I would like to debug performance while scrolling.
Can anyone tell me how can I visualize current FPS (frames per second) when debugging my SwiftUI app. I've tried Instruments but can't seem to find anything related to displaying fps with SwiftUI.
Can anyone point me in the right direction? Thanks!
...ANSWER
Answered 2021-Jun-11 at 07:31Since SwiftUI uses Core Animation for rendering, you can measure the FPS by profiling and using 'Core Animation FPS' instrument.
Other than that, you can check out here for a great tutorial about the SwiftUI specific Instrument, for identifiying slow layouts.
Make sure you are using a real device for that, because Core Animation FPS Instrument will not work with a simulator.
QUESTION
I wrote an aspect library that auto-instruments traces and because most of the developers using this have multi-module projects, it would be nice if they could just configure the aspectj-maven-plugin for compile-time weaving in the parent pom.xml instead of each module's pom.xml. The problem is that not all modules require certain weave dependencies and as such I would like it if the plugin could ignore those missing dependencies when weaving those modules instead of failing the build. Is this even possible?
...ANSWER
Answered 2021-Jun-03 at 08:11Configure plugin version and common settings in the parent's pluginManagement
section, then simply add the plugin group ID and name to each module's plugins
section where it is needed, optionally amending or changing the configuration. Adding a plugin to the parent POM even though not all modules use it, is simply wrong from a Maven perspective.
QUESTION
I'm using the robinhood.options.get_option_market_data API from the robin_stocks library to read information about stock options into my Python 3 program.
The documentation for this API indicates it returns a dictionary of key/value pairs
robin_stocks.robinhood.options.get_option_market_data_by_id(id,info=None)
Returns the option market data for a stock, including the greeks, open interest, change of profit, and adjusted mark price.Parameters•id(str) – The id of the stock.•info(Optional[str]) – Will filter the results to get a specific value. Returns a dictionary of key/value pairs for the stock. If info parameter is provided, the value of the key that matches info is extracted. Complete Docs - https://readthedocs.org/projects/robin-stocks/downloads/pdf/latest/
I use the following code to retrieve information about this particular option.
...ANSWER
Answered 2021-May-31 at 01:59It is returning a list of a list with a dictionary in it, albeit it is a list of a list with only one value and then one value, at least from the sample you provided in the comments.
QUESTION
I'm learning Python and it has gone relatively well so far. However I have run into an obstacle.
I have a CSV file (336 rows and 2657 columns) which contains daily data of spot rates of different instruments of different maturities:
I also have a function called importdata
, which imports the data for one instrument, say all the 3M USD, at one one date, say on 03/09/2021 (m/d/y). name is the instrument (so 3M USD):
ANSWER
Answered 2021-Mar-30 at 17:27You can iterate over the rows of a DataFrame using iterrows().
QUESTION
Im working on geological datasets and am trying to smooth the data distribution to improve the machine learning algorithms.
I need to calculate the error on certain values by using half of their last decimal, just like most measuring instruments recommend.
Here are some examples of what I would like to obtain from certain numbers:
...ANSWER
Answered 2021-May-20 at 20:27Convert the value to a string.
Count the zeros and use '0.' + num_zeros * '0' + '5'
to get the new number as a string.
Convert the string to a float.
QUESTION
I am trying to figure out if it is possible to add effects to a new track in the sequencer just like you would with a instrument.
So far I haven’t been able to figure it out based on the docs, but the idea is to be able to sequence parameters for a selected effect just like you would with midi note information such as velocity, length and pitch/note for AudioKit instruments. Say if you wanted to sequence a low pass filter; you would have access to sequence the cutoff frequency and resonance etc.
Any ideas if this is achievable with AudioKit?
Thanks in advance.
...ANSWER
Answered 2021-May-19 at 18:25You could represent the parameter changes you want to sequence inside MIDI events, add those events to a sequencer track, add the track to a sequencer and connect the sequencer track to a callback instrument. The callback instrument would change the low pass filter's parameters.
So the outline of the process would be:
SequencerTrack -> Callback instrument -> Low pass filter's parameters
It might not be an ideal solution because you would be calling a Swift function from the DSP and back into the DSP from Swift, but it's the only solution that comes to mind without writing your own custom DSP code.
QUESTION
I get my data from an API with :
...ANSWER
Answered 2021-May-18 at 05:23You're using .filter
on undefined variable: "Cannot read property 'filter' of undefined".
The issue comes from the way you use the Axios response and not the function you give to the .filter
method.
As mentionned in the Axios documentation, you can retrieve response data in the data
property from the response:
When using then, you will receive the response as follows:
QUESTION
I am trying to fill bootstrap cards with data from a database. I am very close. I have the mainphp file called project.php
A file with a function called component to fill them, called component.php.
And a connectDB.php file, that connect the DB and extracts the information from a table.
I am aware this is alot of code so I highlighted 2 areas the problem is definitely in...Apologies if too much, I can remove the function if necessary as it works..
here is an extract from project.php
...ANSWER
Answered 2021-May-12 at 17:50You have a function getData() that has "$this->table". Dont copy paste the codes without understnading what it does... Clean up your connectDB.php
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