nak | The Nak Machine Learning Library | Machine Learning library
kandi X-RAY | nak Summary
kandi X-RAY | nak Summary
Nak is a Scala/Java library for machine learning and related tasks, with a focus on having an easy to use API for some standard algorithms. It is formed from Breeze, Liblinear Java, and Scalabha. It is currently undergoing a pretty massive evolution, so be prepared for quite big changes in the API for this and probably several future versions. We'd love to have some more contributors: if you are interested in helping out, please see the #helpwanted issues or suggest your own ideas.
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QUESTION
how to sort descending on Arraylist ? i don't know how to do it
my code ArrayList> data = new ArrayList>();
...ANSWER
Answered 2021-May-07 at 02:03You would do something like this:
QUESTION
First i am a lost noob
I have been recently trying to find out a way weather i can send serial data (large file like image data) only through the Rpi w 0's micro USB port using ttyGS0.but when i searched online i only found ways of setting up headless through serial and other stuff which was no what i wanted. But i did follow the tutorial half way
I went to '/boot/config.txt' and set 'dtoverlay=dwc2' at the end of the file after leaving a line
I went to '/boot/cmdline.txt' and did put 'modules-load=dwc2,g_serial' after 'rootwait' leaving a space
Thinking i could just use the /dev/ttyGS0 in my serial program on the Rpi and send the data the data was being sent but on my PC when i tried to access my Rpi which was on comport 12 it said port not found and couldn't open it.But it was showing up in the device manager as 'PI USB to Serial(COM12)'
Then i wondered weather it would be possible at all to access Rpi's comport this way.
If that's the case, i want to know if there is any other way to access the Rpi's USB port only using the USB cable
Note:-
- I don't want to use Rpi's USB as a way of loging ie. 'headless setup'.i just want to receive serial data like an arduino.
- I don't want to use the GPIO pins(i tried) as they can only send limited characters at a time and i want to send an image file. Very quickly.
- I don't have any serial converters at hand so i could route it to the arduino and use /dev/ttyUSB0 then read it on PC. I just only want to use the USB cable.
- In case this info is required:-
- my pc is a probook 6560b running windows 7
things i found while testing and stuff:-
- I did do -lsusb command but i dint find my device on that list
- I tried the 'ls /dev/ttyGS0' and i found '/dev/ttyGS0'
- I checked many forums and some guys were asiking to use this command 'dmesg | grep tty'and show them the code . So i performed it i dont understand what alot in the piece of text means but if it would be helpfull i pasted it here:-
ANSWER
Answered 2021-Mar-28 at 08:32Ok looks like i made some progress till now I did this
I went to '/boot/config.txt' and set 'dtoverlay=dwc2' at the end of the file after leaving a line
I went to '/boot/cmdline.txt' and did put 'modules-load=dwc2,g_serial' after 'rootwait' leaving a space
I did this 'sudo nano /etc/rc.local' and placed 'modeprobe g_serial use_acm=0' before 'exit 0'
Then i performed this command 'sudo systemctl stop getty@ttyGS0.service' and then this 'sudo systemctl disable getty@ttyGS0.service' (i think disabling getty@ttyGS0.service and puting 'modeprobe g_serial use_acm=0' in the folder metioned above allowed rpi and pc to comunicate but then again i can be wrong )
then perfored a 'sudo reboot'
this seemed to solve my problem
but i have one more problem now whatever is sent from the rpi i can only recieve in the coolterm serial port reading software i cant seem to use read the port from processing for some reason (im using processing to later read the image file being sent) here is my current serial reading program in processing
QUESTION
If I have a constrained link with a theoretical 3s of latency, 300kpbs speed and 400B MTU size for my data, how would I tune uftp given such constraints?
I have tried to use uftp specifying the transmit rate, block size using a fixed size with no congestion control:
...ANSWER
Answered 2021-Feb-22 at 19:57The filename(s) needs to be specified last after any options, otherwise the options are treated as additional files to send. This is typical for most Linux utilities where it is expected that the options are passed first. Because of this, it's sending at the default rate of 1000 Kbps.
So try using this command line:
QUESTION
I'm trying to test some probes connected via USB on an Linux device using Perl 5.28 and Linux (Debian 8). When I read out a large file buffer of the probe, often none readable ASCII signs occur like \0
or \x02
. I want to translate these signs into readable tagged text. I've written a small subroutine, but it seems to me a little bit clunky for large translation list to test every entry. Is there a better way to do that?
Example script
...ANSWER
Answered 2021-Feb-20 at 12:16Use a table.
Setup:
QUESTION
I'm trying to receive stock data for about 1000 stocks, to speed up the process I'm using multiprocessing, unfortunately due to the large amount of stock data I'm trying to receive python as a whole just crashes.
Is there a way to use multiprocessing without python crashing, I understand it would still take some time to do all of the 1000 stocks, but all I need is to do this process as fast as possible.
...ANSWER
Answered 2021-Jan-31 at 19:18Ok, here is one way to obtain what you want in about 2min. Some tickers are bad, that's why it crashes.
Here's the code. I use joblib for threading or multiprocess since it doesn't work in my env. But, that's the spirit.
QUESTION
I'm trying to make a 8 KB replay buffer in Verilog, and when setting up the test-bench and running it, I get undefined states for the output, a high impedance for the ready
, and undefined output for the data, as well as an undefined sequence variable. I'm not exactly sure as to how to get the test-bench to display the correct results. I've tried assigning data for the sequence variable, but nothing seems to be working.
My waveform is like this (https://imgur.com/a/hNt1bXU). My reg variables are initialized, and I'm not sure what the issue is in order to get a proper output for the waveform.
Replay Buffer
...ANSWER
Answered 2020-Nov-29 at 13:29When I compile your code, I get several warnings. This is the 1st:
QUESTION
After Executing This code i am getting error win not found running tkinter from different function is important as its a homework
Code:
...ANSWER
Answered 2020-Oct-14 at 17:08This is a very weird way on using tkinter, anyway who am I to judge. exec()
takes a globals()
argument to make the declaration global
. This is how the exec should look like:
QUESTION
I'm using Python 3.7.9. I'm trying to use scapy by adapting the code found in this link (for the credits):
https://cabeggar.github.io/2016/02/21/DHCP-starvation-with-ScaPy/
...ANSWER
Answered 2020-Aug-23 at 23:06First of all I'm slightly skeptical that
QUESTION
In the GraphQL API, I often see naming conventions such as NQ and MQ as parameters used in cursor. This is an example, shown below,
...ANSWER
Answered 2020-Aug-03 at 17:24The Relay Server Specification defines how pagination should be done in order to be compatible with the Relay GraphQL Client. While it is not the only way how pagination can be done, it has evolved as a standard - at least in examples, since it can be easily referenced.
The section on connections gives more info about how cursors work:
Each edge gets a cursor value. This value is - what they call - an opaque value, meaning it should not be interpreted by the server. It is a reference/a pointer that only the server can interpret. So, if you have a query that gets a bunch of values:
QUESTION
After I scraped for the links, I got to the next page but scrapy is not showing the results expected. I think it might be a Xpath problem but when I use scrapy shell it seems to work just fine.
Here is the code:
...ANSWER
Answered 2020-Jul-26 at 06:44As a general rule I always do a test run of the websites I want to scrape in scrapy. That means I use requests to make a simple HTTP get request. If i'm getting a status code error then it's easy to see, if I get the status code I want, I see if I can get the HTML I need.
Information on WebsiteFirst url
https://seekingalpha.com/market-news/on-the-move
requires headers to access the data, status code 403 when you do a simple HTTP request.Second url h
ttps://seekingalpha.com/news/3594751-amd-swir-among-premarket-gainers
requires javascript. So if I get a status code from the requests package, the next step does it have the HTML I need? In this case it didn't. I then will proceed to disable javascript, and you can see in this case, despite how simple the page is, it is entirely javascript.
So those are the two challenges with the website. The first is easy to get around, you can grab the headers by navigating to the network tools of chrome or any other browser. Look for the document request and grab the headers.
The second challenge I was unable to find a useful HTTP request, so indeed using splash was needed.
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