dAISy | Simple AIS Receiver based on Si4362 and MSP430
kandi X-RAY | dAISy Summary
kandi X-RAY | dAISy Summary
dAISy (do AIS yourself) is a simple AIS receiver based on Silicon Labs [Si4362 EZRadioPro] receiver, Texas Instruments [MSP430G2553] MCU and [MSP-EXP430G2] v1.5 LaunchPad. The software was developed with Code Composer Studio 5.5. AIS, short for "Automatic Identification System", is a tracking system for ships. More on [Wikipedia] There are many websites dedicated to tracking ships based on this system, like for example [MarineTraffic] dAISy features: - integrated radio, no need for external radio with discriminator tap - hopping between channel A (161.975 MHz) and B (162.025 MHz) - receives, decodes and validates packets according to ITU-R M.1371-4 (NRZI decoding, bit-destuffing, CRC validation) - wraps valid packets into NMEA 0183 sentences (AIVDM) - sends NMEA sentences to PC via serial (9600 8N1). The output of dAISy can be processed and visualized by mapping and navigation programs like [OpenCPN] All content of this project is published under CC BY-NC-SA - [Creative Commons Attribution-NonCommercial-ShareAlike] A more detailed description of the project can be found in the [43oh.com forum] For those that just want the finished product: I sell the big sisters of dAISy in our [web store] ![dAISy AIS Receiver] Pictures/dAISyTindie.jpg).
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QUESTION
I want to move a value into a tuple-type enum variant and obtain a reference to the value after it has been moved. I see how this is possible with an if let statement, but this seems like this should be unnecessary when the particular variant is known statically.
Is there any way to get the reference to the moved value without requiring an if let or match?
This code block is a simple illustration of my question (see below for a more challenging case):
...ANSWER
Answered 2022-Mar-26 at 20:12If the variants have the same type you can implement AsRef and use the Transport as a &str:
QUESTION
I don't quite understand the base trick from Daisy Hollman's talk:
https://youtu.be/15etE6WcvBY?t=2670
Enumerating a pack using c++20 lamdas with explicit template arguments.
...ANSWER
Answered 2022-Mar-23 at 11:13This
QUESTION
I'm using hierarchical clustering for my data. And I'd like to plot the Silhouette score across different number of cluster. I have searched a lot posts, and I found that I need to use pam for the clustering in order to plot the Silhouette score. I'm wodering if there is a way to plot based on hierarchical clustering result?
Here is a sample data:
...ANSWER
Answered 2022-Mar-15 at 08:32hclust returns just a dendrogram representing clusters inside clusters. The silhouette score is defined on one specific clustering and not on all possible clusterings. This is why it works with Partitioning Arround Medoids (PAM) out of the box. In hierarchical clustering, however, one needs to decide first which clustering to chose by cutting dendrogram tree.
This is how to plot the silhouettes for a hierarchical clustering using k=5 clusters:
QUESTION
I am working with a pandas dataframe with multi-index columns (two levels). I need to drop a column from level 0 and later get a list of the remaining columns in level=0. Strangely, the dropping part works fine, but somehow the dropped column shows back up if you call df.columns.levels[0].
Here's a MRE. When I call df.columns the result is this:
MultiIndex([('Week2', 'Hours'), ('Week2', 'Sales')], )
Which sure looks like Week1 is gone. But if I call df.columns.levels[0].tolist()...
['Week1', 'Week2']
Here's the full code:
...ANSWER
Answered 2022-Feb-19 at 21:01Use remove_unused_levels:
From the documentation:
Unused level(s) means levels that are not expressed in the labels. The resulting MultiIndex will have the same outward appearance, meaning the same .values and ordering. It will also be .equals() to the original.
QUESTION
We've a table that contains an Id, and on the same row, a reference to another Id in the same table. The Id record was infected by the referenced Id record. The referenced Id itself may or may not have a reference to another Id, it may not exist, or it may become a circular reference (linking back upon itself). Put into pandas, the problem looks a bit like this:
...ANSWER
Answered 2022-Feb-03 at 14:38This is a graph problem, so you can use networkx.
Convert your dataframe to directed graph:
QUESTION
I am getting array like this in the typescript :
...ANSWER
Answered 2022-Jan-24 at 05:19You can try below code. if you are using angular then use *ngFor in html
QUESTION
I'm using the following data set to perform a cluster analysis on categorical data - link to data set - using the following packages in R:
...ANSWER
Answered 2022-Jan-11 at 17:18You may use maxsum=. Example:
QUESTION
I'm trying to extract all words with Uppercase initial letter from a text, with the REGEXEXTRACT formula in google sheets.
Ideally the first word of sentences should be ignored and only all subsequent words with first Uppercase letter should be extracted.
Other Close Questions and Formulas:I've found those other two questions and answers:
How to extract multiple names with capital letters in Google Sheets?
=ARRAYFORMULA(TRIM(IFERROR(REGEXREPLACE(IFERROR(REGEXEXTRACT(IFERROR(SPLIT(A2:A, CHAR(10))), "(.*) .*@")), "Mr. |Mrs. ", ""))))
Extract only ALLCAPS words with regex
=REGEXEXTRACT(A2, REPT(".* ([A-Z]{2,})", COUNTA(SPLIT(REGEXREPLACE(A2,"([A-Z]{2,})","$"),"$"))-1))
They are close but I can't apply them successfully to my project.
The Regex Pattern I Use:I also found this regex [A-ZÖ][a-zö]+ pattern that works well to get all the Uppercase first letter words.
The problem is that it's not ignoring the first words of sentences.
Other Python Solution Vs Google Sheets Formula:I've also found this python tutorial and script to do it:
...ANSWER
Answered 2022-Jan-05 at 10:55You can use
QUESTION
ANSWER
Answered 2021-Dec-27 at 23:25I resolved the issue. The main issue was that for film_category and film_actor, the primary was composite of foriegn keys(i.e film_id from film, category_id from category/ actor_id from actor). I had to change the definition for the repositories for both something like this
QUESTION
I have a few questions regarding the following scenario -
Consider this table (db<>fiddle here):
...ANSWER
Answered 2021-Sep-23 at 07:22update StudentClass set class =
CASE
WHEN class LIKE '%Math%' THEN replace(class, 'Math', '001')
WHEN class LIKE '%English%' THEN replace(class, 'English', '002')
WHEN class LIKE '%Art History%' THEN replace(class, 'Art History', '004')
WHEN class LIKE '%Art%' THEN replace(class, 'Art', '003')
ELSE '000'
END;
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