harold | An open-source systems and controls toolbox for Python3
kandi X-RAY | harold Summary
kandi X-RAY | harold Summary
An open-source systems and controls toolbox for Python3
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Top functions reviewed by kandi - BETA
- The DC gain
- Convert to numpy array
- Return the DC gain
- Calculate cancellation distance
- Computes the minimization state of a matrix
- Generate eigenvalue matrix
- Return the properties of the pole
- Compute the properties of the pole
- Write the version py file
- Return the git version number
- Get the full version information
- Set the transfer function
- R Convert a tensor to a given state
- Recalculate pole and zeros
- Sets whether the pole is stable
- Set transfer function
- Return the full version information
- Set the C
- Recalculate the poles
- Check if poles are stable
- Setter
- Set the D
- Set the b
harold Key Features
harold Examples and Code Snippets
Community Discussions
Trending Discussions on harold
QUESTION
I have something like this:
...ANSWER
Answered 2021-Jun-14 at 19:30You could spread the object and add another name for all object.
This method does not mutate the given data.
QUESTION
I use an online music player called "Netease Cloud Music", and I have multiple playlists in my account, they hold thousands of tracks and are very poorly organized and categorized and held duplicate entries, so I want to export them into an SQL table to organize them.
I have found a way to view the playlists without using the client software, that is, clicking the share button on top of the playlist page and then click "copy link".
But opening the link in any browser other than the client, the playlist will be limited to 1000 tracks.
But I have found a way to overcome it, I installed Tampermonkey and then installed this script.
Now I can view full playlists in a browser.
This is a sample playlist.
The playlists look like this:
The first column holds the songtitle, the second column holds the duration, the third column holds the artist, and the last column holds the album.
The text in the first, third and fourth columns are hyperlinks to the song, artist and album pages respectively.
I don't know a thing about html but I managed to get its data structure.
The thing we need is the table located at xpath //table/tbody
, each row is a childnode of the table named tr(xpath //table/tbody/tr
).
this is a sample row:
...ANSWER
Answered 2021-Jun-07 at 07:39The simplest answer is that you have to add some delay after opening the page with Firefox.get('https://music.163.com/#/playlist?id=158624364&userid=126762751')
before getting the elements with Firefox.find_elements_by_xpath('//table/tbody/tr')
to let the elements on the page loaded. It takes few moments.
So, you can simply add a kind of time.sleep(5)
there.
The better approach is to use expected conditions instead.
Something like this:
QUESTION
I am trying to learn Common Lisp with the book Common Lisp: A gentle introduction to Symbolic Computation. In addition, I am using SBCL, Emacs, and Slime.
In the middle of chapter 8, the author presents recursion on trees. He showcases this concept with a function on trees that inserts the symbol 'q
in all non-list elements of the tree:
I did the same in my environment:
...ANSWER
Answered 2021-May-30 at 18:51Unfortunately, while coping and yaking I forgot to change the recursive calls on atoms-to-q-no-null
. I realized this error while preparing this question for stackoverflow.
Since I had already written some part of the question, I thought it would be better to answer it and make the effort useful for other people.
After fixing the recursive calls of the function:
QUESTION
I need to convert a double array in c# to an IntPtr to properly send it to my c DLL. I have successfully been able to convert from IntPtr to double[,] using the method from this answer. Ive also found another answer that is close to what I need but deals with 1D arrays.
Im missing something in my logic and get the error code after a crash: Managed ' has exited with code -1073740940 (0xc0000374).
This is what I have so far
...ANSWER
Answered 2021-Mar-11 at 15:52There are various things wrong with that.
First, rows * columns
is not the size of the data, it's only the total number of elements. The elements are not one byte each, but eight, or sizeof(double)
if you prefer.
Second, p
is updated by p = (IntPtr)(p.ToInt64() + IntPtr.Size);
(ie advancing it by 4 or 8 bytes depending on how big pointers are in the current mode), but you've written columns * 8
(or, columns * sizeof(double)
) bytes of data. Advancing p
by less than columns * 8
makes the writes overwrite each other, so not all data ends up in the result. By the way, the complicated conversions here are actually not necessary, you can add directly to an IntPtr
, since .NET 4.
Third, p
is changed in the loop, which is not bad on its own, but it's done in a way that loses track of the original pointer. toReturn.cells = p;
and Marshal.FreeHGlobal(p);
use a p
which does not refer to the area that you allocated, they use a p
which now points just past the end of the data (well it would point there if p
was updated by the right amount). The original p
must be remembered.
Fourth, freeing the data before returning means that it now no longer exists, so whatever code this data is passed to, still doesn't have it: it has a pointer to nothing which will be invalid to use (it may accidentally work, but it's dangerous and wrong).
The first three points are easy to fix, but the last one needs a non-local change to how your application works: the memory cannot be freed here, but it should be freed at some point, namely when the user of the data is done with it.
Some fixes applied:
QUESTION
I wanted to group number of ids that are of length of 4, 5, 6 bytes based on the year.
ID year name location geo new_loc addr 1 addr 2 addr 3 addr 4 12345 2019 bob UK UK-4 basic dat1 dat11 dat13 dat123 19804 2004 sam US US-1 advanced dat2 dat21 dat23 dat233 19 2000 lister EU EU basic dat3 dat31 dat33 dat333 190838 2004 harold US US-3 basic dat4 dat41 dat53 dat533 11804 2019 beanie SK UK-2 advanced NULL NULL NULL NULLOutput
ID year name location new location num_of_ids_each_year 12345 2019 bob UK basic 2 11804 2019 beanie SK advanced 2 19804 2004 sam US advanced 2 190838 2004 harold US basic 2What I tried:
...ANSWER
Answered 2021-Mar-10 at 08:42You can use COUNT()
with Partition by Year
to get the results without using GROUP BY
.
QUESTION
Hello I need help with this program I have been doing, this is a program which will ask the user trivia questions and then count the users IQ, I managed to make the program ask the user the questions and then add a 1 to the list that is named 'IQ' when the user answers the question correctly, I then had the computer count how many ones there are in the list to check the score that the user got.
I then the next day tried to make it so that the program would make you input the answer again if you didn't input one of the specified answers and output a message asking to input your answer again.
I am fairly new to programming so any help or criticism would be appreciated.
...ANSWER
Answered 2021-Feb-01 at 14:09You can Do something like this -
QUESTION
I have a dataset for credit card transaction.
I split this dataset by group using below code
...ANSWER
Answered 2020-Dec-20 at 03:28- See inline notation for code explanation
pandas.core.groupby.GroupBy.size
pandas.Series.reset_index
pandas.Series.quantile
pandas.cut
pandas.DataFrame.merge
pathlib
pandas.DataFrame.iloc
pandas.DataFrame.to_csv
QUESTION
I'm writing a program that will simulate a randomized race between runners who are climbing up a mountain where dwarf orcs (dorcs) are coming down the mountain to attack the runners. It begins with two runners named harold and timmy at the bottom of the mountain. The runners make their way up the mountain in randomized moves where they may make progress forward up the mountain, or they may slide back down the mountain. Dorcs are randomly generated, and they inflict damage on a runner if they collide. The simulation ends when one of the runners reaches the top of the mountain, or when both runners are dead.
I'm struggling with a part where I have to implement the actual race loop. Once the race is initialized, the race loop will iterate until the race is over. This happens when either a winner has been declared, or when all runners are dead.
Every iteration of the race loop will do the following:
with 30% probability, dynamically allocate a new dorc as an EntityType structure, and initialize it as follows:
(a) a dorc’s avatar is always “d”
(b) each dorc begins the race at the top of the mountain, which is at row 2
(c) with equal probability, the dorc may be placed either in the same column as timmy, or in the same column as the harold, or in the column exactly half-way between the two
(d) add the new dorc to the race’s array of dorcs
(e) using the pthread_create() function, create a thread for the new dorc, and save the thread pointer in the dorc’s entity structure; the function that each dorc thread will execute is the void* goDorc(void*) function that you will implement in a later step; the parameter to the goDorc() function will be the EntityType pointer that corresponds to that dorc
I guess I'm confused with the logic of how to approach this. I decided to make a function called isOver() to indicate if the race is over, and then a separate function called addDorc() to initialize the Dorc elements and do all the requirements above.
In isOver(), I attempt to add a dorc object to the dorcs array by doing addDorc(race);
with every iteration of the race loop/if the race hasn't ended or no one died. But I keep getting the error:
ANSWER
Answered 2020-Nov-25 at 01:01Caveat: Because there's so much missing [unwritten] code, this isn't a complete solution.
But, I notice at least two bugs: the isOver
bugs in my top comments. And, incrementing race->numRunners
in addDorc
.
isOver
also has the return 0;
misplaced [inside the loop]. That should go as the last statement in the function. If you had compiled with -Wall
[which you should always do], that should have been flagged by the compiler (e.g. control reaches end of non-void function
)
From that, only one "dorc" would get created (for the first eligible runner). That may be what you want, but [AFAICT] you want to try to create more dorcs (one more for each valid runner).
Also, the bug the compiler flagged is because you're calling addDorc(race);
but addDorc
takes more arguments.
It's very difficult to follow the code when you're doing (e.g.) race->dorcs[race->numDorcs]->whatever
everywhere.
Better to do (e.g.):
QUESTION
Normally I would use a CSS page, but i don't think i can do that with canvas :(
...ANSWER
Answered 2020-Nov-11 at 09:19This is an example using flexbox
. Wrap your divas in a container
and give it a display: flex
.
QUESTION
I'm relatively new to python, and am a bit confused with finding an int max/min value with a sublist. Example below
Firstly, the data set im using is a list with lists as elements. It looks like - [[John, Smith, 15], [Yu, Harold, 16]] etc.. Im having trouble getting just the INT as the max or min value from the list. I have tried the following
...ANSWER
Answered 2020-Oct-27 at 17:34Since you want the entire sub list with the max value, use a key function with max
:
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Install harold
You can use harold like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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