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QUESTION
So I was really ripping my hair out why two different sessions of R with the same data were producing wildly different times to complete the same task.
After a lot of restarting R, cleaning out all my variables, and really running a clean R, I found the issue: the new data structure provided by vroom
and readr
is, for some reason, super sluggish on my script. Of course the easiest thing to solve this is to convert your data into a tibble as soon as you load it in. Or is there some other explanation, like poor coding praxis in my functions that can explain the sluggish behavior? Or, is this a bug with recent updates of these packages? If so and if someone is more experienced with reporting bugs to tidyverse, then here is a repex
showing the behavior cause I feel that this is out of my ballpark.
ANSWER
Answered 2021-Jun-15 at 14:37This is the issue I had in mind. These problems have been known to happen with vroom, rather than with the spec_tbl_df
class, which does not really do much.
vroom
does all sorts of things to try and speed reading up; AFAIK mostly by lazy reading. That's how you get all those different components when comparing the two datasets.
With vroom:
QUESTION
I have a for loop doing something I would have thought relatively straight forward on Python 3
...ANSWER
Answered 2021-Jun-15 at 08:36If I understand correctly, you can't use pd.DataFrame.resample('5 min').mean()
out-of-the-box because time_5m
isn't at 'normal' positions past the hour (i.e. time_5m
is at 2:30, 7:30, ..., 57:30
past the hour.) That is, time_5m
is 2.5 minutes offset from the 'normal' positions past the hour (where the 'normal' positions are at 0, 5, 10, ..., 55
minutes past the hour).
Pandas version 1.1 introduced two new keyword arguments for resample()
: origin
and offset
(here are the docs for DataFrame.resample)
So something like this should work:
QUESTION
I have no trouble with Get-ChildItem
using * as a wildcard, but I wonder if it can be made to work with more refined wild cards. Given a file like C:\Folder\journal.0001.txt
I would want to use the wildcard C:\Folder\journal.####.txt
to get all "regular" journal files, but skip the ones named with this format journal.0000.worker1.log
. Using the wildcard in the path throws an error that the path doesn't exist, and replacing the file bit with a simple *
and the using journal.####.txt
as a filter or include doesn't work.
I do see that journal.????.txt
works, but that would potentially grab journal.ABCD.txt
should it exist. And I haven't even started playing with character sets.
ANSWER
Answered 2021-Jun-12 at 17:59Compared to RegEx wildcard patterns have a limited metacharacter set, and no quantifiers I know of, It does support character ranges like:
QUESTION
My script is:
...ANSWER
Answered 2021-Jun-08 at 21:04You're only updating the GUI for your local player. You'll need to iterate through all connected players, then update their GUI as well. https://developer.roblox.com/en-us/api-reference/function/Players/GetPlayers
QUESTION
I have a file with two fields separated with :
, both fields are varying length, second field can have all sort of characters(user input). I want the first field to be right padded with spaces to fixed length of 15 characters, for first field I have a working regex @.[A-Z0-9]{4,12}
.
sample:
...ANSWER
Answered 2021-Jun-05 at 10:32With perl
:
QUESTION
So I was writing a script that used random.randint()
in python, but it doesn't really matter since I think most mainstream languages have this "problem". It's like this: I set i
to a random number and then add a random number 1 million times and then divide it by two. The outputs vary wildly, sometimes it's close to 0, sometimes close to 1, but by logic the output should pretty much be 0.5
. What is causing this change.
ANSWER
Answered 2021-Jun-04 at 21:32QUESTION
Data frame dat
includes a set of numeric ids in a vector called code_num
. Some of these ids end with one or more zeros. Others do not. Here are the first three lines:
ANSWER
Answered 2021-Jun-03 at 22:25Try
QUESTION
I am using a Python POST request to geocode the addresses of my company's branches, but I'm getting wildly inaccurate results.
I looked at this answer, but the problem is that some results aren't being processed. My problem is different in that all of my results are inaccurate, even ones with Confidence="High"
. And I do have an enterprise account.
Here's the documentation that shows how to create a geocode Job and upload data:
https://docs.microsoft.com/en-us/bingmaps/spatial-data-services/geocode-dataflow-api/create-a-geocode-job-and-upload-data
here's a basic version of my code to upload:
...ANSWER
Answered 2021-Jun-02 at 15:28I see several issues in your request data:
- The "query" value you are passing in is a combination of a point of interest name and a location. Geocoders only work with addresses. So in this case the point of interest name is being dropped and only "Los Angeles" is being used by the geocoder, thus the result.
- You are mixing two different geocode query types into a single query. Either use just "query" or just the individual address parts (AddressLine, Locality, AdminDistrict, CountryRegion, PostalCode). In this case, the "query" value is being used an everything else in being ignored, using the individual address parts will be much more accurate than your query.
- You are passing in the full address into the AddressLine field. That should only be the street address (i.e. "8830 Slauson Ave").
Here is a modified version of the request that will likely return the information you are expecting:
QUESTION
I am currently using statsmodels (although I would also be happy to use Scikit) to create a linear regression. On this particular model I am finding that when adding more than one factor to the model, the OLS algorithm spits out wild coefficients. These coefficients are both extremely high and low, which seems to optimise the algorithm by averaging out. It results in all of the factors being statistically insignificant. I am just wondering if there is a way that I can put an upper or lower limit on the coefficients such that the OLS has to optimize within these new boundaries?
...ANSWER
Answered 2021-Jun-02 at 14:00I don't know if you can set a condition to OLS such that the absolute value of the coefficients are all less than a constant.
Regularization is a good alternative to this kind of problem though. Basically, L1 or L2 regularization penalize the sum of the coefficients in the optimization function, which pushes the coefficients of the least significant variables close to zero so they don't raise the value of the cost function.
Take a look at lasso, ridge and elastic net regression. They use L1, L2 and both forms of regularization respectively.
You can try the following in statsmodels:
QUESTION
I have array of Objects which is look like this
...ANSWER
Answered 2021-Jun-02 at 08:13Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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