tibbletime | Time-aware tibbles | Time Series Database library
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Time-aware tibbles
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QUESTION
I need to create a running sequential number for every row in a group. The groups are both the artist IDs and also the course number. The course number is also a sequential running number created based off of a very specific criteria: If an artist goes more than 7 days in between recording, a new course number is created.
For example, let's say that we have an artist_id whose data looks like this:
artist_id session_number_total CustomerRecordId SiteRecordId recording_date control_panel year 1 1 3 3 1/1/2000 Left 2000 1 2 3 3 1/3/2000 Right 2000 1 3 3 3 1/8/2000 Right 2000 1 4 3 3 5/1/2000 Left 2000This artist_id came in for a session on 1/1/2000, 1/3/2000, 1/8/2000, and 5/1/2000. Based off of the aforementioned criteria for creating the course number groups (no more than 7 days in between recording dates) while also adding in the running count of the number of sessions for that artist, the final dataset should look like this:
artist_id session_number_total CustomerRecordId SiteRecordId recording_date control_panel year days_between Status course_number session_in_course 1 1 3 3 1/1/2000 Left 2000 0 Existing Course 1 1 1 2 3 3 1/3/2000 Right 2000 2 Existing Course 1 2 1 3 3 3 1/8/2000 Right 2000 5 Existing Course 1 3 1 4 3 3 5/1/2000 Left 2000 114 New Course 2 1I am able to achieve this using some very convoluted code with dplyr. It works every time but the problem is that with 2.5 million rows in my dataset, the code can take 20-30 minutes to run each time I open a new session in R.
Considering how great data.table is for large sets of data, I'm wondering if anyone knows a data.table solution for creating the sequential group numbers and the running session count inside each of the groups based off of the criteria mentioned above? Any help would be appreciated so thank you in advance.
Here is a reproducible dataset and the code I used in dplyr to accomplish creating the final dataset:
...ANSWER
Answered 2021-May-08 at 17:15How about this data.table
solution:
QUESTION
I'm having issues with filtering my dataset into a specific date. I'm not sure how to upload the dataset on here but here is the link for it https://sexualitics.github.io . I'm trying to explore porn trends over the years focusing on 2007 first then 2008, 2009 etc. However, nothing has worked from what I have tried.
...ANSWER
Answered 2021-Mar-24 at 22:50There are several places you can find out how to solve this.
One example: https://www.gormanalysis.com/blog/dates-and-times-in-r-without-losing-your-sanity/
But i understand you are new to R, and get stuck at small errors. I think your error is in formating the date. You need to help R to interpret the text.
Try this:
QUESTION
Problem
I have data in four columns (ID), The date a test was done (TestDT) a column with the numerical result of a test of interest (Test1) and another column with a numerical result of a different test of interest (Test2).
...ANSWER
Answered 2021-Mar-06 at 17:36data.table
has foverlaps
function that merges two datasets on the date ranges.
You will need to split your data into test1 and test2 and do something like this:
QUESTION
I could have sworn this code worked a week ago, but I guess that I am mistaken. I keep getting the error: Error: Can't subset columns that don't exist.
x Column asset
doesn't exist.
Run rlang::last_error()
to see where the error occurred.
In addition: Warning message:
...
must not be empty for ungrouped data frames.
Did you want data = everything()
?
I've taken it step by step to try and see where it is in my code and I can tell that it is after I group the assets, and occurs when I start to add on the tq_transmute. If someone could please help that would be greatly appreciated. I will have code that you should be able to just run automatically and see what I am talking about. It doesn't make any sense because "asset" does exist after gathering the data and grouping it.
...ANSWER
Answered 2021-Jan-14 at 05:46gather
has been replaced with pivot_longer
and spread
with pivot_wider
. If you change gather
code to pivot_longer
it works. I am not exactly sure why it fails with gather
though.
QUESTION
I am using the R programming language. I am following this tutorial over here: https://blogs.rstudio.com/ai/posts/2018-06-25-sunspots-lstm/
I am trying to prepare my data in the same way as this example over here:
...ANSWER
Answered 2020-Dec-28 at 07:34Make your index
column such that it can be converted to date object.
QUESTION
I'm trying to calculate a rolling sum based on the following toydata:
...ANSWER
Answered 2020-Nov-10 at 03:26Here is an option using data.table::frollmean
:
QUESTION
I have a tibble called master_table
that is 488 rows by 9 variables. The two relevant variables to the problem are wrestler_name
and reign_begin
. There are multiple repeats of certain wrestler_name
values. I want to reduce the rows to only be one instance of each unique wrestler_name
value, decided by the earliest reign_begin
date value. Sample tibble is linked below:
So, in this slice of the tibble, the end goal would be to have just five rows instead of eleven, and the single Ric Flair row, for example, would have a reign_begin date of 9/17/1981, the earliest of the four Ric Flair reign_begin
values.
I thought that group_by
would make the most sense, but the more I think about it and try to use it, the more I think it might not be the right path. Here are some things I tried:
ANSWER
Answered 2020-Jul-15 at 20:57The common way to do this for databases involves a join:
QUESTION
I am new to packages dplyr and tibbletime and have the following objective. I need to sum the quantities of trades (qty in a dataset) that occur in the same interval of 24 hours. For instance, I have 3 trades within 1 hour with 300, 200 and 100 quantities respectively and I want them to be summed up to 600 and in the same fashion for all trades within one hour for the whole trading day. I tried the following:
...ANSWER
Answered 2020-Jun-14 at 15:22QUESTION
I built this code to check the correlation between Bitcoin and other altCoins, the table data is working fine, my only issue is when I try to plot the result to get a visual representation, I get the below result:
...ANSWER
Answered 2020-Mar-28 at 05:50You need backticks around the variable name.
QUESTION
I am trying to build a code appendix using the instructions from Yihui's site below:
https://bookdown.org/yihui/rmarkdown-cookbook/code-appendix.html
The issues is that I get no results, nothing happens when I preview the code in RStudio. One thing that I noticed is that code knitr::all_labels()
returns NULL
even though I have named all 30+ chunks in my Rnotebook. Also, I was able to build a external file with purl
which is the last line. I tried to build a reprex with a basic starter Rnotebook, but the reprex didn't build in RStudio so I am going to paste what tried.
Thank you!
The Code...sorry, I had to remove the back ticks so that I could paste all the code chunks together.
...ANSWER
Answered 2020-Mar-21 at 20:17knitr::all_labels()
returns NULL
if it is not called in the full knitting process. When you run a single code chunk in the R Markdown Notebook, the document is not fully knitted.
To make knitr::all_labels()
return all chunk labels, you should not use the notebook mode or preview the notebook, but knit the document instead (e.g., to the html_document
output format).
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Install tibbletime
filter_time() - Succinctly filter a tbl_time object by date.
as_period() - Convert a tbl_time object from daily to monthly, from minute data to hourly, and more. This allows the user to easily aggregate data to a less granular level.
collapse_by() - Take an tbl_time object, and collapse the index so that all observations in an interval share the same date. The most common use of this is to then group on this column with dplyr::group_by() and perform time-based calculations with summarise(), mutate() or any other dplyr function.
collapse_index() - A lower level version of collapse_by() that directly modifies the index column and not the entire tbl_time object. It allows the user more flexibility when collapsing, like the ability to assign the resulting collapsed index to a new column.
rollify() - Modify a function so that it calculates a value (or a set of values) at specific time intervals. This can be used for rolling averages and other rolling calculations inside the tidyverse framework.
create_series() - Use shorthand notation to quickly initialize a tbl_time object containing a regularly spaced index column of class Date, POSIXct, yearmon, yearqtr or hms.
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