Questions tagged [data-table]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0
votes
0answers
11 views

tableau view with dimensions totals, static values and calculation

I try to create a table like the one following. I got 1 line product, 1 dimension "zones" and I want to add few columns : total for pieces on a line, a fixe value for a product(stock mini), ...
0
votes
1answer
21 views

Having issues with DataSet [closed]

I just started learning data science and am having a problem when generating a dataset. Dataset: ...
0
votes
0answers
15 views

Is it worth switching from dplyr code to data.table in r shiny that have various reactive data?

I am sort of new in R & recently came across data.table package that is probably ~ 10 times faster than dplyr in various operations. I have a shiny app based on Covid data that is getting heavier ...
0
votes
2answers
27 views

Identifying patterns in tabular data

I have a set of tables containing some thousand entries and some tenths of columns from machine status values of production. The entries are of mixed types like string, float, or timestamp. Each table ...
1
vote
1answer
19 views

Pandas: Group by Single Column Entries [closed]

So have this table above. I'm trying to aggregate the occupations such that the table results in: I've tried using df.groupby(['Occupation']) but I get an error. ...
0
votes
0answers
33 views

Predicting next rows in tabular dataset

I have a tabular dataset of financial transactions with a target binary variable 'isFraud' which indicates if the transaction is fraud or not. I want to build a model that given some past trasactions, ...
1
vote
0answers
23 views

Are there decisive leaders in programming with tabular data?

What are the most effective bread-and-butter in-memory open source tabular data frameworks today? I have been working with tabular data for years with an in-house solution that integrates with Excel ...
1
vote
0answers
1k views

Calculating % by Dividing Filtered Matrix Columns in MS Power BI

Given: A monthly percentage (%) metric has to be calculated from dividing a column ('Numerator') from one table by a column ('Denominator') from another table, both filtered by month, as given in an ...
0
votes
1answer
84 views

How do you see the element of a csv table with many columns (>30) which the names of its columns is more than 10 character in pandas?

How do you see in pandas the element of a csv table with many columns (>25) which the names of its columns is more than 10 character? I have 5000 rows and 32 columns and the label of some columns ...
11
votes
4answers
49k views

How to Write Multiple Data Frames in an Excel Sheet

I have multiple data frames with same column names. I want to write them together to an excel sheet stacked vertically on top of each other. And between each, there will be a text occupying a row. ...
3
votes
2answers
4k views

Mean across every several rows in pandas

I have a table of features and labels where each row has a time stamp. Labels are categorical. They go in a batch where one label repeats several times. Batches with the same label do not have a ...
0
votes
1answer
51 views

Software for automated database processing

I faced a problem which I'd like to solve w/o any programming. And looking for a software to do this. I have a dataset, for example: (brand-id, brand-name, product-class-name;) ...
1
vote
2answers
1k views

Theoretical Question: Data.table vs Data.frame with Big Data

I know that I can read in a very large csv file much faster with fread using the data.table ...
3
votes
1answer
319 views

Look for previous date in dataframe that has certain column category in R

I have the following data frame: ...
2
votes
1answer
29 views

How to make smaller categories with factor character variables

I have this data set with consist of ISO3166 Alpha-2 codes for countries. Example: DE, AD, AE etc They are coded as factor variables in R and there are about 173 observations. Now because there are ...
3
votes
4answers
2k views

rows to columns in data.table R (or Python)

This is something I can't achieve with the reshape2 library for R. I have the following data: ...
0
votes
1answer
1k views

R: Calculations based on frequencies / grouped / aggregate data

I am trying to do simple calculations in R when no raw data but grouped data with frequencies is available only. This is the case when I have a large amount of records in a database, say a large SQL ...
26
votes
4answers
22k views

Is pandas now faster than data.table?

Here is the GitHub link to the most recent data.table benchmark. The data.table benchmarks has not been updated since 2014. I ...
1
vote
0answers
36 views

Table function output and order of arguments

I have a silly question. Below is the output of a logistic regression analysis I did. I notice that when I switch the order of the arguments I put in the table function in R that it also switch the ...