#data
10 public pages use this tag.
Columnar Thinking
Columnar Thinking columnar thinking is the habit of reasoning about data one column at a time rather than one row at a time. In brevvie python ai section 3 data polars and pair pro…
CSV Files
CSV Files csv files are plain text tabular data files where each row is a record and each column is separated by commas. In brevvie python ai section 3 data polars and pair program…
Data Cleaning
Data Cleaning data cleaning is the process of fixing data so analysis can proceed correctly. In brevvie python ai section 3 data polars and pair programming, it appears mainly thro…
Data Types vs Data Shapes
Data Types vs Data Shapes This page was filed from a query that asked: what are the different kinds of data types? Short answer The wiki uses a few overlapping lenses: column/dataf…
Database Mental Models
Database Mental Models database mental models is the foundational idea that spreadsheets, SQL tables, and dataframes all share the same core structure: rows, columns, and types. In…
Dtypes
Dtypes dtypes are the data types assigned to columns in structured datasets. In brevvie python ai section 3 data polars and pair programming, checking dtypes is presented as one of…
JSON
JSON json is the default data format learners inspect in brevvie python ai section 4 apis postman and calling the web. The source frames it as close to a Python dict: quoted keys, …
Schema Inspection
Schema Inspection schema inspection is the habit of checking a dataset’s shape, column names, null counts, and dtypes before doing analysis. In brevvie python ai section 3 data pol…
SQL
SQL sql is the standard language for querying structured tables in databases. In brevvie python ai section 3 data polars and pair programming, SQL is not taught directly, but the l…
Time-Series Data
Time Series Data time series data is data indexed by time: dates, datetimes, or ordered intervals. In brevvie python ai section 3 data polars and pair programming, time series anal…