John MacKintosh https://johnmackintosh.com/ Data analyst based in Scotland. I can tell you whether that change between this period and the last one is something you need to act on. Skilled in SQL, R, Power BI and Excel, I build dashboards you'll actually use. en-GB Sat, 03 Oct 2026 00:00:00 +0000 Make sure you are on the correct site https://johnmackintosh.com/blog/old-site/ https://johnmackintosh.com/blog/old-site/ Sat, 03 Oct 2026 00:00:00 +0000 The website with my name ending dot net is not mine. Moving back home https://johnmackintosh.com/archive/website/ https://johnmackintosh.com/archive/website/ Wed, 09 Apr 2025 00:00:00 +0000 I've gone back to my old website domain. Population pyramid plots with base R https://johnmackintosh.com/archive/base-r-pyramids/ https://johnmackintosh.com/archive/base-r-pyramids/ Thu, 03 Apr 2025 00:00:00 +0000 Population pyramids using base R, via shiny, live in the browser. The life changing magic of tidying text files https://johnmackintosh.com/archive/tidying-text-files/ https://johnmackintosh.com/archive/tidying-text-files/ Sun, 22 Dec 2024 00:00:00 +0000 Bringing order to irregularly structured open data CSV files. new programming with data.table https://johnmackintosh.com/archive/dt-programming/ https://johnmackintosh.com/archive/dt-programming/ Mon, 05 Feb 2024 00:00:00 +0000 baby steps creating handy functions with the new data.table programming interface. more .I in data.table https://johnmackintosh.com/archive/more-dot-i/ https://johnmackintosh.com/archive/more-dot-i/ Sat, 03 Feb 2024 00:00:00 +0000 using .I and .N to retrieve the correct combination of records from grouped data .I in data.table https://johnmackintosh.com/archive/dot-i/ https://johnmackintosh.com/archive/dot-i/ Wed, 03 Jan 2024 00:00:00 +0000 A quick note to understand what the special operator .I does in data.table. non-equi joins in data.table https://johnmackintosh.com/archive/non-equi-joins/ https://johnmackintosh.com/archive/non-equi-joins/ Fri, 22 Dec 2023 00:00:00 +0000 A quick note to understand (non-equi) joins in data.table That's a W(RAP)! https://johnmackintosh.com/archive/ph-profiles/ https://johnmackintosh.com/archive/ph-profiles/ Wed, 06 Dec 2023 00:00:00 +0000 An ambition realised as a suite of R powered publications enter the public domain checks and {tiny}testing - a quick primer https://johnmackintosh.com/archive/checks-and-tests/ https://johnmackintosh.com/archive/checks-and-tests/ Sat, 07 Oct 2023 00:00:00 +0000 A quick intro to checking and testing your functions, with help from {checkmate} and {tinytest} Create your first Excel LAMBDA function https://johnmackintosh.com/archive/excel-lambda-intro/ https://johnmackintosh.com/archive/excel-lambda-intro/ Thu, 10 Aug 2023 00:00:00 +0000 Here's how to create a set of custom, lambda functions in Excel. No macros or VBA required. Fixing my broken VSCode setup for R https://johnmackintosh.com/archive/vsc/ https://johnmackintosh.com/archive/vsc/ Sat, 04 Feb 2023 00:00:00 +0000 Here's how I set up the correct user settings and keybindings for using R in VSCode On target https://johnmackintosh.com/archive/targets/ https://johnmackintosh.com/archive/targets/ Wed, 14 Dec 2022 00:00:00 +0000 A beginners introduction to getting started with the targets package in R Word Up - automatic reporting with MS Word, Officedown and flextable https://johnmackintosh.com/archive/word-up/ https://johnmackintosh.com/archive/word-up/ Wed, 21 Sep 2022 00:00:00 +0000 Recreating existing Word reports in RMarkdown with Officer, Officedown and flextable. modifying columns in datatable with lapply https://johnmackintosh.com/archive/lapply/ https://johnmackintosh.com/archive/lapply/ Tue, 30 Aug 2022 00:00:00 +0000 How to modify or update multiple columns in data.table with lapply and SDcols Exploring your database with shiny https://johnmackintosh.com/archive/dbexplorer/ https://johnmackintosh.com/archive/dbexplorer/ Tue, 14 Jun 2022 00:00:00 +0000 Programmatically querying a database with flexible SQL queries and visualising the results with shiny. Iterating over multiple database tables with the tidyverse https://johnmackintosh.com/archive/purrr-sql/ https://johnmackintosh.com/archive/purrr-sql/ Thu, 28 Apr 2022 00:00:00 +0000 Extracting data from multiple database tables with dplyr and purrr. Dynamic SQL queries with R https://johnmackintosh.com/archive/sql-schema-query/ https://johnmackintosh.com/archive/sql-schema-query/ Wed, 06 Apr 2022 00:00:00 +0000 Programmatic querying with dynamic schema, table and column names. Getting to know Julia https://johnmackintosh.com/archive/julia/ https://johnmackintosh.com/archive/julia/ Tue, 08 Mar 2022 00:00:00 +0000 Trying out some basic data operations (download, minimal wrangling and plotting) in Julia Separate SQL https://johnmackintosh.com/archive/separate-sql/ https://johnmackintosh.com/archive/separate-sql/ Tue, 08 Feb 2022 00:00:00 +0000 Why you should consider keeping your SQL queries in a separate file.