Defensive programming Error Handling in R
"Fail fast!" principles to inform users early with information to debug. Be strict about what you accept. Check the input variable type and use stopifnot() or if and stop() Avoid…
R data wrangling
This code snippet has nice examples of data wrangling From https://www.jumpingrivers.com/blog/r-d3-intro-r2d3/ scoobydoo = tuesdata$scoobydoo # wrangling data into nice shape monsters_caught = scoobydoo %>% select(date_aired, starts_with("caught")) %>% mutate(across(starts_with("caught"), ~ as.logical(.)))…
How to work with a new github branch
Once you were able to properly authenticate and clone (download) a repository you have a read/write access to, it's time to create a new branch. Why create a branch? it's…
Ways to download ERDDAP Data using python
ctx = ssl.create_default_context() ctx.check_hostname = False ctx.verify_mode = ssl.CERT_NONE url = 'https://oceanwatch.pifsc.noaa.gov/erddap/griddap/sw_chla_monthly_2018_0.nc?chlor_a[(1997-10-16T12:00:00Z):1:(2010-10-16T12:00:00Z)][(25):10:(15)][(198):10:(208)]' file_name = "sw.nc" with urllib.request.urlopen(url, context=ctx) as u, \ open(file_name, 'wb') as f: f.write(u.read()) print('complete') source: https://github.com/CoastWatch-WestCoast/python_code/blob/satellite_course_jan_2022/compare_satellite_timeseries.ipynb def…
How to add conda/mamba environment to jupyter notebook
Create conda environment called, "myenv" (environment name can be anything) conda create --name myenv Activate "myenv" environment conda activate myenv Install ipykernel (ipykernel is python execution backend for jupyter) conda…
How to convert geotiff to netcdf using gdal and python MacOS
My current python version is 3.11.3 on MacOS First create python environment, then install gdal in the environment create conda environment; I named my environment gdalenv Activate the environment then…
git, how to set up multiple ssh keys for github repositories
For creating one ssh key for all github repositories, go here Create ssh keys Go to .ssh directory under your user root directory (or anywhere you want to store your…
git warning: CRLF will be replaced by LF
I was trying to commit files that were created by other developer and I got the following warning. End of Line is handled differently by different operating systems, so When…
Landkit Installation Error
Landkit template is managed by webpack via node. I kept getting an error to start the webserver. How to debug: read the errors and see what is causing errors my…
How to change git remote url
git remote set-url origin https://git-repo/new-repository.git
git cheatsheet
How to change the git host URL # to create a new remote url git remote -v # to print and view the remote address for push and pull git…
How to add column scrollbar on top in report, Oracle APEX
The scrollbar is located at the bottom of the report by default. You can add a top scrollbar for better usability. Click on the Page in CSS --> inline, add…
Kaggle Course – geospatial analysis summary
Source: https://www.kaggle.com/learn/geospatial-analysis, This is the code summary note for the Kaggle geospatial analysis geopandas frame has a geometry column that shows either a point/line/polygon Part 1: Your first map source:…
rust error: unused manifest key: package.rand
Newbie error.. I kept getting an error : unused manifest key: package.rand even though I included the following: rand = "0.8.3" My error was the location of where I added…
Rust: guessing game
Source: https://doc.rust-lang.org/book/ch02-00-guessing-game-tutorial.html Here's the cheatsheet and summary of the rust tutorial (source) $ cargo new myproj $ cd myproj $ vi src/main.rs # to edit $ cargo run file: main.rs…