Publications by Kay Cichini
A Little Webscraping-Exercise…
In R it's quite easy to pull out anything from a webpage and I'll show a little exercise in doing so.Here I retrieve all blog addresses from R-bloggers by the function readLines() and some subsequent data processing.Read more » Related To leave a comment for the author, please follow the link and comment on their blog: theBioBucket*. R-blogg...
623 sym 4 img
A Simple Example for the Use of Shapefiles in R
A simple example for drawing an occurrence-map (polygons with species' points) with the R-packages maptools and sp using shapefiles.HERE is the example data.Read more » Related To leave a comment for the author, please follow the link and comment on their blog: theBioBucket*. R-bloggers.com offers daily e-mail updates about R news and tutori...
564 sym 4 img
Using IUCN-Data, ArcMap 9.3 and R to Map Species Diversity
..I'm overwhelmed by the ever-growing loads of data that's made available via the web. I.e., IUCN collects and hosts spatial species data which is free for download. I'm itching to play with all this data… And, in the end there may arise some valuable outcome:In the below examples I made a map for amphibian species richness – without much eff...
1303 sym 4 img
Web Scraping Google Scholar & Show Result as Word Cloud Using R
OUTDATED! Please see the update HERE!…When reading Scott Chemberlain's last post about web-scraping I felt it was time to pick up and complete an idea that I was brooding over for some time now:When a scientist aims out for a new project the first thing to do is to evaluate if other people already have come along to answer the very questions he...
1264 sym 4 img
Some Simple but Propably Useful Regex Examples with R-Package stringr…
I found that examples for the use of regex in R are rather rare. Thus, I will provide some examples from my own learning materials – mostly stolen from the help pages, with small but maybe illustrative adaptions.ps: I will extent this list of examples HERE occasionally.. Read more » Related To leave a comment for the author, please follow t...
680 sym 4 img
Next Level Web Scraping
The outcome presented above will not be very useful to most of you – still, this could be a good example for what possibly can be done via web scraping in R.Background: TIRIS is the federal geo-statistical service of North-Tyrol, Austria. One of many great things it provides are historical and recent aerial photographs. These photographs can be...
1180 sym 2 img
R-Function GScholarScraper to Webscrape Google Scholar Search Result
Based on my previous post on Web Scraping I coded and uploaded the Function “GScholarScraper” HERE for testing!The function will pull all (!) results, processing pages in chunks of 100 results/titles, and return a file with all titles, links, etc. It will also produce a word cloud using the words in the publication titles.Please t...
1493 sym Python (379 sym/1 pcs) 2 img
Add Transparency to JPEG – Yes, We Can!
…Just read you JPEG and add an alpha channel manually, then assign values for transparency. Of course for printing you need to use a device that accepts alpha.See how it’s done HERE. Related To leave a comment for the author, please follow the link and comment on their blog: theBioBucket*. R-bloggers.com offers daily e-mail updates about ...
578 sym 4 img
An Image Crossfader Function
Some project offspin, the jpgfader-function (the jpgfader-function in funny use can be viewed HERE):Read more » Related To leave a comment for the author, please follow the link and comment on their blog: theBioBucket*. R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if...
507 sym 2 img
In Reply to Ben Bolker’s Post "Google Scholar (still) sucks"
Replying to Ben Bolker’s post Google Scholar (still) sucks:Ben,thanks for illustrating the issue in your post!The main purpose of my function GScholarScraper is to retrieve titles – just because this is the best we can get from Google Scholar. Abstracts are truncated and thus shouldn’t be used for meta-analysis. Also titles are truncated, a...
1409 sym 2 img