Time to stop the exploitation of free academic labour Ini tentang artikel dengan judul yang sama, yang ditulis oleh mendiang [Jon Tennant di Jurnal European Science Editing](https://ese.arphahub.com/article/51839/).

Makalah tersebut menjelaskan hubungan antara APC dengan status indeksasi jurnal dan status Journal Impact Factor (JIF) serta CiteScore jurnal-jurnal terbitan MDPI. Hasil utamanya adalah: >The charges levied by journals that had both IF and CiteScore were significantly higher than those charged by journals with neither IF nor CiteScore (p <0.05). The charges were also correlated to the age of the journal: the more recently launched journals charged less than the older journals did.

Lima (ternyata enam) kultur akademik yang terlupakan

The following plot shows the correlation between Cite Score 2017 vs SNIP 2017 and SJR 2017

This plot were produced using plotly package

Background This is the good thing about open database. Although Google Scholar (GS) is not a completely open database, but people at Google let us to do the following things using R and Scholar. The following post was my first trial to the scholar package to harvest GS data. Getting your GS ID Your GS ID will be written in the url of your profile, for instance: Erwin: url https://scholar.google.co.id/citations?user=Myvc78MAAAAJ&hl=en&authuser=1; GS ID “Myvc78MAAAAJ&hl”" Prof. Edy Soewono: url https://scholar.google.co.id/citations?user=6U_YtvMAAAAJ&hl=en&authuser=1; GS ID “6U_YtvMAAAAJ&hl” Prof. Khairurrijal: url https://scholar.google.co.id/citations?user=4_asJ0MAAAAJ&hl=en&authuser=1; GS ID “4_asJ0MAAAAJ&hl” Dr. Jon Tennant: url https://scholar.google.co.id/citations?user=P7FvGMEAAAAJ&hl=en; GS ID “P7FvGMEAAAAJ&hl”

The following slides are made for a short talk on introduction to R for chemistry student (Institut Teknologi Bandung) Wed, 13 April 2015, Room 9305, Labtek V, ITB

Artikel pendek ini menceritakan bagaimana mengatasi masalah pengunduhan makalah-makalah dari jurnal berbayar secara legal. Muncul pertama kali sebagai blogpost di http://dasaptaerwin.net/wp.

Ini adalah file berisi outline proyek buku kami berikutnya. Menulis (ilmiah) itu menyenangkan. Proyek ini saya kerjakan bersama istri saya (Cut Novianti). Baru draft, jadi silahkan memberikan komentar. Terimakasih atas perhatian dan apresiasinya.

The following slides are the materials presented in the 3rd Workshop Introduction to R: R in the library, ITB Central Library, 26 May 2015, 13.00-15.00.

My talk on Sarasehan Geologi Populer, 16th March 2015, at Badan Geologi. This talk covers various open source tools for geological and hydrogeological analysis with focus on Cikapundung river case. Some examples of R code to extract hidden pattern in the data set, in order to explain natural phenomenon.

This is the first draft for my upcoming talk in Sarasehan Geologi Populer, Badan Geologi, 13th March 2015.

This blogpost was my perspective on how important it is to include the word "Indonesia" in every part of a (scientific) document to increase its online (scientific) visibility.

This is part of my lecture on Exploration Hydrogeology, given for master students of Groundwater Engineering, Institut Teknologi Bandung, Indonesia. January 2015

This is the first R course in Institut Teknologi Bandung, and perhaps in Indonesia. This course covers the introductory part of R. Pls download R base from http://cran.r-project.org and R Studio from http://rstudio.com prior to entering the class. The materials will be available on https://github.com/dasaptaerwin/IntroR using R Markdown format (Rmd) and pdfs. As I am also prone to errors, please report as soon as you find them. For more engagement, I will be on: email: dasaptaerwin@outlook.co.id twitter: @dasaptaerwin

A blogpost on what is climate change. Posted at anakbertanya.com, written on R Markdown.

The following example is a PCA on water quality dataset.

Example of bubblePlot on water quality dataset This is an example of visualization of bubble plot on water quality dataset. The objective of this plot is to show comparison of element concentration in groundwater and in the river water. The river data plot is located in the lower right position of the figure, making an elbow-like shape. However, I haven't finished tweaking the code so it can show the figure in the correct size.

Example of levelPlot on water quality dataset This is an example of visualization of level plot on water quality dataset. The objective of this plot is to show comparison of element concentration in groundwater and in the river water. The river data plot is located in the lower right position of the figure, making an elbow-like shape. However, I haven't finished tweaking the code so it can show the figure in the correct size.

This was my learning process while trying out the randomForest package

This work is made based on my knowledge in R and several references listed in the document.

Post ini adalah update dari versi sebelumnya di http://rpubs.com/dasaptaerwin/27419 This post is an update from the previous posted as http://rpubs.com/dasaptaerwin/27419.

This tutorial replicates Kevin Markham tutorial (http://rpubs.com/justmarkham/dplyr-tutorial) in Indonesia language.

a short essay on how important data is

Updated from my previous post. I changed the boundary of "expandgrid" function in the fitting section.

Example of variogram codes. I'll add the explanation later

a simple plotting example using lattice package and World's electricity consumption from US Dept of Energy.

a simple codes to convert lat-long coordinates to UTM system. I also add a workaround using GIS app (QGIS and GRASS). Thanks to Dmitry Kolesov from GRASS GIS Facebook Community.

This is a short tutorial in using "pairs" function in R to make correlation matrix.

Preliminary #bibliometric analysis on several keywords with Microsoft Academic

Try out of timeseries analysis using "Forecsat" package by Rob J. Hyndman.

It is confusing to experience that R studio is behaving differently in different kinds of platforms. It is my personal experience. One of the problem occurs in installing R package. In this case "Forecast" by Rob J. Hyndman. Oftenly install is due to old version of R-base. So we need to upgrade it, and this is how.

try out armax and expuh routing to see the best fit using Cikapundung dataset (2007-2010)

an exercise of Hydromad package using Cikapundung catchment (West Java, Indonesia) dataset.

A way to solve auto restart after shutdown command. I use Ubuntu 13.10. This steps were previously suggested in http://goo.gl/RyKCiM