Publications by grumble10
Using the rasterVis package for raster plotting (in R)
Here is a post discussing the possibilities of the rasterVis package: http://rpubs.com/Lionel/6374Filed under: R and Stat Tagged: R, raster Related To leave a comment for the author, please follow the link and comment on their blog: biologyforfun » R. R-bloggers.com offers daily e-mail updates about R news and tutorials about learnin...
547 sym 16 img
Advanced settings in ggplot2 (R)
Here is a post with some information to control the layout of your graph produced by the ggplot library: http://rpubs.com/Lionel/6557 Enjoy!Filed under: R and Stat Tagged: ggplot, R Related To leave a comment for the author, please follow the link and comment on their blog: biologyforfun » R. R-bloggers.com offers daily e-mail update...
589 sym 16 img
Generalized Linear Modelling in R (part 1)
In classical linear modelling we are assuming that the response variable (Y) is normally distributed, however for certain type of data like count data or presence/absence data this is not the case. There is in statistic an ensemble of technique called Generalized Linear Modelling (GLM in short) where the reponse variable follow one known distribu...
2328 sym R (2135 sym/2 pcs) 20 img
Non-linear regression in R
Here is the link to the article: http://rpubs.com/hughes/7812 There you will discover how to simulate and fit: power function, Michaelis-Menten equation and sigmoid curves in R, the fit is done by least-square using the ‘nls’ function.Filed under: R and Stat Tagged: NLS, R Related To leave a comment for the author, please follow the...
681 sym 16 img
Manipulation of the legend in ggplot2 (R)
You are one click away from a post on the various way one can change the legend title in ggplot2, combine several aesthetic, remove the legend in ggplot2. http://rpubs.com/hughes/10012Filed under: R and Stat Tagged: ggplot2, R Related To leave a comment for the author, please follow the link and comment on their blog: biologyforfun » ...
634 sym 16 img
Simulating dice throws in R
I am currently following a course on probability theory in coursera (https://www.coursera.org/course/probas) and I’ve seen some graphs concerning the outcome of some dice throws. Being an R-nerd I wrote a little function to do this in R. This is nothing fancy just I find it interesting the process of thoughts going from a real-world problem (10...
1296 sym 18 img
Adding color to R plot: a function
A friend of mine told me that she was spending her day colouring R plot because she never understood how to put color in them. This triggered a nerdy reaction in me that I had to put in a basic function. This was actually a funny exercise for two reasons: forced me to think at the place of someone else (called empathy which I may be lacking), mad...
3348 sym 18 img
Computing R square for Generalized Linear Mixed Models in R
R square is a widely used measure of model fitness, in General Linear Models (GLM) it can be interpreted as the percent of variance in the response variable explained by the model. This measure is unitless which makes it useful to compare model between studies in meta-analysis analysis. Generalized Linear Mixed models (GLMM) are extending GLM by ...
6416 sym 16 img
Generalized Linear Mixed Models in Ecology and in R
I had a nice workshop two weeks ago in Tübingen (south-germany) concerning Generalized Linear Mixed Models (GLMM) in R. The course was given by two ecologist: Dr. Pius and Fränzi Korner-Nievergelt that spend now half of their time doing statistical consulting (http://www.oikostat.ch/navigation_engl.htm). Nice reference concerning GLMMs are: t...
1771 sym R (9541 sym/1 pcs) 20 img
Interpreting interaction coefficient in R (Part1 lm)
Interaction are the funny interesting part of ecology, the most fun during data analysis is when you try to understand and to derive explanations from the estimated coefficients of your model. However you do need to know what is behind these estimate, there is a mathematical foundation between them that you need to be aware of before being able t...
5029 sym R (3306 sym/3 pcs) 20 img