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Results tagged with r
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user 221
Use this tag for any *on-topic* question that (a) involves `R` either as a critical part of the question or expected answer, & (b) is not *just* about how to use `R`.
3
votes
2
answers
2k
views
Reaction norms model in R
Anyone knows any R package/function to run a reaction norms model for the analysis of genotype × environment interactions? …
- 2,115
2
votes
Reaction norms model in R
I answered myself. I found the following paper where the lme4 package is used to perform a reaction norm analysis: Methods in Ecology and Evolution 2011(2), 362–374.
However, if someone can provide mo …
- 2,115
5
votes
Free resources for learning R
The R project website has lots of manuals to start, and I suggest you the Nabble R forum and the R-bloggers site as well. …
2
votes
How to read large dataset in R
I,m totally agree with Dirk answer. One suggestion. I have found very useful the use of programming languages such as AWK or others when assessing large databases. So, I was able to filter the data I …
- 2,115
2
votes
Clustering (k-means, or otherwise) with a minimum cluster size constraint
How large is your data set? Maybe you could try to run a hierarchical clustering and then decide which clusters retain based on your dendrogram.
If your data set is huge, you could also combine both …
- 2,115
54
votes
3
answers
255k
views
Different ways to write interaction terms in lm?
,"s", "rs", "y"),
row.names = c(NA, -20L), class = "data.frame")
Two equivalent ways to specify the model with interactions are:
lm0 <- lm(y ~ r*s, data=d)
lm1 <- lm(y ~ r + s + r:s, data=d) … 2.92
---
n = 20, k = 4
residual sd = 3.27, R-Squared = 0.87
summary(lm2)
lm(formula = y ~ r + s + rs, data = d, x = TRUE)
coef.est coef.se
(Intercept) 21.94 1.46
rr2 11.32 …
- 2,115
11
votes
What programming language do you recommend to prototype a machine learning problem?
EDIT 1: I agree with other people who prefer to work in R. …
- 2,115