Questions tagged [r]
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508,254
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outer() equivalent for non-vector lists in R
I understand how outer() works in R:
> outer(c(1,2,4),c(8,16,32), "*")
[,1] [,2] [,3]
[1,] 8 16 32
[2,] 16 32 64
[3,] 32 64 128
It basically takes 2 vectors, finds the ...
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1
vote
2
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ggplot2: using the geom_area() function
I have a data frame showing four classes for each year, along with their respective shares of the total for that year.
> head(df)
class year share
1 class1 1975 0.806
2 class2 1975 0....
- 980
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votes
10
answers
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Stopwatch function in R
Is there an R timer or stopwatch function similar to MATLAB's tic/toc?
- 1,467
2
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1
answer
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How to export data from ROCR package
I am trying to export biometric data from an analysis using the ROCR package. Here is the code that I've done so far:
pred = performance(Matching.Score,Distribution)
perf = prediction(pred,"fnr", "...
- 23
51
votes
3
answers
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Multivariate time series modelling in R
I want do fit some sort of multi-variate time series model using R.
Here is a sample of my data:
u cci bci cpi gdp dum1 dum2 dum3 dx
16.50 14.00 53.00 45.70 80....
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votes
3
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Strange error when using sparse matrices and glmnet
I'm getting a weird error when training a glmnet regression.
invalid class "dgCMatrix" object: length(Dimnames[[2]])' must match Dim[2]
It only happens occasionally, and perhaps only under larger ...
- 9,734
31
votes
2
answers
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How to run R on a server without X11, and avoid broken dependencies
I'm running R 2.9 on a large EC2 Ubuntu instance, loaded with RAM, but without a terminal. When I load a library that has display dependencies, such as the sqldf package, I receive the following ...
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18
votes
1
answer
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Generating non-duplicate combination pairs in R
Sorry for the non-descriptive title but I don't know whether there's a word for what I'm trying to achieve.
Let's assume that I have a list of names of different classes like
c( '1', '2', '3', '4')
...
- 5,979
21
votes
12
answers
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What useful R package doesn't currently exist? [closed]
I have been working on a few R packages for some general tools that aren't currently available in R: blogging, report delivery, logging, and scheduling. This led me to wonder: what are the most ...
17
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2
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Debugging generic functions in R
How do you debug a generic function (using debug, or mtrace in the debug package)?
As an example, I want to debug cenreg in the NADA package, specifically the method that takes a formula input.
You ...
- 120k
6
votes
2
answers
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Is there a free Statistics Package for Delphi?
Is there an open source and/or free statistics package or library for Delphi? I'm looking for something that can compile directly into the executable, so no DLL's. It needs to be compatible with ...
- 20.1k
212
votes
9
answers
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For each row in an R dataframe
I have a dataframe, and for each row in that dataframe I have to do some complicated lookups and append some data to a file.
The dataFrame contains scientific results for selected wells from 96 well ...
- 3,480
7
votes
3
answers
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Applying a function to a distance matrix in R
This question came today in the manipulatr mailing list.
http://groups.google.com/group/manipulatr/browse_thread/thread/fbab76945f7cba3f
I am rephrasing.
Given a distance matrix (calculated with ...
- 9,051
0
votes
1
answer
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Per panel smoothing in ggplot2
I'm plotting a group of curves, using facet in ggplot2. I'd like to have a smoother applied to plots where there are enough points to smooth, but not on plots with very few points. In particular I'd ...
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9
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Filter data.frame rows by a logical condition
I want to filter rows from a data.frame based on a logical condition. Let's suppose that I have data frame like
expr_value cell_type
1 5.345618 bj fibroblast
2 5.195871 bj fibroblast
3 ...
- 5,979