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2007 Feb 09
3
CentOS 3 vs. CentOS 4 Memory Utilization
I'm helping some folks who have a CentOS 3 i386 server with 512MB of RAM. The output of 'free' looks like: $ free total used free shared buffers cached Mem: 511428 497956 13472 0 29868 178280 -/+ buffers/cache: 289808 221620 Swap: 2040244 120644 1919600 The box does not even have X installed...
2010 Apr 24
2
multiple paired t-tests without loops
I am new to R and I suspect my problem is easily solved, but I haven't been able to figure it out without using loops. I am trying to implement Blair & Karniski's (1993) permutation test. I've included a sample data frame below. This data frame represents the conditional means (C1, C2) for 3 subjects in 2 consecutive samples of a continuous data set (e.g. ERP waveform).