search for: q_a

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2011 Nov 15
1
Estimating model parameters for system of equations
Hi all, I'm trying to estimate model parameters in R for a pretty simple system of equations, but I'm having trouble. Here is the system of equations (all derivatives): eqAlgae <- (u_Amax * C_A) * (1 - (Q_Amin / Q_A)) eqQuota <- (p_max * R_V) / (K_p + R_V) - ((Q_A-Q_Amin)*u_Amax) eqResource <- -C_A * (p_max * R_V) / (K_p + R_V) eqSystem <- list(C_A = eqAlgae, Q_A = eqQuota, R_V = eqResource) I want to estimate u_Amax, Q_Amin, p_max and Q_Amin with the data I've collected using least squa...
2010 Jul 19
3
concatenating column names in a loop
..."1" x[1,2] <- "2" x[1,3] <- "3" I would like to create a new matrix with column names based on the column names in x. Specifically, I would like the column names in y to be "q_" plus the corresponding column name in x. So y[,1] should be named "q_a", y[,2] should be names "q_b", and y[,3] should be named "q_c". Here is the code I am trying: y <- matrix(nrow = nrow(x), ncol = ncol(x)) for (i in 1:ncol(x)){ colnames(y)[i] <- paste("q_", (colnames(x)[i]), sep = "") } Alas, it does not...
2007 Apr 14
6
[LLVMdev] Regalloc Refactoring
On Thu, 12 Apr 2007, Fernando Magno Quintao Pereira wrote: >> I'm definitely interested in improving coalescing and it sounds like >> this would fall under that work. Do you have references to papers >> that talk about the various algorithms? > > Some suggestions: > > @InProceedings{Budimlic02, > AUTHOR = {Zoran Budimlic and Keith D. Cooper and Timothy
2008 Jun 30
4
Rebuild of kernel 2.6.9-67.0.20.EL failure
Hello list. I'm trying to rebuild the 2.6.9.67.0.20.EL kernel, but it fails even without modifications. How did I try it? Created a (non-root) build environment (not a mock ) Installed the kernel.scr.rpm and did a rpmbuild -ba --target=`uname -m` kernel-2.6.spec 2> prep-err.log | tee prep-out.log The build failed at the end: Processing files: kernel-xenU-devel-2.6.9-67.0.20.EL Checking