search for: hcatbr

Displaying 5 results from an estimated 5 matches for "hcatbr".

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2012 Feb 02
9
sqldf for Very Large Tab Delimited Files
Hi All, I have a very (very) large tab-delimited text file without headers. There are only 8 columns and millions of rows. I want to make numerous pieces of this file by sub-setting it for individual stations. Station is given as in the first column. I am trying to learn and use sqldf package for this but am stuck in a couple of places. To simulate my requirement, I have taken iris dataset as an
2010 Oct 08
2
Error message in as.brob Usage
I am getting the following error message while using the as.brob function in some computations: Error in out.x[ss] <- pmax(x1[ss], x2[ss]) + log1p(+exp(-abs(x1[ss] - : NAs are not allowed in subscripted assignments Is there any obvious mistake I am making here that can resolve the above error message? Thanks for your help. Chow -- View this message in context:
2012 Jun 15
0
Syntax for nls optimization function
I am working on minimization of sum of squared errors for a problem that has 2 box-constrained parameters. I got the solution for this problem using "L-BFGS-B" method in optim function using an R code as res<-optim(par=c(parInit), fn=myFunction, method = c("L-BFGS-B"), lower = parMin, upper = parMax,
2011 Dec 03
2
Downloading tab separated data from internet
Hi all, I am trying to download some tab separated data from the internet. The data is not available directly at the URL that could be known apriori. There is an intermediate form where start and end dates have to be given to get to the required page. For example, I want to download data for a station 03015795. The form for this station is at:
2011 May 03
2
adaptIntegrate - how to pass additional parameters to the integrand
Hello, I am trying to use adaptIntegrate function but I need to pass on a few additional parameters to the integrand. However, this function seems not to have the flexibility of passing on such additional parameters. Am I missing something or this is a known limitation. Is there a good alternative to such restrictions, if there at all are? Many thanks for your time. HC -- View this message in