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Thanks Sarah, one of my column names was missing a letter so it was throwing things off. It works super fast now and is exactly what I needed. My actual data set has about 6 other ancillary response data data...

Sarah, I realized what I was saying after I pressed send on the email. It makes perfect sense now, thanks so much for your help and patience. On Mar 10, 2015 5:57 PM, "Sarah Goslee" <sarah.goslee at gmail...

Sarah, This strategy works great for this small dataset, but when I attempt your method with my data set I reach the maximum allowable memory allocation and the operation just stalls and then stops completely before it is finished. Do...

Hello everyone, I'm having trouble performing a task that is probably very simple, but can't seem to figure out how to get my code to work. What I want to do is use the sample function to pick...

Sarah, I have 669 sites and each site has 7 years of data, so if I'm thinking correctly then there should be 4683 possible combinations of site x year. For each year though I need 3 sampling periods so...

Petr, The reason I need to do this is that I'm going to be using some large datasets in WinBUGS, but there is some missing data for the files I'm using. In order to make the data files...

Hey Tom, This solution works great, but if I try to then insert it in my function that I've displayed above and apply it to my split dataframe I get the error message: Error in `[.default`(xj, i) : invalid...

Hello everyone, I have two very large dataframes (~1 million rows x 5 columns), of which two of the columns are lat/long coordinates. The names of the dataframes are 'data07' and 'data 08'. Data08 has a few more sampling...

That worked great, thanks so much David! On Wed, Mar 4, 2015 at 8:23 AM, David L Carlson <dcarlson at tamu.edu> wrote: > I'm not sure I understand, but I think you have a large data frame with...

Hello everyone, I'm having a problem with a function that I wrote that is supposed to add a row to dataframe based upon a conditional statement. To explain I've used an example below: #create data frame animals=c...

Hey everyone, I've written a function that adds NAs to a dataframe where data is missing and it seems to work great if I only need to run it once, but if I run it two times in a...

William, You say not to use apply here, but what would you use in its place? Thanks On Tue, Mar 10, 2015 at 2:13 PM, William Dunlap <wdunlap at tibco.com> wrote: > The key to your problem may be...