[R] Intersection for two curves

David Winsemius dwinsemius at comcast.net
Sat Apr 24 15:37:33 CEST 2010

On Apr 24, 2010, at 9:05 AM, hadley wickham wrote:

>>> rm(list=ls())
>> PLEASE, DON'T DO THAT!!!!. Or rather you can do it in your  
>> workspace but
>> don't post it. It's not fair to a person who may not read your code  
>> line by
>> line before pasting it into their workspace and having it wiped  
>> out. Do you
>> expect us to completely clear out our workspaces just so we can  
>> answer your
>> questions? At the very least comment it out so it doesn't blow away  
>> half a
>> days work for someone who is trying to be helpful.
> If clearing out your workspace destroys *any* work, then something is
> seriously wrong with your workflow.

Perhaps, true in some respects. I am still chiseling out work using  
primitive editing tools. But it still takes several minutes to load  
the objects I am working on into memory and then several minutes each  
to build new models. The models still reside in memory, since I do not  
know any method for automatically saving the output that would not  
further increase the time expended. Typically I am working on .Rdta  
files that are 400MB on disk and then are around 4GB in RAM. I need to  
make a tradeoff between the time I would lose in saving after every  
<n> models or tabulation, versus the security of having everything  
saved. If you want to recommend methods that would speed those  
processes, I'm surely all ears.

> Hadley
> -- 
> Assistant Professor / Dobelman Family Junior Chair
> Department of Statistics / Rice University
> http://had.co.nz/

David Winsemius, MD
West Hartford, CT

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