Good Morning,
I'm having what I hope to be a simple problem. I am generating bootstrap
confidence intervals using package (boot) - which works perfectly. The issue
I am having is getting the results into a format which I can write out to a
database. To be clear I am having no problems generating the results, I just
need to convert the format of the results such that I can store the results
in a dataframe to save out to a database.
I am doing the following:
## Generate 20,000 bootstrap samples
cod.boot <- boot(trimmed$ratio, cod, R=20000)
## generate 90% BCA boostrap confidence intervals
codboot <- boot.ci(cod.boot,conf = c(0.90), type= c("bca"))
At this point I have stored the answer I want to the variable codboot, but
the problem is it is in the format as follows:
BOOTSTRAP CONFIDENCE INTERVAL CALCULATIONS
Based on 20000 bootstrap replicates
CALL :
boot.ci(boot.out = cod.boot, conf = c(0.9), type = c("bca"))
Intervals :
Level BCa
90% ( 6.10, 10.23 )
Calculations and Intervals on Original Scale
What I would like is the 6.10, and 10.23 each stored in their own variables
so I can combine them into my existing dataframe (using cbind). The best
I've been able to do so far is:
a <- codboot[c(4)]
which gives me a:
$bca
conf
[1,] 0.9 2343.41 19683.87 6.099788 10.23007
which is closer, but I cannot parse this variable enough to get the 6.10 and
10.23 out since apparently strsplit doesn't allow splitting on spaces.
Any help would be greatly appreciated!
Best Regards & Thank You in Advance
Patrick
--
Patrick Santoso
University of New Hampshire
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