Displaying 2 results from an estimated 2 matches for "chondrite".
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chondrit
2001 Feb 28
1
Spider diagrams
Hi, I am trying to create what are called "spider diagrams" in the geochemical
literature using R. A spider diagram is basically a plot of the atomic number
versus the concentration on a log scale. Lines are drawn from each atomic
number for each sample.
Right now, my data frame looks like:
SAMPLE SITE V3 LA.NASC LAATNUM CE.NASC CEATMNUM
1 1A:001
2003 Jul 17
0
Silverman modality test
Dear R users,
I've written the following functions to implement Silverman's modality
test ("Using kernel density estimates to investigate multimodality", J.R.
Stat. Soc. B, 43, (1981), 97-99.), and I tested them on the Chondrite data
set (Good & Gaskins, J. Amer. Stat. Ass., 75, (1980), 42-56). Values for
the critical window width seem OK, which is not the case for the
significance levels.
If someone could give me a hint about what is wrong...
Or perhaps someone has already done a real implementation of this test?
T...