search for: dection

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2011 Mar 08
4
minimum distance between line segments
...lines endpoints AND their midpoints would be a good proxy for this, so I set up a loop that uses pythagoras to work out these 9 distances and find the minimum. But, this solution is obviously flawed as well (sometimes lines actually intersect, sometimes the minimum distances are less etc). Any help/dection on this one would be much appreciated. Thanks in advance, Darcy.
2024 Jan 22
1
Use of geometric mean .. in good data analysis
...gt; quickly without too much thought, because things must happen fast ---to > hopefully save the other's life. Martin, Thanks very much. I will look further into this because toxic metals and organic compounds in geochemical collections almost always have censored lab results (below method dection limits) that range from about 15% to 80% or more, and there almost always are very high extreme values. I'll learn to understand what benefits log transforms have over compositional data analyses. Best regards, Rich
2024 Jan 22
2
Use of geometric mean .. in good data analysis
...because things must happen fast ---to > > hopefully save the other's life. > > Martin, > > Thanks very much. I will look further into this because toxic metals and > organic compounds in geochemical collections almost always have censored > lab > results (below method dection limits) that range from about 15% to 80% or > more, and there almost always are very high extreme values. > > I'll learn to understand what benefits log transforms have over > compositional data analyses. > > Best regards, > > Rich > > _____________________________...
2024 Jan 22
1
Use of geometric mean .. in good data analysis
...---to >> > hopefully save the other's life. >> >> Martin, >> >> Thanks very much. I will look further into this because toxic metals and >> organic compounds in geochemical collections almost always have censored >> lab >> results (below method dection limits) that range from about 15% to 80% or >> more, and there almost always are very high extreme values. >> >> I'll learn to understand what benefits log transforms have over >> compositional data analyses. >> >> Best regards, >> >> Rich >&gt...
2024 Jan 22
2
Use of geometric mean .. in good data analysis
>>>>> Rich Shepard >>>>> on Mon, 22 Jan 2024 07:45:31 -0800 (PST) writes: > A statistical question, not specific to R. I'm asking for > a pointer for a source of definitive descriptions of what > types of data are best summarized by the arithmetic, > geometric, and harmonic means. In spite of off-topic: I think it is a good