Displaying 3 results from an estimated 3 matches for "columun".
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2007 May 04
2
Get the difference between two matrices with different length
Hello,
I have got two matrices with different length. The matrices have 3
columuns. The first two are coordinates. The third is a measurement.
Now I want to get a subtraction between every single value of the
third column (between matrix1 and matrix2), but only if the two
first coordinates in matrix1 and matrix2 are the same.
I tried "FUN=?" in aggregate and ave, b...
2008 Aug 18
1
GeoR model.control - defining covariates at prediction locations
Hi,
Im using geoR and I'm trying to do some predictions, based on an external
trend.
I'm having some problems specifying my model.control, specifically how do I
define my model, and also the source of the covariate data at the prediction
locations?
I am assuming that the covariate data at the prediction locations should be
imported to a geodata object along with the prediction location
2009 Jan 13
5
Trouble about the interpretation of intercept in lm models
Hallo,
yesterday I was puzzled when I discovered that I
probabliy miss something in the interepretation of intercept
in two-way lm models.
I thought that the intercept, using the default contr.treatment
contrasts, represents the mean of the group of observations
having zero in all column of the model.matrix.
It turns out not to be case
To be more more clear I am attaching a short example: