Displaying 4 results from an estimated 4 matches for "visser_md".
2007 Apr 18
3
Matrix or grid conversion of spatial data
Dear Happy R-users & experts,
I am in need of advice,
While working with spatial data (x & y coordinates of seed locations) I have come accross the problem that I need to convert my point data into a matrix or grid system. I then need to count how often a point falls into a certain position in the matrix or grid. I have searched all day online, asked collegeas but nothing works.
Sadly
2007 Jun 29
4
Dominant eigenvector displayed as third (Marco Visser)
Dear R users & Experts,
This is just a curiousity, I was wondering why the dominant eigenvetor and eigenvalue
of the following matrix is given as the third. I guess this could complicate automatic selection
procedures.
0 0 0 0 0 5
1 0 0 0 0 0
0 1 0 0 0 0
0 0 1 0 0 0
0 0 0 1 0 0
0 0 0 0 1 0
Please
2005 Nov 27
4
Counting the occurence of each unique "charecter string"
LS,
I would really like to know how to count the frequency/occurrence of chachters inside a dataset. I am working with extreemly large datasets of forest inventory data with a large variety of different species inside it.
Each row inside the dataframe represents one individual tree and the simplified dataframe looks something like this:
num species dbh
1 sp1
2005 Nov 27
4
Counting the occurence of each unique "charecter string"
LS,
I would really like to know how to count the frequency/occurrence of chachters inside a dataset. I am working with extreemly large datasets of forest inventory data with a large variety of different species inside it.
Each row inside the dataframe represents one individual tree and the simplified dataframe looks something like this:
num species dbh
1 sp1