search for: densify

Hello I would like to calculate a weighted line integral. The integral is calculated by the cells that this lines trasverses (the small cells belong to matrix (m*n) that represent the value that a specific area has. I need to calculate the weights by finding out how much the line touches or impinges inside a cell. The weight is less if a line just touches one of the four edges of a square

...a (sparse) GLM (i.e. a summary function for class glpModel). Am I going about this the right way? Are they perhaps more efficient ways of doing this when working with sparse matrices. Is there a preferred way of calculating t-statistics? Note that 'rankMatrix' from package Matrix appears to densify the matrix before use, so this is not a viable option. I have asked a similar question before [1], though I am now trying to 'answer' it myself by digging in and actually coding a bit more myself, however, as you can see I'm still a bit stuck :-( Thanks for any suggestions, Carson [...