Hi,
Thanks for all your help with my previous question, hopefully this one is slightly less stupid. I have a matrix like: yuvmat 0.299 0.587 0.114 _0.147 _0.289 0.436 0.615 _0.515 _0.1 Along with this matrix, I have some data in an nx4 format. I would like to process this data by removing the last element and then multiplying each row vector by the matrix, and return an nx3 list of the resultant vectors. I got that I can use '}:"1 data' to remove the last element, and have matrix multiplication as 'x =: +/ .*', however I cannot figure out how to multiply the matrix by each vector, rather than by the entire list. Thanks for your help with this, Joe Peralta ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
