search for: my_vector

Dear all, this is a rather basic question; i am not sure how to structure my data well: I want to extraxt various measures from my raw-data. These measures are of different sizes, so I decided to store them in a list, like: run1 <- list(Dom = (my_vector), mean = (my_single_number)) I can do that in a for loop for 40 runs, ending up with 40 lists: run1, run2, ..., run40. To have all the measurements neatly together I thought of making another list, containing 40 sub-lists: > ALL <- list(run1, run2,..., run40) > ALL [[1]] [[1]]$Dom [1]...

I am pretty new to R. So this may be an easy question for most of you. ? I would like to calculate the squared distances of a large set (let's say 20000) of vectors (let's say dimension of 5) to a fixed vector. ? Say I have a data frame MY_VECTORS with 20000 rows and 5 columns, and one 5x1 vector y. I would like to efficiently calculate the squared distances?between each of the 20000 vectors in MY_VECTORS and y. ? The squared distance between two vectors x and y can be calculated: distance <- crossprod(x-y) ? Without looping, what is?the...

Hi, I'm trying to figure out how to properly construct a graph of frequencies of a difference between 2 values, that is | i | - | j |. I'd like to know the best way to store the actual data because of course doing my_vector[i -j] will not work because the index could be negative. I know there's no hash table so what's the best solution, simplicity-wise ? Use a list of pair of values {index, i - j} ? Or can I somehow use negative index, perhaps using 0array ? Any help would be appreciated :) ATM, I use as....