search for: lgpeco

hy guys i have one question :) i have two vectors markets and price market <- c(1, 5, 7, 9, 9, 6, 5, 4, 4, 3, 1, 2, 1) price <- c(100, 20, 30, 10, 50, 23, 23, 33, 96, 6, 4, 38, 96) i would like sum prices: market 1: (100+4+96), market 2: (38),..., market 9: (10+50) ao i would like get this result: (200, 38, ..., 60) and i don't wanna use while, for loops... is there any other function

## i have one question anouth this package.. library(datasets) eurodist ## if i type this i get max distance between european cities > max(eurodist) [1] 4532 ## but i would like get something like this: 4532 Gilbratar - Anthens ## and another one.. ## if a live in barcelona and i would like travel in all cities ## how can i get sum of all distance to other cities... i try