R Programming
Logical Indexing
v[v>0]
v[confidence >0]
v[v>confidence]
v[v<0] = c(100, 200) # recycling
v[v<0] = v[v<0] + c(100, 200) # recycling
Matrix A
A[]
works for Matlab too.
Googlevis
Analyzing World Bank data with WDI, googleVis Motion Charts