How to select elements row-wise from a NumPy array?

Question

I have an array like this numpy array

dd= [[foo 0.567 0.611]
     [bar 0.469 0.479]
     [noo 0.220 0.269]
     [tar 0.480 0.508]
     [boo 0.324 0.324]]
         


        

Answer 1

First, the vector of first elements is

dv = dd[:,0]

(python is 0-indexed)

Second, to walk the array (and store in a dict, for example) you write:

dc = {}
ind = 0 # this corresponds to the column with the names
for row in dd:
    dc[row[ind]] = row[1:]