Dear All,
I hope all is well.
I am trying to do a penalized cox regression analysis in Python.
However, in order for the function to work, the "event" and "time"
need to be stored as a structured array
similar to:
array([( True, 72.), ( True, 411.), ( True, 228.),.........,dtype=[('event', '?'), ('time', '
Use R it's so much easier. See the attachment. Best wishes David Booth
Python is extremely efficient in handling any arbitrarily complex structures of data (matrices, vectors, arrays of any dimensions).
In Python you can have lists of dictionaries, dictionaries of lists, dictionaries of dictionaries and lists of lists, and so on.
I am not sure what you're trying to do, but to track time (duration actually), you can use the module time (import time).
Here are some examples of a list of list:
L=[ [1,2,3], ['a',b','c'], [5,6,-10], {"Monday":2}]
As you can see, a list is simply a set, with elements that can be anything. The last element of this list is a dictionary with a single element. Dictionaries are useful because they are the data structure used by Json (JavaScript output notation) files.
Here's a longer dictionary:
d = {}
d['Monday']=1
d[Tuesday']=2 =>
d= {'Monday':1 , 'Tuesday':2}
A dictionary is nothing but a function (better yet, a relation in mathematics, like a Venn diagram).
Hope that helps on your first steps.
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