On Sun, Aug 22, 2010 at 1:31 PM, Dirk Nachbar <dirk...@gmail.com> wrote:
> Here is a function which takes any list and creates a freq table,
> which can be printed unsorted, sorted by cases or items. It's supposed
> to mirror the proc freq in SAS.
>
> Dirk
>
> def freq(seq,order='unsorted',prin=True):
> #order can be unsorted, cases, items
>
> freq={}
> for s in seq:
> if s in freq:
> freq[s]+=1
> else:
> freq[s]=1
>
The above code can be replaced with this:
freq = {}
for s in seqn:
freq[s] = freq.get(s,0) + 1
> if prin==True:
> print 'Items=',len(seq),'Cases=',len(freq)
> print '------------------------'
> if order=='unsorted':
> for k in freq.keys():
> print k,freq[k],float(freq[k])/len(seq)
> elif order=='cases':
> #http://blog.client9.com/2007/11/sorting-python-dict-by-
> value.html
> freq2=sorted(freq.iteritems(), key=lambda (k,v):
> (v,k),reverse=True)
> for f in freq2:
> print f[0],f[1],float(f[1])/len(seq)
> elif order=='items':
> for k in sorted(freq.iterkeys()):
> print k,freq[k],float(freq[k])/len(seq)
> print '------------------------'
> return freq
>
> #test
>
> import random
>
> rand=[]
> for i in range(10000):
> rand.append(str(int(100*random.random())))
>
> fr=freq(rand)
> fr2=freq(rand,order='items')
> fr2=freq(rand,order='cases')
> --
>
I feel the code you wrote is bloated a bit. You shall definately give
another try to improvise it.
> http://mail.python.org/mailman/listinfo/python-list
>
--
~l0nwlf
--
http://mail.python.org/mailman/listinfo/python-list
