Re: Generate a sequence of random numbers that sum up to 1?

. My sole purpose is to test the predicting power of an HMM, given a set of parameter values. I will definitely try out your snippet and see if it works. Thanks a lot! --- Alex Martelli <[EMAIL PROTECTED]> wrote: > Anthony Liu <[EMAIL PROTECTED]> wrote: >... > > As

Re: Generate a sequence of random numbers that sum up to 1?

matter of fact, given that we have to specify the number of states for an HMM, I would like to create a specified number of random floating numbers whose sum is 1.0. --- Edward Elliott <[EMAIL PROTECTED]> wrote: > Anthony Liu wrote: > > But, I want the random numbers just gen

Generate a sequence of random numbers that sum up to 1?

I am at my wit's end. I want to generate a certain number of random numbers. This is easy, I can repeatedly do uniform(0, 1) for example. But, I want the random numbers just generated sum up to 1 . I am not sure how to do this. Any idea? Thanks. _

Re: How do you guys print out a binary tree?

Hi, Bayer Munich, I implemented a syntax parser from bottom up using a CNF grammar. I actually know what part of the triangle of the matrix I need to turn into a tree, but it is kinda hard to describe in text. So, I just made it easy by giving a triangle of the matrix. Anyway, thanks for your h

Re: How do you guys print out a binary tree?

Hi, Dave, That looks nice, I'll definitely try it out. --- Dave Hansen <[EMAIL PROTECTED]> wrote: > On Tue, 18 Apr 2006 08:17:22 -0700 (PDT) in > comp.lang.python, Anthony > Liu <[EMAIL PROTECTED]> wrote: > > > > > > >--- bayerj <[EMAIL PROT

Re: How do you guys print out a binary tree?

--- bayerj <[EMAIL PROTECTED]> wrote: > Hi, > > > 1 2 3 4 5 > > 0 7 8 9 10 > > 0 0 13 14 15 > > 0 0 0 19 20 > > 0 0 0 0 25 > > Look at the triangle represented by the non-zero > > integers. This triangle is a binary tree if we > take 5 > > as the root and w

How do you guys print out a binary tree?

There are many ways to represent a binary tree on an ascii screen. 1 / \ 2 3 / \ / \ 4 5 6 7 or 4---2---1 | | 56- 3 | 7 Suppose I have a function that takes a matrix like this one:

Re: Slicing matrix

Hi, James, I just realized that my English is so good that I can joke with slangs. Hopefully it isn't that offensive. Otherwise, I am sorry. --- James Stroud <[EMAIL PROTECTED]> wrote: > Anthony Liu wrote: > > I figure it out, too. NumArray is so flexible, > it's

Re: Slicing matrix

Hi, Robert, Thanks a lot. I figure it out, too. NumArray is so flexible, it's like cutting the cheese. You can cut it anyway you want. I really like NumArray. --- Robert Kern <[EMAIL PROTECTED]> wrote: > Anthony Liu wrote: > > I am using numarray. > > I will be

Slicing matrix

I am using numarray. Suppose I have >>> p = array(range(25), shape=(5,5)) >>> p array([[ 0, 1, 2, 3, 4], [ 5, 6, 7, 8, 9], [10, 11, 12, 13, 14], [15, 16, 17, 18, 19], [20, 21, 22, 23, 24]]) How do I easily slice out [0,1,2] or [1,2,3] or [2,7,12] or [7,12,17]

Re: Changing values of 1st column of a matrix using take(mymatrix, (0, ), axis=1)

Thanks, Tim, that is really cool. I know there must be some convenient way of doing this. --- Tim Hochberg <[EMAIL PROTECTED]> wrote: > Anthony Liu wrote: > > I am talking about the 'take' method of numarray. > > > > See here for more info: > >

Changing values of 1st column of a matrix using take(mymatrix, (0, ), axis=1)

I am talking about the 'take' method of numarray. See here for more info: http://stsdas.stsci.edu/numarray/Doc/node33.html If I initialize a matrix 'mymatrix' by zeros((3,3), type="Float64"), I get a 3*3 matrix of all zeros. Look: >>> from numarray import * >>> mymatrix = zeros((3,3), type="Fl

One module cannot be found by the interpreter

I downloaded and built the python/c++ maxent package ( http://homepages.inf.ed.ac.uk/s0450736/maxent_toolkit.html ). I don't know what happened, the interpreter cannot find the cmaxent module, whereas cmaxent.py is right under the current directory. >>> from maxent import * cmaxent module not fo

Problem with the maxent package

First of all, thank all of you who guided me through the readline library for enabling bash-like python interpreter. This has been taken care of nicely. I am trying to use the maxent package written by Zhang Le from here: http://homepages.inf.ed.ac.uk/s0450736/maxent_toolkit.html#download The b

Re: How to enable bash mode at the interative mode?

t know how to install the readline module. I tried what was suggested from the newsgroup, but got an error at make: make: *** [Modules/readline.o] Error 1 Thanks --- Carl Friedrich Bolz <[EMAIL PROTECTED]> wrote: > Anthony Liu wrote: > > That is, at the Python interactive mode,

How to enable bash mode at the interative mode?

That is, at the Python interactive mode, if I hit the upper arrow key, it'll bring up the last line of code. At http://groups.google.com/group/comp.lang.python/browse_thread/thread/fb8c2fd9eed0d/736fac8c33e84d0c?lnk=st&q=python+%22upper+arrow%22&rnum=2&hl=en#736fac8c33e84d0c , it seems that Michae

An interesting question about "print '\a'"

We know that if we do print '\a' the bell will sound. Now, why do I hear the sound on my local machine when I run a python script on a remote host? I understand if I hear it when I do print '\a' on my local machine. Does the command get sent back to the client machine? Thanks. ___

Problem splitting a string

I have this simple string: mystr = 'this_NP is_VL funny_JJ' I want to split it and give me a list as ['this', 'NP', 'is', 'VL', 'funny', 'JJ'] 1. I tried mystr.split('_| '), but this gave me: ['this_NP is_VL funny_JJ'] It is not splitted at all. 2. I tried mystr.split('_'), and this gave me:

Problem processing Chinese

I believe that topic related to Chinese processing was discussed before. I could not dig out the info I want from the mail list archive. My Python script reads some Chinese text and then split a line delimited by white spaces. I got lists like ['\xbc\xc7\xd5\xdf', '\xd0\xbb\xbd\xf0\xbb\xa2', '\

Re: Importing some functions from a py file

O, sorry, I did have main() at the very end of code1.py. Sorry for this confusion. --- John Machin <[EMAIL PROTECTED]> wrote: > On Tue, 19 Apr 2005 20:17:06 -0700 (PDT), Anthony > Liu > <[EMAIL PROTECTED]> wrote: > > >The choice is (b): > > > >(b)

Re: Importing some functions from a py file

I add to the end of code1.py module the following, if __name__ == "__main__": main() I should be OK, right? --- John Machin <[EMAIL PROTECTED]> wrote: > On Tue, 19 Apr 2005 19:13:13 -0700 (PDT), Anthony > Liu > <[EMAIL PROTECTED]> wrote: > >I think I

Re: Importing some functions from a py file

; wrote: > On 4/19/05, Anthony Liu <[EMAIL PROTECTED]> > wrote: > > > > You are certainly right, because I don't know how > to > > protect the main functions. Where do I put > > > > if __name__ == '__main__': main() > > I just

Re: Importing some functions from a py file

--- Michael Soulier <[EMAIL PROTECTED]> wrote: > On 4/19/05, Anthony Liu <[EMAIL PROTECTED]> > wrote: > > But every time, I run code2.py, the main() of > code1.py > > is run. > > You probably did not protect your main function in > both modules. >

Importing some functions from a py file

Hi, I think I got confused by the python import facility. Say, in code1.py I have func1, func2, func3 and main. In code2.py, I *only* want to use func2 from code1.py. So, I did from code1 import func2 But every time, I run code2.py, the main() of code1.py is run. I don't know why. Any hint

Read from the last line of a file?

Normally when we do line = in_file_obj.readline() we read from the first line of a file. I am wondering if it is possible to start reading from the last line of file, and then the last but one up to the first line. __ Do You Yahoo!? Tired of spa

Re: sorting a dictionary?

--- Scott David Daniels <[EMAIL PROTECTED]> wrote: > Anthony Liu wrote: > > mydict = {'the':358, 'they':29, 'went':7, > 'said':65} > > Is there an easy to sort this dictionary and get a > > list like the followin

sorting a dictionary?

I have a dictionary which contains some words and their frequency in a short novel. It looks like this: mydict = {'the':358, 'they':29, 'went':7, 'said':65} Is there an easy to sort this dictionary and get a list like the following (in decreasing order)? the 358 said 65 they 29 went 7 Tha

RE: convert a list to a string?

Oh, yes, that's a cool function! I did that before but have forgotten. Thanks a lot! --- Tony Meyer <[EMAIL PROTECTED]> wrote: > > Suppose I have a list > > > > myList = ["this", "is", "a", "sample", "list"] > > > > If I don't want to iterate through it and > concatenate > > the list elements

convert a list to a string?

Suppose I have a list myList = ["this", "is", "a", "sample", "list"] If I don't want to iterate through it and concatenate the list elements, how do I easily convert it to a string like "this is a sample list" str(myList) will only give you things like "["this", "is", "a", "sample", "list"]"

Re: Is it possible to specify the size of list at construction?

t;[EMAIL PROTECTED]> wrote: > Anthony Liu wrote: > > I cannot figure out how to specify a list of a > > particular size. > > > > For example, I want to construct a list of size > 10, > > how do I do this? > > > A list does not have a fixed size (as

Is it possible to specify the size of list at construction?

I cannot figure out how to specify a list of a particular size. For example, I want to construct a list of size 10, how do I do this? __ Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. http://promotions.yahoo.com/new_mail -

Is it possible to pass a parameter by reference?

I defined two functions, f1 and f2. f1 modifies the value of a variable called apple. I want to pass the modified value of apple to f2. How can I do this? I got stuck. __ Do you Yahoo!? Yahoo! Mail - You care about security. So do

Re: Which module is "set " in?

Thanks a lot, mine is Python 2.3, and from sets import Set as set works great! --- Steven Bethard <[EMAIL PROTECTED]> wrote: > Anthony Liu wrote: > > I want to use the set function like > > > > mylist = ['a', 'b', 'b', &#

Which module is "set " in?

I want to use the set function like mylist = ['a', 'b', 'b', 'd', 'e', 'a'] myset = set (mylist) But I don't know what to import, I tried sys, sets, they don't work. What's the easy way to find out the module that contains a particular function? __