Solved

loadtxt using numpy in python

Posted on 2011-09-28
1
839 Views
Last Modified: 2012-05-12
Hi

I have data files that has blocks of data (see the file attached). I need to read only the first block of data in to an array (index 0) using python, at this point i load all the data. I can do this by checking the value of idex in the array data after I load them, but I was wondering if there is any easy way to do this.

I use 'loadtxt' in numpy to load the data.


thanks in advance
~Prabath




admconstraints--hamiltonian.x.txt
0
Comment
Question by:Peiris
1 Comment
 
LVL 2

Accepted Solution

by:
wmatos earned 500 total points
ID: 36814435
In the simplest of cases, a call like:
 
  mylist = [line.split(DELIMITER)[0] for line in open(FILENAME,'r')]

However, I noticed that your file has some other data you'll want to exclude.  Therefore, you'll have to be a little more selective by adding an if at the end... like:

  mylist = [line.split(DELIMITER)[0] for line in open(FILENAME, 'r') if not line.startswith('#')]
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Here I am using Python IDLE(GUI) to write a simple program and save it, so that we can just execute it in future. Because when we write any program and exit from Python then program that we have written will be lost. So for not losing our program we…
Sequence is something that used to store data in it in very simple words. Let us just create a list first. To create a list first of all we need to give a name to our list which I have taken as “COURSE” followed by equals sign and finally enclosed …
Learn the basics of modules and packages in Python. Every Python file is a module, ending in the suffix: .py: Modules are a collection of functions and variables.: Packages are a collection of modules.: Module functions and variables are accessed us…
Learn the basics of while and for loops in Python.  while loops are used for testing while, or until, a condition is met: The structure of a while loop is as follows:     while <condition>:         do something         repeate: The break statement m…

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question