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Full Discussion: Perl Array help
Top Forums Shell Programming and Scripting Perl Array help Post 302646275 by balajesuri on Friday 25th of May 2012 12:10:52 AM
Old 05-25-2012
Few questions:

Quote:
Originally Posted by dets34
RANDOM TEXT
RANDOM TEXT
Node # x pos ypos zpos
5948 50.24 125.35 5.79
(there are over 200 lines of this data)
RANDOM TEXT
RANDOM TEXT
1. Please post few lines from the input file spanning few lines from random text, few lines of node data, and few more lines of random text. The simplest way to loop through the nodes and positions is by checking if the line starts with a number (unless no other random text starts with a number too)

Quote:
Originally Posted by dets34
i need to somehow open this file, grab the data for Node, x position, y pos, and z pos and from this data be able to calculate which node is closest to a given position by a user defined input.

so if the user enters a position of lets say 10 for the x pos, 10 for the y pos, and 10 for the z pos. (just keeping it simple) the code needs to be able to loop through the data and find the node with the closest corresponding positions.
2. When you say grab the closest point, do you mean the point from file nearest to the user inputted data:
dist = sqrt ((x_input - x)^2 + (y_input - y)^2 + (z_input - z)^2)
 

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XPath::Node::Element(3) 				User Contributed Perl Documentation				   XPath::Node::Element(3)

NAME
Element - an <element> API
new ( name, prefix ) Create a new Element node with name "name" and prefix "prefix". The name be "prefix:local" if prefix is defined. I know that sounds wierd, but it works ;-) getName Returns the name (including "prefix:" if defined) of this element. getLocalName Returns just the local part of the name (the bit after "prefix:"). getChildNodes Returns the children of this element. In list context returns a list. In scalar context returns an array ref. getChildNode ( pos ) Returns the child at position pos. appendChild ( childnode ) Appends the child node to the list of current child nodes. getAttribute ( name ) Returns the attribute node with key name. getAttributes / getAttributeNodes Returns the attribute nodes. In list context returns a list. In scalar context returns an array ref. appendAttribute ( attrib_node) Appends the attribute node to the list of attributes (XML::XPath stores attributes in order). getNamespace ( prefix ) Returns the namespace node by the given prefix getNamespaces / getNamespaceNodes Returns the namespace nodes. In list context returns a list. In scalar context returns an array ref. appendNamespace ( ns_node ) Appends the namespace node to the list of namespaces. getPrefix Returns the prefix of this element getExpandedName Returns the expanded name of this element (not yet implemented right). string_value For elements, the string_value is the concatenation of all string_values of all text-descendants of the element node in document order. toString ( [ norecurse ] ) Output (and all children) the node to a string. Doesn't process children if the norecurse option is a true value. perl v5.16.2 2003-01-26 XPath::Node::Element(3)
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