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Rectifying Java recursive code for Backtracking Graph Coloring Algorithm

stackoverflow.com - 2012-03-18 19:04:36 - Similar - Report/Block

The problem is to use Recursion to color a given graph with minimum number of colors such that no adjacent vertices can have the same color.The function signature is static String exhaustive(int color, String prefix) where color is the number of colors being used in that iteration and prefix is string consisting of the color for each node...

[Løst] Hjelp med recursive backtracking

diskusjon.no - 2013-04-07 16:36:54 - Similar - Report/Block

Hei, har nå i oppgave å løse en sudoku via brute-force. Så vidt jeg vet, er den beste måten å bruke recursive backtracking, siden du må ha muligheten til å kunne bevege deg bakover om du finner ikke-løsbare ruter. Har prøvd litt på dette nå, og får det ca. til å funke, og det ser slik ut hittil: Med rad-og kolonnenummer: Spoiler http://pa...

Java Graph library which supports generic graph formats such as GraphML or GraphVIZ etc

stackoverflow.com - 2012-04-23 12:20:14 - Similar - Report/Block

I am using Antlr (with Java) to parse some programs. I need to construct a graph out of parsed information. Later I want to run graph-algorithms on it which are already written in C++. Right now I am using xml to dump the parsed information into a graph like data-structure. Then I have to parse this XML using c/c++ to make a native graph.

Can 15 puzzle really be solved by backtracking?

stackoverflow.com - 2013-06-11 15:17:27 - Similar - Report/Block

Recently I was reading a book called "Programming Challenges". It is basically a book about algorithms. One of the chapters of the book is devoted to a backtracking technique and at the end of the chapter there are example problems from the UVA Online Judge. One of the problems is the famous 15 puzzle Even though this problem is introduce...

Clojure: Can only recur from tail position

stackoverflow.com - 2012-06-02 18:47:08 - Similar - Report/Block

I'm trying to recursively reverse a list, but am getting Can only recur from tail position upon run. What does this mean precisely and how can my code be improved so it works? (defn recursive-reverse [coll] (loop [coll coll] (if (< (count coll) 2) '(coll) (conj (first coll) (recur (rest coll))) ))) Output for Oscar's solution. It...

Recursive Function with If-Else Statements in Prolog

stackoverflow.com - 2012-04-22 05:04:20 - Similar - Report/Block

I'm trying to write a recursive function in prolog that computes R = (2*X + Y)^N without using the exponent operator. I've written a recursive function with if-else statements and I get the error: ") or operator expected." It looks to me like I have the syntax correct, but I must be missing something. The code is below. expbar(R, X, Y, N)...

how to import matplotlib in python

stackoverflow.com - 2012-08-05 12:04:13 - Similar - Report/Block

I am new to python and I am working on a graph problem and I want to draw this graph to have a better understanding of it. I learnt that matplotlib module is supposed to be imported for this but I dont know how to add it to the project.(I am a java developer and It is pretty much like adding jar to your classpath) Can anyone help me with...

LD_PRELOAD variable in JNI code

stackoverflow.com - 2012-04-19 10:17:14 - Similar - Report/Block

My java code calls via JNI some C++ code from a shared library (eg libtest.so). The code is instrumented with some special debugging symbols that exist it libdebug.so. When I call LD_PRELOAD=/usr/lib/libdebug.so java com.test.myMain the execution stops with Exception in thread "main" java.lang.UnsatisfiedLinkError because symbols from lib...

Using Graph# for drawing graph

stackoverflow.com - 2012-04-09 00:20:11 - Similar - Report/Block

I want to draw a graph like the one i've attached here: I dont wanna re invent the wheel and start to draw circles and so on, so i googled for libraries and what i found is Graph#. Unfortunately there is no documentation/tutorial, so i'm a little confused that is this what i need or not! What I need is to be able to choose colors for vert...

Error: Could not find or load main class

stackoverflow.com - 2011-09-20 13:10:12 - Similar - Report/Block

I am having trouble compiling and running my Java code, intended to allow me to interface Java with a shared object for Vensim, a simulation modeling package. The following code compiles without error: javac -d . -cp ./apache-log4j-1.2.16/log4j-1.2.16.jar:. /vensim.jar SpatialModel.java VensimHelper.java VensimException.java VensimContextR...

Automatically convert Scala code to Java code

stackoverflow.com - 2012-03-27 00:28:25 - Similar - Report/Block

I have an app written in Scala and some of my team members want a Java version of it. It is a demo app to use another API written in Scala, and they want a Java version of the app to be able to use the API from Java. However, the app is somewhat large and I don't want to manually rewerite in Java (and they don't want to learn Scala). Is t...

Merging array in recursive function using php?

stackoverflow.com - 2012-03-18 16:14:46 - Similar - Report/Block

After one week searching and converting many algorithm from other language into php to make an array that contain "combination k from n". I'm stuck. please help me. This is my code (using php): function comb($item,$arr,$out, $start, $n, $k, $maxk) { if ($k > $maxk) { foreach($arr as $ar){ echo "$ar"; echo "...

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How can I put axis on a .png file in java?

stackoverflow.com - 2012-03-23 18:06:32 - Similar - Report/Block

I have chart.png with data in it that I would like to put a simple X - Y axis on with some labeling. I also would like to try not to use any external software that doesn't come with java. I'm allowed to use jfreechart but if there is a way to make it look nice, while just using some plan java code, that would be better. Does anyone ha...

Graph API iOS picture

stackoverflow.com - 2012-05-06 21:42:30 - Similar - Report/Block

I have a graph api call from my ios application. It looks something like this: [[appDelegate facebook] requestWithGraphPath:[NSString stringWithFormat:@"%i/picture", [[userData objectForKey:@"id"] intValue] andDelegate:self]; (might be some typos) But in the request did load when i nslog the result, it is (null) . Graph API says that you...

Recursive solution to Sudoku generator

stackoverflow.com - 2012-03-31 21:55:29 - Similar - Report/Block

I'm trying to code an algorithm that creates a legal Sudoku board in either Java or Javascript. Neither work, and I'm not entirely sure why. Java: http://pastebin.com/FeBbE19R Javascript: http://pastebin.com/KGpqCnxL Essentially, the problem in both programs is that either x or y is getting incremented more than it should (skipping the s...

How can you emulate recursion with a stack?

stackoverflow.com - 2012-03-22 23:45:31 - Similar - Report/Block

I've heard that any recursive algorithm can always be expressed by using a stack. Recently, I've been working on programs in an environment with a prohibitively small available call stack size. I need to do some deep recursion, so I was wondering how you could rework any recursive algorithm to use an explicit stack. For example, let's sup...

Algorithm to map graph into another structure

stackoverflow.com - 2013-03-26 15:14:42 - Similar - Report/Block

I am trying to map a graph structure into the structure I show below. Here is an example of the type of graph I need to map where arrows always have a direction from left to right. Here is the result I am looking for. The goal is to generate an XML like this: Is there any algorithm I can use? I don't think it's relevant but I am parsing J...

Prolog predicate to generate integers above X on backtrack

stackoverflow.com - 2012-04-26 17:34:49 - Similar - Report/Block

Write a predicate above(L, N) that will generate (on backtracking) each of the integers larger than a given integer, . For example, the goal above(3, N) should generate as solutions N = 4; N = 5; N = 6; ... , and so on in order on backtracking. As above. A general strategy for "generating solutions on backtrack" would be great too.

very wierd! eclipse does not find java on my computer?

java-forums.org - 2012-07-22 05:57:18 - Similar - Report/Block

Hello I am very new and I have a problem that has been bothering me all day today. I have been working on a ROS (robotic OS) and I am using java for part of it. The java code itself works fine, but I just updated my java to the latest java and my whole entire eclipse can not find java... even programs like minecraft do not work. I did che...

iPhone - ECGraph plots my graph as a single line on Y axis

stackoverflow.com - 2012-04-24 11:11:57 - Similar - Report/Block

I am using Xcode 3.2.3 with iOS 4 SDK. I am preparing a small app for plotting values on a graph. To this end I have used the ECGraph library. I downloaded the sample app and tuned it a bit to suit my purposes. I want the graph to plot time on the X-axis in hours and a simple int value on the Y-axis. My problem: When I do select the optio...

Launching CYGWIN-built executable from Java on Windows 7 fails with "error while loading shared libraries: ?: No such file or directory"

stackoverflow.com - 2012-04-10 18:32:00 - Similar - Report/Block

The code in question has worked in more or less the exact same configuration on earlier releases of Windows, however, it is not known to have run on Windows 7 YET! That's what I need to solve now. Briefly, some C code performs some configuration and security checks before launching a java program, passing some data that would be neigh-int...

PDF/A1A (XMP Tagged PDF) with XML datasource (JaserReports/iText)

java-forums.org - 2012-08-14 09:40:53 - Similar - Report/Block

Hello, I'm trying to run the code underneath, but it fails with the error: Code: Exception in thread "main" java.lang.ClassCastException: com.itextpdf.text.Document cannot be cast to org.w3c.dom.Document Here's the actual code. It seems that I'm combining two different Document classes, but I don't know how to solve it. If my co...

Can't run Java example for Selenium / WebDriver

stackoverflow.com - 2012-04-07 20:29:58 - Similar - Report/Block

Having a problem getting going with Selenium on Java. I'm trying to follow the example on this page: http://code.google.com/p/selenium/wiki/G ettingStarted I'm typing this: $ javac -cp . -cp ~/Downloads/selenium-2.20.0/selenium-jav a-2.20.0-srcs.jar -cp ~/Downloads/selenium-2.20.0/selenium-jav a-2.20.0.jar -g Example.java And getting this:...

How to compile java code from a .net application?

stackoverflow.com - 2012-06-27 12:06:46 - Similar - Report/Block

I am creating a source code editor for Java using C# in .NET 4. I need to know how I can interact with the jre to compile the java code on my application editor interface from .net. I wish to display the user any errors on the code as well. Any ideas on how to accomplish this will be greatly appreciated.

Platform independent socket communication between Java and C++

java-forums.org - 2013-06-12 00:34:38 - Similar - Report/Block

Hello forum, I would like to build a simple Java server that can receive TCP messages from different endpoints that use Java, C++ or any other language. As far as I know the following message properties are critical: byte order, encoding and number representation. However, I don't know which Java Streams and Writers write Java specific co...

How to change iReport font as parameter

java-forums.org - 2013-03-27 09:17:00 - Similar - Report/Block

i have application that generate report with custom font style, like font family, color,size and style(bold,italic,underline). And i use all font-family from Windows System. I try to use parameter in .jrxml file. Like this : Code: And in the text : Code: ... ... When i preview in iReport, it log error : Code: Error filling print... Font '...

C - Manage call stack in recursive methods

stackoverflow.com - 2012-04-04 01:30:00 - Similar - Report/Block

I am new here and I have a problem that's bugging me.I am a beginner so please don't laugh at me. I want to make recursive quicksort work on a large number of elements,let's say 100000.I know this will cause the stack to overflow.I have been googling for the past few days trying to find a way to manage the call stack.I can't really find a...

Lucene.net throws out of memory Exception

stackoverflow.com - 2012-05-17 18:25:16 - Similar - Report/Block

I have been working with Lucene .Net interface to operate with Lucene Java libraries. However, lately, I jave been experimenting some out of memory problems which are not related to the Systems RAM Memory (12 GB). I bet that the point is that the JVM that runs Lucene which does not allocate enough memory to perform the operations. The poi...

nil can't be coerced into Fixnum Error

stackoverflow.com - 2012-02-23 06:04:10 - Similar - Report/Block

I'm banging my head over a piece of code after upgrading to Ruby 1.9.3. It works fine in Ruby 1.8.7. The code greps a process and fetches the "rsize" value for that process, stores it in a file and then plots a graph. But in ruby 1.9.3 I keep getting this error: ERROR TypeError: nil can't be coerced into Fixnum SVG/Graph/Graph.rb:375:in...

Gaia Framework AS3: Can't use the Facebook Graph API

stackoverflow.com - 2012-06-25 04:05:17 - Similar - Report/Block

I'm trying to include a Facebook app in a section of a Flash website developed in GAIA Framework. I've followed many examples and tutorials and everytime I've tried to do a simple login on the Nav Page. My imported classes (ALL of the facebook api?): import com.adobe.serialization.json.JSON; import com.facebook.graph.Facebook; import com.

Graph visualization code in javascript?

stackoverflow.com - 2008-08-10 04:07:52 - Similar - Report/Block

Hi. I have a data structure that represents a directed graph, and I want to render that dynamically on an HTML page. Does anyone know of any javascript code that can do a reasonable job with graph layout? These graphs will usually be just a few nodes, maybe ten at the very upper end, so my guess is that performance isn't going to be a big...

MATLAB: How do I graph multiple functions on the same graph?

stackoverflow.com - 2013-05-09 05:26:18 - Similar - Report/Block

How can I graph multiple functions on the same graph/plot/Cartesian plane on MATLAB with domain and range restrictions? For example I made up the following functions below. How would I graph the following on the same graph within MATLAB? Function 1: x = -3 for 10 <= y <= 14 Function 2: y = -2x for -5 <= x <= -4 Function 3: (x-0)^2 + (y-12...

Using continuation / CPS to implement tail-recursive MergeSort in OCaml

stackoverflow.com - 2013-02-25 16:41:58 - Similar - Report/Block

I am trying to implement a tail-recursive MergeSort in OCaml Since Mergesort naturally is not tail-recursive, so I am using CPS to implement it. Also my implementation is inspired by Tail-recursive merge sort in OCaml Below is my code let merge compare_fun l1 l2 = let rec mg l1 l2 acc = match l1, l2 with | ([], []) -> List.rev acc...

graph-tool: how to access properties?

stackoverflow.com - 2012-03-02 02:34:13 - Similar - Report/Block

I would like to store instances of a class in a graph-tool graph, one object per node (or 'vertex' as graph-tool calls them). I am trying to use a vertex property as that seems to the be the way to do this def MyClass(object): def __init__(self, title): self.title = title graph = Graph() my_obj = MyClass('some title') vertex...

How should I get Open Graph JSON object to pass in facepy class

stackoverflow.com - 2012-07-14 18:33:16 - Similar - Report/Block

I am trying to configure Open Graph in my app such that, when ever a person click a "link" in it, the app should "post" it on his feeds/ timeline/ activity. ( I created open graph actions for these features and successfully added meta tags in the page So, I am using fandjango facepy to do this job. This is how my code looks.. from facepy...

Element no longer draggable after first successful drag, using JQuery

stackoverflow.com - 2013-04-22 13:03:37 - Similar - Report/Block

I have seen many variations of this question asked and answered before, but none seemed to fit what I was doing, or I didnt understand the answers and they were no longer commentable. So I produced the following fiddle to demonstrate a portion of my code to illustrate my problem. JSFiddle Link I have a list of lines of text which describe...

Plotting two points entered by the user into a graph in java

stackoverflow.com - 2013-02-15 03:06:00 - Similar - Report/Block

basically I have to ask the user to enter two points and then display the equation in point slope form using those points, then I have to code in a graph that displays those points. I have already done and coded the first part which looks like this: import java.util.*; import java.text.*; public class Proj3 { public static void main(Stri...

How to regenerate the .class file while loading the graph through jnlp file

stackoverflow.com - 2013-04-17 10:21:59 - Similar - Report/Block

Here is my Code: Graph Applet Demo Graph Applet Blockquote My objective is to get the new copy of class file while loading the all jar file. Every time i close the browser and open it i should get the new class copy...

Sixth form Graph Transformations

thestudentroom.co.uk - 2013-05-04 10:30:55 - Similar - Report/Block

Take for the example the line y=x where y=f(x). If you were asked to sketch the graph of y=4-f(x). What do you do first? Multiple the y coordinates by -1, effectively reflecting the graph in the x-axis then add four to the y values??...

سورس برنامه N وزیر با استفاده از الگوریتم BackTracking

barnamenevis.org - 2013-05-10 10:37:56 - Similar - Report/Block

با سلام خدمت همه دوستان سورس برنامه N وزیر به زبان #C با استفاده از الگوریتم BackTracking رو خودم طراحی ونوشتم امیدوارم برای شما هم مفید باشه با آرزوی موفقیت برای همه................... لینک دانلود: http://uplod.ir/2sglis31lz71/Nqueen.zip. htm اگه لینک احتمالاً وقتی به مشکل خورد به havakili63@yahoo.com یه ایمیل بزنید تا واستون بفرستم فایل...




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