Shortest path which includes all subset
In graphs (V,E) with negative edge weights but with no negative cycles , X <V and s, t in V .I need an algorithm to decide if exist in the graph ,shortest path from s to t with which includes all the nodes from X
Unfortunately the problem you are trying to solve in NP-complete (it means that the best known algorithm for doing this is exponential in time with respect to size of X) so the best solution is to check every possibility. But if your graph has some special form there may be efficient solution for this problem. In general it's special case is finding [Hamiltonian path|http://en.wikipedia.org/wiki/Hamiltonian_path].
Similar Messages
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hi
if nyone cud give me the code for finding the shortest path between 2 points but in this case all the paths have equal weights i.e. the shortest path would be the involvement of minimum number of nodes between the start & the end node.
Please am stuck up if anyone can provide me with the code.
Thanks in advanceRelated to Dijkstra's shortest path algorithm if all edges have equal
weight, just the heap management (priority queue) will be much simpler.
If the graph to be traversed isn't too big, a simple linear array could do the
job fine where entry i indexes paths of length i. Nothing much else is to
be gained though: it stil will be a permanent graph labeling algoritm.
kind regards,
Jos -
I'm using MS Visual Studio C++ 2008 Express. I've included all the paths to the DLL, "visa32.dll" but the LoadLibrary("visa32.dll") call returns the statement that can't convert character string to LPCSTR (pointer). I ran the same code with the Portland Group compiler (which I no longer have) and there was not a problem accessing the DLL. Is there some requirement for the C++ 2008 Express compiler that needs to be met?
Hello jterry,
If you compile as Unicode you need to pass Unicode strings to
Win32 APIs which have LPTSTR or LPWSTR string.
When you want to write code compilable for Unicode
and Ansi just enclose all string constants in _T(). In your case:
LoadLibrary(_T("visa32.dll"))
You can look at this post on the microsoft discussion forums for more information. Have a great day.
O. Proulx
National Instruments
www.ni.com/support -
How to configure Team explorer 2010 command-line tool in Mac x os.
Hot to configure shell or system path to include the folder to which (TF client) unzipped archive available. I am new to Mac X OS. Please help.Dmitry,
Thanks for the great writeup!
I think I've got my universal instant client libraries built correctly.
I too am using MacBook Pro but I'm getting stuck at building the 32 bit oci8.so
First problem is my pecl download (ver 1.4.1) did not contain a "configure" file so ./configure failed.
I used configure from /sw/....... to try to continue.
Second problem. Using existing configure from /sw/.... I used an appropriate variation of your example command
(./configure --with-oci8=instantclient,/usr/local/oracle/instantclient_10_2 && make).
Things look like everything ran OK but The output does NOT include an oci8.so file
So I guess my question is: Which "configure" should I be using? And if it is not the one on the system under /sw/...
where would I get it since it doesn't come in the pecl download? -
Can I use my fully owned CS2 on my iMac OX 10.9.5 as I paid over $1850.00 some 7 years ago for it and have been told by "Experts" that I can reinstall from my original software disks (which I have including all passwords etc required. Please assist as when my old iMac died I find I could not get my CS2 to work. Very frustrating for some one my age who cannot afford a new InDesign. Thomas Bain
CS2 was created for the Power PC processor which your old iMac obviously was.
Your new Mac with OSX 10.9.5 is an Intel Mac and no longer runs Power PC applications.
For several years after the transition from Power PC to Intel Apple had provided an emulator called Rosetta that allowed Intel Macs to run Power PC applications.
However, the last version of the Mac OS that had Rosetta was OSX 10.6.8 Snow Leopard.
Even if you could find a copy of OSX 10.6.8 it would be highly unlikely that it would ever install on a newer Mac due to different firmware versions.
Your only hope is to buy an older used Mac that can run OS 10.6.8 Snow Leopard or earlier.
Sorry, but that ship has sailed. -
I did an auto software update on my iMac, which included a restart. When the machine restarted it's stuck with an Apple logo and spinning wheel. I've tried all of the key strokes that are supposed to work, but nothing has. Any suggestions?
Gray screen could be any number of things, bad third party at boot kext file, a bad Apple one, a bad install/upgrade of OS X, drive corruption etc.
Run through this list of fixes
Step by Step to fix your Mac -
Flex Gumbo - Library Path "Include all classes" includes ActionScript Files
I've added an "Actionscript File", i.e. a File with no package/class that is included in an actionscript class.
In FlexBuilder 3, since there was no option to include all classes, I could optionally choose actionscript files.
So, Make Flashbuilder's "include all classes" option to not include Actionscript Files by default.I opened a bug on jira.
http://bugs.adobe.com/jira/browse/FB-22228 -
Netbeans 551: Include all libs in project jar file. Possible?
Is it possible to manually, or automaticly, include the /dist/lib directory into my "GonioLabt,jar" to make it more 'stand alone', file wise.
Netbeans generates this dist/README.TXT
========================
BUILD OUTPUT DESCRIPTION
========================
When you build an Java application project that has a main class, the IDE
automatically copies all of the JAR
files on the projects classpath to your projects dist/lib folder. The IDE
also adds each of the JAR files to the Class-Path element in the application
JAR files manifest file (MANIFEST.MF).
To run the project from the command line, go to the dist folder and
type the following:
java -jar "GonioLab.jar"
To distribute this project, zip up the dist folder (including the lib folder)
and distribute the ZIP file.
Notes:
* If two JAR files on the project classpath have the same name, only the first
JAR file is copied to the lib folder.
* If the classpath contains a folder of classes or resources, none of the
classpath elements are copied to the dist folder.
* If a library on the projects classpath also has a Class-Path element
specified in the manifest,the content of the Class-Path element has to be on
the projects runtime path.
* To set a main class in a standard Java project, right-click the project node
in the Projects window and choose Properties. Then click Run and enter the
class name in the Main Class field. Alternatively, you can manually type the
class name in the manifest Main-Class element.Yes it is possible. The same question has been
killing me all day. Here is how I did it.
(I'm on Mac OS 10.4, but this should work anywhere)
Netbeans produces the following:
dist/myJar.jar
dist/lib/swing-layout-1.0.jar
I would prefer to have only:
dist/myJar.jar
But, as you know, myJar.jar requires the class files
stored in swing-layout-1.0.jar. I unpacked the jar
files and examined the manifest files. Here is how to
unpack and repack the jar files into a single jar
file:
First, I renamed myJar.jar to myJar.zip and let OS X
unarchive the jar for me. I did the same for
swing-layout-1.0.jar.
I then dropped the MANIFEST.MF file from
MyJar/META-INF/ into a new folder on my harddrive
Then, I dropped the package (its a folder full of
class files) from MyJar/ into the same new folder on
my harddrive.
At this point, the new folder contains:
/newFolder/MANIFEST.MF
/newFolder/myPackage/
Then, I grabbed /dist/lib/swing-layout-1.0/org/ and
dropped that into the new folder.
We now have in the new folder:
/newFolder/MANIFEST.MF
/newFolder/myPackage/
/newFolder/org/
Almost done:
Open the MANIFEST.MF file with a text editor. Mine
looked like this:
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.5
Created-By: 1.5.0_07-87 ("Apple Computer, Inc.")
Main-Class: ohm.GUI
Class-Path: lib/swing-layout-1.0.jar
X-COMMENT: Main-Class will be added automatically by
build
I replaced the ENTIRE contents of the file with
this:
Manifest-Version: 1.0
Main-Class: myPackage/Main
Where 'myPackage' is the folder containing my class
files, and 'Main' is the class containing the
'main(String[] args) method.
Save the file and we're ready to repack the archive.
Open the command line (in OS X this is the Terminal)
I assume the syntax is the same in windoze; Navigate
to the new folder you created.
In OSX: cd /newFolder
in windoze: cd \newFolder
Then use java's jar command:
jar cmf MANIFEST.MF MyJar.jar *
What this does:
jar is the command. cmf are flags: the 'c' is for
creating a new jar archive, the 'm' is to specify a
premade manifest file, the 'f' tells jar to write the
results to a file. MyJar.jar is the name you have
chosen for the resulting .jar file. the '*' is a
wildcard character that tells jar to put every file
in the present working directory into the new .jar
Thats it! This produced myJar.jar which worked fine
by itself, as it included all the classes from
swing-layout-1.0.jar. It would be a trivial matter to
write a shell script to do all this for you, unless
of course you use something silly like windows, in
which case you'll have to write a batch file or use
python or something. Good luck, I hope this saves
others time, drop me a e-mail if this was at all
confusing! [email protected]
You should be aware that doing this may well violate the licensing terms for third-party libraries
By the way, what's silly about using Windows? Are you saying you don't develop for Windows because it's "silly"? -
Revision: 12673
Revision: 12673
Author: [email protected]
Date: 2009-12-08 14:41:28 -0800 (Tue, 08 Dec 2009)
Log Message:
Integrating latest FXGUtils now that TLF 566 is in trunk (which includes a fix for TLF 2497992).
Changelist: 646928
Implementation-Title: FXG Compiler
Implementation-Version: 1.414471
BuildDate: 2009/12/04:03:06:24
Notes:
Made bitmap clipping implementation more efficient.
Bug(s) Fixed:
- #2491501 (Inconsistent word spacing results between MXMLC static and runtime compilation)
- #2492932 (MXMLC gets null pointer exception on this FXG)
- #2489341(FXG with a large BitmapImage results in a malformed SWF)
- Added code to break down straight edges whose dx or dy exceeds 65535 twips into smaller segments.
- #2495874 (many objects are missing in Opacity.fxg renders via MXMLC static compiler)
- FXGUtils now ignores gradient entries of more than 15 gradient entries.
- It logs warnings for such violations and continues processing.
QE notes: Yes, please remove whiteSpaceCollapse="preserve" from static FXG mustella test cases or please regenerate bitmaps.
Doc notes: N/A
Localization: No, there are just resource strings removed in this changelist, no new strings.
Bugs: N/A
Reviewer: Sujata
Tests run: Checkintests, mustella spark/core/fxg (25 failures all relating to tests that have whiteSpaceCollapse="preserve" but the reference bitmap do not expect this behavior and should be regenerated or tests modified).
Is noteworthy for integration: Yes
Modified Paths:
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/fxg/FXGException_en.properties
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/fxg/swf/FXG2SWFTranscoder.java
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/dom/AbstractFXGNode.java
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/dom/ContentPropertyNode.j ava
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/dom/TextNode.java
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/dom/fills/LinearGradientF illNode.java
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/dom/fills/RadialGradientF illNode.java
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/dom/filters/GradientBevel FilterNode.java
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/dom/filters/GradientGlowF ilterNode.java
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/dom/strokes/LinearGradien tStrokeNode.java
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/dom/strokes/RadialGradien tStrokeNode.java
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/sax/FXGSAXScanner.java
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/swf/ShapeHelper.java
Added Paths:
flex/sdk/trunk/modules/fxgutils/src/java/com/adobe/internal/fxg/dom/PreserveWhiteSpaceNod e.java -
Shortest Path Algorithm with Djikstra
Hi all,
im developing a shortest path searching techniques by using Djikstra's algorithm. My search space is very huge and it is about 100,000 nodes or we can call it Vertex. I store all the nodes and weight of edges in MySql as follows:
From | To | PathCost
A B 2
B A 2
A D 9
D A 9
B C 7
C B 7
B E 5
E B 5
C D 5
D C 9
Whenever the class receive any request from someone who want to go from point A to point Z, it will load the data from mysql by using "Select * FROM table WHERE From='Variable' ", and declare it as new Vertex, and perform the search. The reason i load it from MySql everytime i receive a new request is because any new node can be added to database anytime.
In a nut shell, im developing a system to search for a shortest path in real world, i represent buildings as a Vertex, and road as edges, any idea of what can i improve my current djikstra searching method or any new developement to reduce the running time to lowest??
regards,
howsenminimal spanning tree != shortest path...
Mr. Pike is indeed correct. Consider this simple example. arrange a bunch of dots around the rim of a circle. Consider the distance between them to be just the standard measure of distance in the plane. Assume that the points are fairly evenly spaced, but not exactly evenly spaced.
The minimal spanning tree, which you got by first joining the two closest points and then the next two, and then by joining more points to that structure, will end up looking like a letter C going around the circle and leaving a gap between the two points that were the furthest apart on the circle.
Every point connects to every other point, possibly by passing through other points and it is minimal because it left out the widest gap.
On the other hand, the quickest way to get from one tip of the C to the other tip is to go straight from the one to the other, not to walk all the way around the circle following a path that goes through every single other point in the system.
Reducing a graph to a minimal spanning tree, gets you a single subgraph of the original grpah that has the least total distance. That, unfortunately, has nothing to do with telling you the fastest way to get from point A to point B traveling along the original graph.
hence minimal spanning tree != shortest path... -
Hi,
I need a little help.
I am performing routing on geodatic data (i.e., locations with Lat/Long).
I think the AStar shortest path algorithms are finding the shortest path on the basis of distance betwwen two nodes.
I am not quite sure whether they are taking care of the cost column in the link table.
for eg., say A-B-C and A-D-C are two alternative routes from A to C .
such that A-B-C is the shortest path on the basis of geodatic distance between the locations A an C.
But may be the cost-wise A-D-C would have been a shorter path.
So, which path will the algo return?
Also I do not want to implement AStarCostFunction class and provide a distance function.
Please help me out.
Regards.Hi,
Any/all cost-based analysis in the network data model is done using the cost column. If the cost column contains geodetic distances then that is what will be used.
Hope this helps,
Dan -
Shortest path between two arbitrary point in the network
Hi All,
In oracle NDM, it's possible to find shortest path between two nodes (e.g. using SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH), but I need to find shortest path between 2 points which are on the network edges. I suppose I should use (Interface SubPath) in network java apis. However I want to do it via PLSQL api. Should I code it myself or there exists a function?
Any help is appreciated.
Edited by: Fa on Dec 15, 2011 2:51 AMpritamg wrote:
I have to build an application in which the user will draw the graph by creating nodes and edges.and then the start node will be marked.Then the shortest paths to other nodes will be displayed.Give me any possible clue how to start.I am in deep deep trouble.I have to use Dijkstra's Algorithm.
please help some one...pleaseDo you know Dijkstra's Algorithm for shortest path? I believe that one was also called the traveling salesman problem. You can easily Google to find out what it is.
Did you listen to your instructor when he/she did his/her lectures on recursion and halting contitions? If not, then please go talk to him/her and read your book, the forum is not a place to try to learn a basic concept that you should have paid attention in class for the first time.
If you have code and you have specific questions post them and we will be glad to help, but we are not here to develop your homework solutions for you, no matter how that may affect your future. -
Workshop IDE Build does not include all files
We have property files also which we want included as part of the build process
but if we use the IDE build it does not include them. We have to therefore export
the IDE build and customize it to include *.properties like this
<zip basedir="${dest.path}" zipfile="${ejb.outputJar}" encoding="UTF8"> <!-- JARs
filenames are encoded UTF8 -->
<zipfileset dir="${project.local.directory}" includes="*.properties" />
</zip>
which causes a problem for us because the exported build file is specific to a
user's local PC and cannot be used in a team environment.
How can we have the IDE build include all the files within a project i.e. include
properties files also.
Thanks
MindyHi Mindy,
Why not in EJB?
Yes there is no argument as to why property files cannot be copied over from EJB
project.
The reason is that Workshop has not implemented the feature with EJBProject. We
have that feature only for Java projects and not for EJB project.
Thanks a lot,
Vimala
"Mindy" <[email protected]> wrote:
>
You are saying the same thing again. My question is why not for EJB projects?
I know we can create the files in Java project and read them with specific
java
files to read them but WHY NOT IN EJB IS THE QUESTION?
"Carl" <[email protected]> wrote:
Feature of the EJB Project:)
"Mindy" <[email protected]> wrote in message
news:4034c351$[email protected]..
We have these property files in the EJB project, not Java project.Why
should they
not be copied if they are part of the EJB project?
"Carl" <[email protected]> wrote:
The properties file do get copied over if they are part of Java project.
Hence, we have created utility classes in Java project that read
the
property file.
For other project types, like EJB the property files didn't get copied...
"Mindy" <[email protected]> wrote in message
news:4033b944$[email protected]..
We have property files also which we want included as part of the
build
process
but if we use the IDE build it does not include them. We have to
therefore
export
the IDE build and customize it to include *.properties like this
<zip basedir="${dest.path}" zipfile="${ejb.outputJar}" encoding="UTF8"><!-- JARs
filenames are encoded UTF8 -->
<zipfileset dir="${project.local.directory}"includes="*.properties" />
</zip>
which causes a problem for us because the exported build file is
specific
to a
user's local PC and cannot be used in a team environment.
How can we have the IDE build include all the files within a projecti.e.
include
properties files also.
Thanks
Mindy -
Is it possible to move my iTunes from the old laptop to the new one (including all the music files and playlists) without having to start all over again with a blank iTunes?
yes
You will need to copy the whole iTunes folder which is in your user profile on the old computer in Music folder.
Before you do it make sure iTunes are updates on the old computer and it works without any problems.
This will copy all your media, music, movies (provided you did not change the default location).
After the migration you will need to sing in to Apple store again with your Apple ID
and also authorize your new computer (both done from the tom menu bar in Store.
Once you are done please deauthorize your old computer (the same menu path) if you are not planning to use it anymore.
Any problems post here. -
How to create report which includes records of current month and last 7 days of previous month.
Hi Experts,
I need to create a report which includes records of current month and last 7 days of previous month.
I will get records of current month by this formula :- month({PROBSUMMARYM1.OPEN_TIME})=month(currentdate)
Please tell me how to add the records of last 7 days of previous Month for the same report.
Thanks in Advance.Hi Ajay,
If you have more than a year data in your database then your formula will return wrong results. ie. If your data consist of 2012,2013,2014 data then below formula will return all 8th month data irrespective of year. So, you need to check year also here
month({PROBSUMMARYM1.OPEN_TIME})=month(currentdate) and
Year({PROBSUMMARYM1.OPEN_TIME})=Year(currentdate)
Now add Abhilash second statement in OR so, your formula should look like :
(month({PROBSUMMARYM1.OPEN_TIME})=month(currentdate) and
Year({PROBSUMMARYM1.OPEN_TIME})=Year(currentdate))
OR
Date({PROBSUMMARYM1.OPEN_TIME}) IN [DateAdd('d',-7,Maximum(LastFullMonth)), Maximum(LastFullMonth)
-Sastry
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