Hi, That's strange because you are not supposed to hit the branch that produces this error message if the "start" argument that you pass to igraph_community_leading_eigenvector is zero (which is the case here). There is a slight possibility that some accidental memory access error somewhere else in the code overwrites the value of the "start" argument; can you run your executable through Valgrind to see if there are any uninitialized variables or invalid reads/writes that could explain this?
All the best, -- T. -----Original Message----- From: [email protected] <[email protected]> Reply: Help for igraph users <[email protected]>> Date: 28 August 2014 at 12:11:31 To: [email protected] <[email protected]>> Subject: [igraph] community_leading_eigenvector in cpp > Hi, > > I am trying to use the function "community_leading_eigenvector()", but I've > got the > following error: > > # Error: > Error at community.c:1349 :Wrong length for vector of predefined memberships, > Invalid > value > > # Information: > gc3-user@igraph-tests:~$ lsb_release -a > No LSB modules are available. > Distributor ID: Ubuntu > Description: Ubuntu 14.04.1 LTS > Release: 14.04 > Codename: trusty > > > $ g++ -v > Using built-in specs. > COLLECT_GCC=g++ > COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper > Target: x86_64-linux-gnu > Configured with: ../src/configure -v --with-pkgversion='Ubuntu > 4.8.2-19ubuntu1' > --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs > --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ > --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id > --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix > --with-gxx-include-dir=/usr/include/c++/4.8 > --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu > --enable-libstdcxx-debug > --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap > --enable-plugin --with-system-zlib --disable-browser-plugin > --enable-java-awt=gtk > --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre > > --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64 > --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64 > --with-arch-directory=amd64 > --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc > --enable-multiarch > --disable-werror --with-arch-32=i686 --with-abi=m64 > --with-multilib-list=m32,m64,mx32 > --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu > --host=x86_64-linux-gnu > --target=x86_64-linux-gnu > Thread model: posix > gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) > > > g++ leadingeigenvector_test.cpp -I/usr/local/include/igraph/ -ligraph -o > leadingeigenvector-zhao > > > # Extract of the code > … > f = fopen (inputFilename, "r"); > igraph_read_graph_edgelist(&g, f, 0, IGRAPH_UNDIRECTED); > fclose(f); > > igraph_simplify(&g, 1, 1, 0); > > igraph_matrix_init(&merges, 0, 0); > igraph_vector_init(&membership, 0); > igraph_arpack_options_init(&options); > > > clock_t start=clock(); > igraph_community_leading_eigenvector(&g, 0, &merges, &membership, > igraph_vcount(&g), > &options, &modularity, 0, 0, 0, 0, 0, 0); > clock_t end=clock(); > … > > # While The same code works on MacOS-X (10.9.4) > * igraph 0.7.1 installed with Homebrew > * g++ 4.8 > > Does anyone know the reason why there is an error message? > > Best regards, > Zhao > > > > > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help > _______________________________________________ igraph-help mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/igraph-help
