Here is a question about community detection (no pun intended).
The community.to.membership function is making my R session to crash, I have tried several community detection algorithms as explained in the igraph wiki.
below is a copy of the information I get with the crash (it looks ugly to me). Any idea what might be going on? I have used this code before with success so I wonder if this something to do with my current Ubuntu 12 installation.
wmemb <- community.to.membership(SubPatchGraphT, wt$merges,steps=which.max(wt$modularity)-1)
*** glibc detected *** /usr/lib/R/bin/exec/R: free(): invalid next size (fast): 0x09fd2828 ***
======= Backtrace: =========
/lib/i386-linux-gnu/libc.so.6(+0x73e42)[0xb725ee42]
/home/filipe/R/i686-pc-linux-gnu-library/2.15/igraph/libs/igraph.so(igraph_vector_destroy+0x28)[0xb06ce168]
/home/filipe/R/i686-pc-linux-gnu-library/2.15/igraph/libs/igraph.so(R_igraph_community_to_membership+0x12e)[0xb06675ae]
/usr/lib/R/lib/libR.so(+0x9e549)[0xb744a549]
/usr/lib/R/lib/libR.so(Rf_eval+0x750)[0xb7484430]
/usr/lib/R/lib/libR.so(+0xda317)[0xb7486317]
/usr/lib/R/lib/libR.so(Rf_eval+0x550)[0xb7484230]
/usr/lib/R/lib/libR.so(Rf_applyClosure+0x3ad)[0xb74879ad]
/usr/lib/R/lib/libR.so(Rf_eval+0x41d)[0xb74840fd]
/usr/lib/R/lib/libR.so(+0xda19a)[0xb748619a]
/usr/lib/R/lib/libR.so(Rf_eval+0x550)[0xb7484230]
/usr/lib/R/lib/libR.so(Rf_ReplIteration+0x1fa)[0xb74c403a]
/usr/lib/R/lib/libR.so(+0x11831b)[0xb74c431b]
/usr/lib/R/lib/libR.so(run_Rmainloop+0x62)[0xb74c43c2]
/usr/lib/R/lib/libR.so(Rf_mainloop+0x19)[0xb74c43e9]
/usr/lib/R/bin/exec/R(main+0x38)[0x8048608]
/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0xb72044d3]
/usr/lib/R/bin/exec/R[0x8048631]
======= Memory map: ========
08048000-08049000 r-xp 00000000 08:01 8145517 /usr/lib/R/bin/exec/R
08049000-0804a000 r--p 00000000 08:01 8145517 /usr/lib/R/bin/exec/R
0804a000-0804b000 rw-p 00001000 08:01 8145517 /usr/lib/R/bin/exec/R
09569000-0e5f6000 rw-p 00000000 00:00 0 [heap]
ad44e000-adaf7000 rw-p 00000000 00:00 0
af0c3000-af1c4000 rw-p 00000000 00:00 0
af5bf000-b037c000 rw-p 00000000 00:00 0
b037d000-b041b000 rw-p 00000000 00:00 0
b041b000-b079d000 r-xp 00000000 08:01 22326943 /home/filipe/R/i686-pc-linux-gnu-library/2.15/igraph/libs/igraph.so
b079d000-b079e000 r--p 00382000 08:01 22326943 /home/filipe/R/i686-pc-linux-gnu-library/2.15/igraph/libs/igraph.so
b079e000-b07a2000 rw-p 00383000 08:01 22326943 /home/filipe/R/i686-pc-linux-gnu-library/2.15/igraph/libs/igraph.so
b07a2000-b07fd000 rw-p 00000000 00:00 0
b07fd000-b08d5000 r-xp 00000000 08:01 2631629 /usr/lib/i386-linux-gnu/libstdc++.so.6.0.16
b08d5000-b08d6000 ---p 000d8000 08:01 2631629 /usr/lib/i386-linux-gnu/libstdc++.so.6.0.16
b08d6000-b08da000 r--p 000d8000 08:01 2631629 /usr/lib/i386-linux-gnu/libstdc++.so.6.0.16
b08da000-b08db000 rw-p 000dc000 08:01 2631629 /usr/lib/i386-linux-gnu/libstdc++.so.6.0.16
b08db000-b08e2000 rw-p 00000000 00:00 0
b08e2000-b0950000 r-xp 00000000 08:01 21672763 /home/filipe/R/i686-pc-linux-gnu-library/2.15/bigmemory/libs/bigmemory.so
b0950000-b0951000 r--p 0006d000 08:01 21672763 /home/filipe/R/i686-pc-linux-gnu-library/2.15/bigmemory/libs/bigmemory.so
b0951000-b0952000 rw-p 0006e000 08:01 21672763 /home/filipe/R/i686-pc-linux-gnu-library/2.15/bigmemory/libs/bigmemory.so
b0952000-b10ef000 r-xp 00000000 08:01 4993027 /usr/lib/lapack/liblapack.so.3gf.0
b10ef000-b10f0000 r--p 0079c000 08:01 4993027 /usr/lib/lapack/liblapack.so.3gf.0
b10f0000-b10f3000 rw-p 0079d000 08:01 4993027 /usr/lib/lapack/liblapack.so.3gf.0
b10f3000-b136d000 rw-p 00000000 00:00 0
b136d000-b1396000 r-xp 00000000 08:01 8145900 /usr/lib/R/library/grDevices/libs/grDevices.so
b1396000-b1397000 r--p 00028000 08:01 8145900 /usr/lib/R/library/grDevices/libs/grDevices.so
b1397000-b1398000 rw-p 00029000 08:01 8145900 /usr/lib/R/library/grDevices/libs/grDevices.so
b13bb000-b13de000 r-xp 00000000 08:01 8146213 /usr/lib/R/library/grid/libs/grid.so
b13de000-b13df000 r--p 00023000 08:01 8146213 /usr/lib/R/library/grid/libs/grid.so
b13df000-b13e0000 rw-p 00024000 08:01 8146213 /usr/lib/R/library/grid/libs/grid.so
b13e0000-b1452000 r-xp 00000000 08:01 2631573 /usr/lib/i386-linux-gnu/libquadmath.so.0.0.0
b1452000-b1453000 r--p 00071000 08:01 2631573 /usr/lib/i386-linux-gnu/libquadmath.so.0.0.0
b1453000-b1454000 rw-p 00072000 08:01 2631573 /usr/lib/i386-linux-gnu/libquadmath.so.0.0.0
b1454000-b1470000 r-xp 00000000 08:01 9325236 /lib/i386-linux-gnu/libgcc_s.so.1
b1470000-b1471000 r--p 0001b000 08:01 9325236 /lib/i386-linux-gnu/libgcc_s.so.1
b1471000-b1472000 rw-p 0001c000 08:01 9325236 /lib/i386-linux-gnu/libgcc_s.so.1
b1472000-b1570000 r-xp 00000000 08:01 2635686 /usr/lib/i386-linux-gnu/libgfortran.so.3.0.0
b1570000-b1571000 r--p 000fe000 08:01 2635686 /usr/lib/i386-linux-gnu/libgfortran.so.3.0.0
b1571000-b1572000 rw-p 000ff000 08:01 2635686 /usr/lib/i386-linux-gnu/libgfortran.so.3.0.0
b1572000-b1573000 rw-p 00000000 00:00 0
b1578000-b157e000 r-xp 00000000 08:01 21546120 /home/filipe/R/i686-pc-linux-gnu-library/2.15/sp/libs/sp.so
b157e000-b157f000 r--p 00005000 08:01 21546120 /home/filipe/R/i686-pc-linux-gnu-library/2.15/sp/libs/sp.so
b157f000-b1580000 rw-p 00006000 08:01 21546120 /home/filipe/R/i686-pc-linux-gnu-library/2.15/sp/libs/sp.so
b1580000-b1583000 r-xp 00000000 08:01 8276903 /usr/lib/R/library/lattice/libs/lattice.so
b1583000-b1584000 r--p 00002000 08:01 8276903 /usr/lib/R/library/lattice/libs/lattice.so
b1584000-b1585000 rw-p 00003000 08:01 8276903 /usr/lib/R/library/lattice/libs/lattice.so
b1585000-b1587000 r-xp 00000000 08:01 21546211 /home/filipe/R/i686-pc-linux-gnu-library/2.15/colorout/libs/colorout.so
b1587000-b1588000 r--p 00001000 08:01 21546211 /home/filipe/R/i686-pc-linux-gnu-library/2.15/colorout/libs/colorout.so
b1588000-b1589000 rw-p 00002000 08:01 21546211 /home/filipe/R/i686-pc-linux-gnu-library/2.15/colorout/libs/colorout.so
b1589000-b15f5000 r-xp 00000000 08:01 8273778 /usr/lib/R/library/stats/libs/stats.so
b15f5000-b15f6000 r--p 0006c000 08:01 8273778 /usr/lib/R/library/stats/libs/stats.so
b15f6000-b15f7000 rw-p 0006d000 08:01 8273778 /usr/lib/R/library/stats/libs/stats.so
b15f7000-b2c19000 rw-p 00000000 00:00 0
b51a5000-b6ac1000 rw-p 00000000 00:00 0
b6ac1000-b6ac3000 r-xp 00000000 08:01 2631959 /usr/lib/i386-linux-gnu/gconv/ISO8859-1.so
b6ac3000-b6ac4000 r--p 00001000 08:01 2631959 /usr/lib/i386-linux-gnu/gconv/ISO8859-1.so
b6ac4000-b6ac5000 rw-p 00002000 08:01 2631959 /usr/lib/i386-linux-gnu/gconv/ISO8859-1.so
b6ac5000-b6bcc000 rw-p 00000000 00:00 0
b6bcc000-b6bd3000 r-xp 00000000 08:01 8273895 /usr/lib/R/library/methods/libs/methods.so
b6bd3000-b6bd4000 r--p 00006000 08:01 8273895 /usr/lib/R/library/methods/libs/methods.so
b6bd4000-b6bd5000 rw-p 00007000 08:01 8273895 /usr/lib/R/library/methods/libs/methods.so
b6bd5000-b6c6b000 rw-p 00000000 00:00 0
b6c6b000-b6c76000 r-xp 00000000 08:01 9325266 /lib/i386-linux-gnu/libnss_files-2.15.soAborted (core dumped)