我正在与协和飞机一起解决TSP问题。这是我的代码
library(TSP)
concordePath = "E:/Concorde_Code/"
concorde_path(concordePath)
concorde_help()
dataset_path = "E:/RA/"
name = "graph1.txt"
dataset = read.table(paste(dataset_path,name,sep = ""))
arr=dataset
nodelist = unique(as.vector(as.matrix(arr)))
arr_mat = matrix(0,length(nodelist),length(nodelist))
for (i in 1:length(arr[,1])){
arr_mat[arr[i,1],arr[i,2]] = 1
arr_mat[arr[i,2],arr[i,1]] = 1
}
arr_mat_new = arr_mat
for(i in 1:length(arr_mat[,1])){
arr_mat_new[i,which(arr_mat[i,]==0)] = 2 #replace all zero entries with 2
}
d <- as.dist(arr_mat_new)
tsp <- TSP(d)
tsp
o <- solve_TSP(tsp, method="concorde")
labels(o)
Concorde已正确安装在我的系统上，并且工作正常。运行concorde_help（）时，得到以下输出
The following options can be specified in solve_TSP with method "concorde" using clo in control:
/Concorde_Code/concorde
Usage: /Concorde_Code/concorde [-see below-] [dat_file]
-B do not branch
-C # maximum chunk size in localcuts (default 16)
-d use dfs branching instead of bfs
-D f edgegen file for initial edge set
-e f initial edge file
-E f full edge file (must contain initial edge set)
-f write optimal tour as edge file (default is tour file)
-F f read extra cuts from file
-g h be a grunt for boss h
-h be a boss for the branching
-i just solve the blossom polytope
-I just solve the subtour polytope
-J # number of tentative branches
-k # number of nodes for random problem
-K h use cut server h
-M f master file
-m use multiple passes of cutting loop
-n s problem location (just a name or host:name, not a file name)
-o f output file name (for optimal tour)
-P f cutpool file
-q do not cut the root lp
-r # use #x# grid for random points, no dups if #<0
-R f restart file
-s # random seed
-S f problem file
-t f tour file (in node node node format)
-u v initial upperbound
-U do not permit branching on subtour inequalities
-v verbose (turn on lots of messages)
-V just run fast cuts
-w just subtours and trivial blossoms
-x delete files on completion (sav pul mas)
-X f write the last root fractional solution to f
-y use simple cutting and branching in DFS
-z # dump the #-lowest reduced cost edges to file xxx.rcn
-N # norm (must specify if dat file is not a TSPLIB file)
0=MAX, 1=L1, 2=L2, 3=3D, 4=USER, 5=ATT, 6=GEO, 7=MATRIX,
8=DSJRAND, 9=CRYSTAL, 10=SPARSE, 11-15=RH-norm 1-5, 16=TOROIDAL
17=GEOM, 18=JOHNSON
这表明Concorde已正确安装。但是，当我尝试运行R代码（在顶部给出）时，有时会得到答案，而有时我的程序会卡住。当程序成功执行后，我得到以下输出
Used control parameters:
clo =
exe = E:\Concorde_Code\/concorde
precision = 6
verbose = TRUE
keep_files = FALSE
/Concorde_Code/concorde -x -o file18ec719b5412.sol file18ec719b5412.dat
Host: Pasha Current process id: 1165
Using random seed 1586633006
Problem Name: TSP
Generated by write_TSPLIB (R-package TSP)
Problem Type: TSP
Number of Nodes: 66
Explicit Lengths (CC_MATRIXNORM)
Set initial upperbound to 0 (from tour)
LP Value 1: 0.000000 (0.03 seconds)
New lower bound: 0.000000
WARNING: LK incremental counter was off by 4294967296
Final lower bound 0.000000, upper bound 0.000000
Exact lower bound: 0.000000
DIFF: 0.000000
Final LP has 71 rows, 129 columns, 345 nonzeros
Optimal Solution: 0.00
Number of bbnodes: 1
Total Running Time: 1.70 (seconds)
在上面的输出中，最优解为0.00。谁能告诉我为什么这个为零？有时代码也不会执行并提供以下输出
Used control parameters:
clo =
exe = E:\Concorde_Code\/concorde
precision = 6
verbose = TRUE
keep_files = FALSE
/Concorde_Code/concorde -x -o file18ec7f123355.sol file18ec7f123355.dat
Host: Pasha Current process id: 693
Using random seed 1586633314
FATAL ERROR - received signal SIGSEGV (11/11)
Problem Name: TSP
Generated by write_TSPLIB (R-package TSP)
Problem Type: TSP
Number of Nodes: 66
Explicit Lengths (CC_MATRIXNORM)
sleeping 1 more hours to permit debugger access
此输出之后，什么也没有发生，并且程序似乎进入了无限循环。谁能告诉我我在做什么错？
这是我的系统故障吗？我正在使用Windows 10和R-studio 64位的i3核心系统。
编辑：这是我正在使用的数据集
V1 V2 1 1 3 2 1 9 3 1 61 4 2 17 5 2 31 6 2 51 7 3 40 8 3 46 9 4 42 10 4 47 11 4 63 12 5 8 13 5 18 14 5 39 15 6 30 16 6 40 17 6 62 18 7 13 19 7 31 20 7 58 21 8 50 22 8 63 23 9 25 24 9 35 25 10 16 26 10 27 27 10 44 28 11 19 29 11 45 30 11 54 31 12 21 32 12 47 33 12 55 34 13 51 35 13 66 36 14 35 37 14 57 38 14 61 39 15 18 40 15 20 41 15 63 42 16 52 43 16 53 44 17 21 45 17 37 46 18 23 47 19 52 48 19 56 49 20 32 50 20 57 51 21 34 52 22 38 53 22 44 54 22 60 55 23 49 56 23 57 57 24 36 58 24 56 59 24 62 60 25 36 61 25 46 62 26 43 63 26 60 64 26 64 65 27 60 66 27 65 67 28 44 68 28 45 69 28 52 70 29 31 71 29 37 72 29 41 73 30 54 74 30 56 75 32 35 76 32 36 77 33 43 78 33 48 79 33 66 80 34 39 81 34 50 82 37 55 83 38 45 84 38 59 85 39 49 86 40 59 87 41 42 88 41 58 89 42 55 90 43 65 91 46 62 92 47 50 93 48 51 94 48 53 95 49 61 96 53 65 97 54 59 98 58 64 99 64 66编辑2：这是会话信息
R version 3.5.2 (2018-12-20)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)
Matrix products: default
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] R.utils_2.9.2 R.oo_1.23.0 R.methodsS3_1.8.0 tspmeta_1.2 MASS_7.3-51.1
[6] ggplot2_3.1.1 TSP_1.1-9
loaded via a namespace (and not attached):
[1] modeltools_0.2-22 tidyselect_0.2.5 xfun_0.4 purrr_0.2.5 kernlab_0.9-27
[6] lattice_0.20-38 colorspace_1.4-1 stats4_3.5.2 mgcv_1.8-26 yaml_2.2.0
[11] rlang_0.3.4 pillar_1.4.1 glue_1.3.1 withr_2.1.2 prabclus_2.2-6
[16] sp_1.3-1 fpc_2.1-11.1 bindrcpp_0.2.2 foreach_1.4.4 bindr_0.1.1
[21] plyr_1.8.4 robustbase_0.93-3 stringr_1.4.0 munsell_0.5.0 gtable_0.3.0
[26] mvtnorm_1.0-8 codetools_0.2-15 knitr_1.21 permute_0.9-5 parallel_3.5.2
[31] flexmix_2.3-14 class_7.3-15 DEoptimR_1.0-8 trimcluster_0.1-2.1 Rcpp_1.0.1
[36] backports_1.1.4 scales_1.0.0 diptest_0.75-7 checkmate_1.9.0 vegan_2.5-6
[41] stringi_1.4.3 BBmisc_1.11 dplyr_0.7.8 splancs_2.01-40 grid_3.5.2
[46] tools_3.5.2 magrittr_1.5 lazyeval_0.2.2 tibble_2.1.3 cluster_2.0.7-1
[51] crayon_1.3.4 pkgconfig_2.0.2 Matrix_1.2-15 assertthat_0.2.1 rstudioapi_0.8
[56] iterators_1.0.10 R6_2.4.0 mclust_5.4.2 nlme_3.1-137 nnet_7.3-12
[61] compiler_3.5.2
我正在与协和飞机一起解决TSP问题。这是我的代码库（TSP）concordePath =“ E：/ Concorde_Code /” concorde_path（concordePath）concorde_help（）dataset_path =“ E：/ RA /” name =“ graph1 ....