I am getting following errors in mex file

Question

Asghar Ali 2017-3-26

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/331928-i-am-getting-following-errors-in-mex-file

编辑： Jan 2017-3-27

------------------------------------------------------------------------
          Access violation detected at Sun Mar 26 12:21:15 2017
------------------------------------------------------------------------
Configuration:
  Crash Decoding      : Disabled - No sandbox or build area path
  Crash Mode          : continue (default)
  Current Graphics Driver: Unknown hardware 
  Default Encoding    : windows-1252
  Deployed            : false
  Graphics card 1     : NVIDIA ( 0x10de ) NVIDIA Quadro K620  Version 9.18.13.4052
  Host Name           : C1058
  MATLAB Architecture : win64
  MATLAB Entitlement ID: 859636
  MATLAB Root         : C:\Program Files\MATLAB\R2016b
  MATLAB Version      : 9.1.0.441655 (R2016b)
  OpenGL              : hardware
  Operating System    : Microsoft Windows 7 Enterprise 
  Processor ID        : x86 Family 6 Model 60 Stepping 3, GenuineIntel
  Virtual Machine     : Java 1.7.0_60-b19 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
  Window System       : Version 6.1 (Build 7601: Service Pack 1)
Fault Count: 1
Abnormal termination:
Access violation
Register State (from fault):
  RAX = 0000000000000000  RBX = 00000000000006a0
  RCX = 0000000000000004  RDX = 0000000000000001
  RSP = 000000000402a460  RBP = 00000000000001d3
  RSI = 0000000000000004  RDI = 00000000000001d3
     R8 = 0000000000000001   R9 = 000000000000025a
    R10 = 0000000000000258  R11 = 00000001b7d753c0
    R12 = 0000000000000258  R13 = 0000000000000000
    R14 = 00000001b7d753c0  R15 = 00000000ff7592e0
    RIP = 00000000322013de  EFL = 00010202
     CS = 0033   FS = 0053   GS = 002b
Stack Trace (from fault):
[  0] 0x00000000322013de C:\Text_Detection_Recognition\Word-Spotting\Word-Spotting\util\bin\computeStats_c.mexw64+00005086 mexFunction+00000958
[  1] 0x00000000fc5fc5d1 C:\Program Files\MATLAB\R2016b\bin\win64\libmex.dll+00116177 mexRunMexFile+00000129
[  2] 0x00000000fc5fb2e2 C:\Program Files\MATLAB\R2016b\bin\win64\libmex.dll+00111330 mexFeature_mexver+00001794
[  3] 0x00000000fc5fa506 C:\Program Files\MATLAB\R2016b\bin\win64\libmex.dll+00107782 mexUnlock+00020182
[  4] 0x000000000c6a46de C:\Program Files\MATLAB\R2016b\bin\win64\m_dispatcher.dll+00018142 Mfh_file::dispatch_fh_impl+00000434
[  5] 0x000000000c6a44b6 C:\Program Files\MATLAB\R2016b\bin\win64\m_dispatcher.dll+00017590 Mfh_file::dispatch_fh+00000062
[  6] 0x000000000c6a5827 C:\Program Files\MATLAB\R2016b\bin\win64\m_dispatcher.dll+00022567 Mfunction_handle::dispatch+00001015
[  7] 0x000000000d6c8c29 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00887849 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00798773
[  8] 0x000000000d6c8707 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00886535 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00797459
[  9] 0x000000000d6c74b8 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00881848 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00792772
[ 10] 0x000000000d649eab C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00368299 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00279223
[ 11] 0x000000000d649740 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00366400 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00277324
[ 12] 0x000000000d6d1efe C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00925438 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00836362
[ 13] 0x000000000d6d195a C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00923994 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00834918
[ 14] 0x000000000d6d1979 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00924025 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00834949
[ 15] 0x000000000c6a46de C:\Program Files\MATLAB\R2016b\bin\win64\m_dispatcher.dll+00018142 Mfh_file::dispatch_fh_impl+00000434
[ 16] 0x000000000c6a44b6 C:\Program Files\MATLAB\R2016b\bin\win64\m_dispatcher.dll+00017590 Mfh_file::dispatch_fh+00000062
[ 17] 0x000000000c6a5827 C:\Program Files\MATLAB\R2016b\bin\win64\m_dispatcher.dll+00022567 Mfunction_handle::dispatch+00001015
[ 18] 0x000000000d6cbfbd C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00901053 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00811977
[ 19] 0x000000000d69fbc0 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00719808 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00630732
[ 20] 0x000000000d6d728f C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00946831 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00857755
[ 21] 0x000000000d6d7b75 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00949109 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00860033
[ 22] 0x000000000d6d9151 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00954705 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00865629
[ 23] 0x000000000d6d9c95 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00957589 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00868513
[ 24] 0x000000000d6d932f C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00955183 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00866107
[ 25] 0x000000000d6d940d C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00955405 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00866329
[ 26] 0x000000000d6c8041 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00884801 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00795725
[ 27] 0x000000000d649eab C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00368299 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00279223
[ 28] 0x000000000d649740 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00366400 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00277324
[ 29] 0x000000000d643f8f C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00343951 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00254875
[ 30] 0x000000000d643aa1 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00342689 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00253613
[ 31] 0x000000000d643991 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00342417 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00253341
[ 32] 0x000000000d7d03e9 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+01967081 boost::serialization::singleton<boost::archive::detail::oserializer<boost::archive::polymorphic_oarchive,foundation::msg_svc::eventmgr::BaseEvent> >::get_instance+00003353
[ 33] 0x000000000d7d0372 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+01966962 boost::serialization::singleton<boost::archive::detail::oserializer<boost::archive::polymorphic_oarchive,foundation::msg_svc::eventmgr::BaseEvent> >::get_instance+00003234
[ 34] 0x000000000d692a61 C:\Program Files\MATLAB\R2016b\bin\win64\m_lxe.dll+00666209 boost::serialization::singleton<boost::archive::detail::iserializer<boost::archive::binaryTerm_iarchive,ir::IrTree> >::get_instance+00577133
[ 35] 0x000000000c90b3bd C:\Program Files\MATLAB\R2016b\bin\win64\m_interpreter.dll+00504765 inEvalCmdWithLocalReturn+00000065
[ 36] 0x00000000fb608ced C:\Program Files\MATLAB\R2016b\bin\win64\libmwbridge.dll+00101613 mnGetPrompt+00012957
[ 37] 0x00000000fb609ba3 C:\Program Files\MATLAB\R2016b\bin\win64\libmwbridge.dll+00105379 mnParser+00001091
[ 38] 0x000000000d406841   C:\Program Files\MATLAB\R2016b\bin\win64\mcr.dll+00223297 mcr::runtime::setInterpreterThreadToCurrent+00025585
[ 39] 0x000000000d4057d7   C:\Program Files\MATLAB\R2016b\bin\win64\mcr.dll+00219095 mcr::runtime::setInterpreterThreadToCurrent+00021383
[ 40] 0x000000000d405853   C:\Program Files\MATLAB\R2016b\bin\win64\mcr.dll+00219219 mcr::runtime::setInterpreterThreadToCurrent+00021507
[ 41] 0x000000000d406141   C:\Program Files\MATLAB\R2016b\bin\win64\mcr.dll+00221505 mcr::runtime::setInterpreterThreadToCurrent+00023793
[ 42] 0x00000000fd01d347   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00578375 iqm::UserEvalPlugin::pre+00030679
[ 43] 0x00000000fd029e7c   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00630396 iqm::UserEvalPlugin::pre+00082700
[ 44] 0x00000000fd017480   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00554112 iqm::UserEvalPlugin::pre+00006416
[ 45] 0x00000000fd02c99a   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00641434 iqm::UserEvalPlugin::pre+00093738
[ 46] 0x00000000fcff9a37   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00432695 iqm::PackagedTaskPlugin::PackagedTaskPlugin+00000727
[ 47] 0x00000000fcffa08f   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00434319 iqm::PackagedTaskPlugin::execute+00000575
[ 48] 0x00000000fcff9aa9   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00432809 iqm::PackagedTaskPlugin::PackagedTaskPlugin+00000841
[ 49] 0x00000000fcff9f04   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00433924 iqm::PackagedTaskPlugin::execute+00000180
[ 50] 0x00000000fcfd42fa   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00279290 iqm::Iqm::setupIqmFcnPtrs+00071530
[ 51] 0x00000000fcfd41d3   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00278995 iqm::Iqm::setupIqmFcnPtrs+00071235
[ 52] 0x00000000fcfb9e5a   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00171610 iqm::Iqm::deliver+00003274
[ 53] 0x00000000fcfbad2f   C:\Program Files\MATLAB\R2016b\bin\win64\iqm.dll+00175407 iqm::Iqm::deliver+00007071
[ 54] 0x0000000004538173 C:\Program Files\MATLAB\R2016b\bin\win64\libmwservices.dll+01147251 services::system_events::PpeDispatchHook::dispatchOne+00019059
[ 55] 0x000000000453c3a3 C:\Program Files\MATLAB\R2016b\bin\win64\libmwservices.dll+01164195 sysq::addProcessPendingEventsUnitTestHook+00001923
[ 56] 0x000000000453c580 C:\Program Files\MATLAB\R2016b\bin\win64\libmwservices.dll+01164672 sysq::addProcessPendingEventsUnitTestHook+00002400
[ 57] 0x000000000453d685 C:\Program Files\MATLAB\R2016b\bin\win64\libmwservices.dll+01169029 sysq::getCondition+00002917
[ 58] 0x000000000453e4b2 C:\Program Files\MATLAB\R2016b\bin\win64\libmwservices.dll+01172658 svWS_ProcessPendingEvents+00000162
[ 59] 0x000000000d406b7d   C:\Program Files\MATLAB\R2016b\bin\win64\mcr.dll+00224125 mcr::runtime::setInterpreterThreadToCurrent+00026413
[ 60] 0x000000000d40726a   C:\Program Files\MATLAB\R2016b\bin\win64\mcr.dll+00225898 mcr::runtime::setInterpreterThreadToCurrent+00028186
[ 61] 0x000000000d3fe385   C:\Program Files\MATLAB\R2016b\bin\win64\mcr.dll+00189317 mcr_process_events+00010293
[ 62] 0x000000000d4002d2   C:\Program Files\MATLAB\R2016b\bin\win64\mcr.dll+00197330 mcr_process_events+00018306
[ 63] 0x000000000c61bd0e C:\Program Files\MATLAB\R2016b\bin\win64\MVMLocal.dll+00245006 mvm_server::inproc::LocalFactory::terminate+00070846
[ 64] 0x00000000fa942cd9   C:\Program Files\MATLAB\R2016b\bin\win64\mvm.dll+01125593 mvm::detail::initLocalMvmHack+00000521
[ 65] 0x00000000fa9432a5   C:\Program Files\MATLAB\R2016b\bin\win64\mvm.dll+01127077 mvm::detail::SessionImpl::privateSession+00000373
[ 66] 0x00000000fa9434b1   C:\Program Files\MATLAB\R2016b\bin\win64\mvm.dll+01127601 mvm::detail::SessionImpl::privateSession+00000897
[ 67] 0x0000000140006fd5 C:\Program Files\MATLAB\R2016b\bin\win64\MATLAB.exe+00028629
[ 68] 0x0000000140007661 C:\Program Files\MATLAB\R2016b\bin\win64\MATLAB.exe+00030305
[ 69] 0x00000000771259cd C:\Windows\system32\kernel32.dll+00088525 BaseThreadInitThunk+00000013
[ 70] 0x000000007735a561 C:\Windows\SYSTEM32\ntdll.dll+00173409 RtlUserThreadStart+00000033
This error was detected while a MEX-file was running. If the MEX-file
is not an official MathWorks function, please examine its source code
for errors. Please consult the External Interfaces Guide for information
on debugging MEX-files.
If this problem is reproducible, please submit a Service Request via:
    http://www.mathworks.com/support/contact_us/
A technical support engineer might contact you with further information.

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Asghar Ali 2017-3-26

编辑：Walter Roberson 2017-3-26

在 MATLAB Online 中打开

Thank you so much Geoff Hayes. Here is code attached.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <xmmintrin.h>
#include <assert.h>
#include <math.h>
#include <time.h>
#include <mex.h>
int sort(const void *x, const void *y) {
    if (*(int*)x > *(int*)y) return 1;
    else if (*(int*)x < *(int*)y) return -1;
    else return 0;
}
void mexFunction (int nlhs, mxArray *plhs[], 
        int nrhs, const mxArray *prhs[]) {
      /* Input parameters */
      /* [0]: Similarity matrix
       * [1]: queriesClasses
       * [2]: datasetClasses
       * [3]: NRelevantsPerQuery, number of relevants for each query.
       * [4]: queriesIdx (can be -1s)
       */
      /* Output parameters */
      /* [0]: p@1 array
       * [1]: map array
       * [2]: idx of the best match for each query 
       */
      int Nqueries, Ndataset;
      int *queriesCls;
      int *datasetCls;
      int *NRelevantsPerQuery;
      int *queriesIdx;        
      float *S;    
      float *pP1;
      float *pMap;
      int *bestIdx;    
      int i;
      int j;
      int k;
      float s;
      float s2;
      int better;
      int equal;
      float prec_at_k;
      float bestS;
      int p1;
      int *rank;
      int Nrelevants;
      int qclass;
      //int mwSize;
      /* Read Data */
      S =  (float*)mxGetData(prhs[0]);
      Nqueries = (int) mxGetN(prhs[0]);
      Ndataset = (int) mxGetM(prhs[0]);
      queriesCls =  (int*)mxGetData(prhs[1]);    
      datasetCls =  (int*)mxGetData(prhs[2]);
      NRelevantsPerQuery = (int*)mxGetData(prhs[3]);
      queriesIdx =  (int*)mxGetData(prhs[4]);
      /* Prepare output */
      //buflen =mxMalloc((mwSize)Nqueries);
      //dims[0]=Nqueries;
      //dims[0] = mxGetN(prhs[0], dims, (mwSize)buflen);
      //mwSize dims[0]=(int) mxGetN(prhs[0]); 
      //dims[0] = Nqueries;
      //int* tt = mxMalloc(Nqueries);
      mwSize dims[1];
      //dims[0] = (int)malloc((Nqueries)*sizeof(int));
      //int* dims= new int[1];
      dims[0]= Nqueries;
      plhs[0] = mxCreateNumericArray(1, dims, mxSINGLE_CLASS, mxREAL);
      plhs[1] = mxCreateNumericArray(1, dims, mxSINGLE_CLASS, mxREAL);
      plhs[2] = mxCreateNumericArray(1, dims, mxINT32_CLASS, mxREAL);
      pP1 = (float*)mxGetData(plhs[0]);
      pMap = (float*)mxGetData(plhs[1]);
      bestIdx = (int*)mxGetData(plhs[2]);
      /* one query per row, scores in each column */
      /* for each query */
      #pragma omp parallel  for
      for (i=0; i < Nqueries; i++)
      {
          pMap[i]=0;
          pP1[i]=0;
          /* Create a private list of relevants. */
           *rank = (int)malloc(NRelevantsPerQuery[i]*sizeof(int));
           Nrelevants = 0;
          /* Get its class */
           qclass = queriesCls[i];
          /* For each element in the dataset */
          bestS=-99999;
          p1=0;
          for (j=0; j < Ndataset; j++)
          {            
               s = S[i*Ndataset + j];
              /* Precision at 1 part */
              if (queriesIdx[i]!=j && s > bestS)
              {
                  bestS = s;
                  p1 = datasetCls[j]==qclass;
                  bestIdx[i] = j+1; /* Matlab style */
              }
              /* If it is from the same class and it is not the query idx, it is a relevant one. */
              /* Compute how many on the dataset get a better score and how many get an equal one, excluding itself and the query.*/
              if (datasetCls[j]==qclass && queriesIdx[i]!=j)
              {
                   better=0;
                   equal = 0;
                  for (k=0; k < Ndataset; k++)
                  {
                      if (k!=j && queriesIdx[i]!=k)
                      {
                           s2 = S[i*Ndataset + k];
                          if (s2> s) better++;
                          else if (s2==s) equal++;
                      }
                  }
                  rank[Nrelevants]=better+floor(equal/2.0);
                  Nrelevants++;
              }
          }
          /* Sort the ranked positions) */
          qsort(rank, Nrelevants, sizeof(int), sort);
          pP1[i] = p1;
          /* Get mAP and store it */
          for(j=0;j<Nrelevants;j++){
              /* if rank[i] >=k it was not on the topk. Since they are sorted, that means bail out already */
               prec_at_k =  ((float)(j+1))/(rank[j]+1);
              //mexPrintf("prec_at_k: %f\n", prec_at_k);
              pMap[i] += prec_at_k;            
          }
          pMap[i]/=Nrelevants;
      }
       return;
}

Asghar Ali 2017-3-26

编辑：Walter Roberson 2017-3-26

在 MATLAB Online 中打开

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <xmmintrin.h>
#include <assert.h>
#include <math.h>
#include <time.h>
#include <mex.h>
int sort(const void *x, const void *y) {
    if (*(int*)x > *(int*)y) return 1;
    else if (*(int*)x < *(int*)y) return -1;
    else return 0;
}
void mexFunction (int nlhs, mxArray *plhs[], 
        int nrhs, const mxArray *prhs[]) {
      /* Input parameters */
      /* [0]: Similarity matrix
       * [1]: queriesClasses
       * [2]: datasetClasses
       * [3]: NRelevantsPerQuery, number of relevants for each query.
       * [4]: queriesIdx (can be -1s)
       */
      /* Output parameters */
      /* [0]: p@1 array
       * [1]: map array
       * [2]: idx of the best match for each query 
       */
      int Nqueries, Ndataset;
      int *queriesCls;
      int *datasetCls;
      int *NRelevantsPerQuery;
      int *queriesIdx;        
      float *S;    
      float *pP1;
      float *pMap;
      int *bestIdx;    
      int i;
      int j;
      int k;
      float s;
      float s2;
      int better;
      int equal;
      float prec_at_k;
      float bestS;
      int p1;
      int *rank;
      int Nrelevants;
      int qclass;
      //int mwSize;
      /* Read Data */
      S =  (float*)mxGetData(prhs[0]);
      Nqueries = (int) mxGetN(prhs[0]);
      Ndataset = (int) mxGetM(prhs[0]);
      queriesCls =  (int*)mxGetData(prhs[1]);    
      datasetCls =  (int*)mxGetData(prhs[2]);
      NRelevantsPerQuery = (int*)mxGetData(prhs[3]);
      queriesIdx =  (int*)mxGetData(prhs[4]);
      /* Prepare output */
      //buflen =mxMalloc((mwSize)Nqueries);
      //dims[0]=Nqueries;
      //dims[0] = mxGetN(prhs[0], dims, (mwSize)buflen);
      //mwSize dims[0]=(int) mxGetN(prhs[0]); 
      //dims[0] = Nqueries;
      //int* tt = mxMalloc(Nqueries);
      mwSize dims[1];
      //dims[0] = (int)malloc((Nqueries)*sizeof(int));
      //int* dims= new int[1];
      dims[0]= Nqueries;
      plhs[0] = mxCreateNumericArray(1, dims, mxSINGLE_CLASS, mxREAL);
      plhs[1] = mxCreateNumericArray(1, dims, mxSINGLE_CLASS, mxREAL);
      plhs[2] = mxCreateNumericArray(1, dims, mxINT32_CLASS, mxREAL);
      pP1 = (float*)mxGetData(plhs[0]);
      pMap = (float*)mxGetData(plhs[1]);
      bestIdx = (int*)mxGetData(plhs[2]);
      /* one query per row, scores in each column */
      /* for each query */
      #pragma omp parallel  for
      for (i=0; i < Nqueries; i++)
      {
          pMap[i]=0;
          pP1[i]=0;
          /* Create a private list of relevants. */
           *rank = (int)malloc(NRelevantsPerQuery[i]*sizeof(int));
           Nrelevants = 0;
          /* Get its class */
           qclass = queriesCls[i];
          /* For each element in the dataset */
          bestS=-99999;
          p1=0;
          for (j=0; j < Ndataset; j++)
          {            
               s = S[i*Ndataset + j];
              /* Precision at 1 part */
              if (queriesIdx[i]!=j && s > bestS)
              {
                  bestS = s;
                  p1 = datasetCls[j]==qclass;
                  bestIdx[i] = j+1; /* Matlab style */
              }
              /* If it is from the same class and it is not the query idx, it is a relevant one. */
              /* Compute how many on the dataset get a better score and how many get an equal one, excluding itself and the query.*/
              if (datasetCls[j]==qclass && queriesIdx[i]!=j)
              {
                   better=0;
                   equal = 0;
                  for (k=0; k < Ndataset; k++)
                  {
                      if (k!=j && queriesIdx[i]!=k)
                      {
                           s2 = S[i*Ndataset + k];
                          if (s2> s) better++;
                          else if (s2==s) equal++;
                      }
                  }
                  rank[Nrelevants]=better+floor(equal/2.0);
                  Nrelevants++;
              }
          }
          /* Sort the ranked positions) */
          qsort(rank, Nrelevants, sizeof(int), sort);
          pP1[i] = p1;
          /* Get mAP and store it */
          for(j=0;j<Nrelevants;j++){
              /* if rank[i] >=k it was not on the topk. Since they are sorted, that means bail out already */
               prec_at_k =  ((float)(j+1))/(rank[j]+1);
              //mexPrintf("prec_at_k: %f\n", prec_at_k);
              pMap[i] += prec_at_k;            
          }
          pMap[i]/=Nrelevants;
      }
       return;
}

Asghar Ali 2017-3-26

编辑：James Tursa 2017-3-26

the value of

S = 200X600,

queriesClases = 1x200,

allClasses = 1x600,

NRelevantsPerQuery = 200x1,

keepQueries = 200x1

Asghar Ali 2017-3-26

Dear Geoff Hayes, above is the call of mex file and values of variables. I have tried a lot but could not find any solution.

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Answer 1

Jan 2017-3-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/331928-i-am-getting-following-errors-in-mex-file#answer_260398

编辑：Jan 2017-3-27

在 MATLAB Online 中打开

Command like this are very tricky:

queriesCls = (int*)mxGetData(prhs[1]);

Are you sure that the compiler uses the wanted number of bits? Prefer int32_T according to the type of the Matlab variable provided as input. E.g.:

plhs[2] = mxCreateNumericArray(1, dims, mxINT32_CLASS, mxREAL);
bestIdx = (int32_T *) mxGetData(plhs[2]);

[EDITED] This line looks cruel:

int *rank;
*rank = (int) malloc(NRelevantsPerQuery[i] * sizeof(int));

This would look better:

rank = (int *) malloc(NRelevantsPerQuery[i] * sizeof(int));

But even with this, rank is allocated in each iteration, but never free'd. This will leak memory.

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Asghar Ali 2017-3-27

Thank you so much Jan Simon, it is still showing the same error.

Jan 2017-3-27

What exactly does "still" mean? What did you change? All occurences of the tricky int?

See [EDITED]

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