Re: Add 1 more variable to print

From:
"Alf P. Steinbach" <alfps@start.no>
Newsgroups:
comp.lang.c++
Date:
Sat, 18 Apr 2009 06:13:13 +0200
Message-ID:
<gsbk0r$fmj$1@news.motzarella.org>
* ela:

I tried to add one more variable to print by using our previous programmer's
program but failed. I tried using pointer variable but also failed. the
compilable codes are as follows and

lines following the comment
"/////////////// I want to print MCC so I add this variable here"

were added by me.


Please check the FAQ on how to post a question about Code That Does Not Work.

Sorry but unable to provide the ana files to test but I wish this problem
can still be solved by somebody.


What *is* "this problem"?

#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <assert.h>
#include <map>
#include <vector>
#include <set>
using namespace std;

const char* anaFilename = "%d.txt";


Bad idea.

char buffer[65536];
char buffer2[65536];


Bad idea.

void wrongArgv(char **argv){
 fprintf(stderr,
   "Usage: %s [select how many] [total # model] \n",\
   *argv);


Bad idea.

 exit(1);
}

int main(int argc, char **argv){
 map<char*, vector<double> > tptable;


Bad idea.

 if(argc != 3)
  wrongArgv(argv);
 int select = atoi(argv[1]);
 int all = atoi(argv[2]);
 if(select<=0 || all<=0 || select > all)
  wrongArgv(argv);
 // use map for priority queue
 map<double, int> mcc; //matthews correlation coefficient


Bad idea.

 for(int i=0; i<all; ++i){
  sprintf(buffer,anaFilename, i);


Unnecessary.

  FILE *ana = fopen(buffer, "r");
  for(int j=1; j<=17; ++j)
   fgets(buffer, sizeof(buffer), ana);

  double TP, TN, FP, FN, MCC;


Bad idea.

  {
      int zero, one;
   fgets(buffer, sizeof(buffer), ana);
   assert(3==sscanf(buffer," %d %lf %lf",&zero, &TN, &FP));
   assert(0==zero);
   fgets(buffer, sizeof(buffer), ana);
   assert(3==sscanf(buffer," %d %lf %lf",&one, &FN, &TP));
   assert(1==one);

/////////////// I want to print MCC so I add this variable here
   MCC = (TP*TN-FP*FN)/ sqrt((TP+FP)*(TP+FN)*(TN+FP)*(TN+FN));

   tptable["TP"].push_back(TP);
   tptable["TN"].push_back(TN);
   tptable["FP"].push_back(FP);
   tptable["FN"].push_back(FN);


Bad idea.

/////////////// I want to print MCC so I add this variable here
   tptable["MCC"].push_back(MCC);
  }
  assert(mcc.find(MCC)==mcc.end());


Unnecessary.

  mcc[MCC] = i;


Bad idea.

  fclose(ana);
 }
 set<int> top;
 map<double,int>::reverse_iterator riter=mcc.rbegin();


Bad idea.

 for(int i=0;
   i<select;
   ++i, ++riter){
  top.insert((*riter).second);
 }
 {
  FILE *file = fopen("Eval.txt","w");
  fprintf(file,"PPV\tNPV\tSP\tSE\tMCC\n");
  for(int i=0; i<all; ++i){
   double tp = tptable["TP"][i];
   double fp = tptable["FP"][i];
   double tn = tptable["TN"][i];
   double fn = tptable["FN"][i];


Bad idea.

/////////////// I want to print MCC so I add this variable here
   double tpmcc = tptable["MCC"][i];

     fprintf(file,"%1.3f \t%1.3f\t%1.3f\t%1.3f\n",ppv,npv,sp,se,tpmcc);


I count four % and five args.

  }
  freopen("SEL.txt","w",file);
  fprintf(file,"%d",*top.begin());
  for(set<int>::iterator it = ++top.begin();
    it!=top.end();
    ++it){
   fprintf(file," %d",*it);
  }
  fclose(file);
 }
 return 0;
}


This code is horrible.

But presumably your problem is identified by the last of my in-code comments.

Cheers & hth.,

- Alf

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