Origin C-logplot for the dark current

#include <origin.h>
#include <math.h>
void logplot()
{
 int i;
 // define two Dataset variable and map them to the 1st and 2nd columns of the worksheet

 Dataset dsCol1("data1",0);
 Dataset dsCol2("data1",1);

 dsCol1.SetSize(251);
 dsCol2.SetSize(251);
  for(i=0;i<251;i++){
  if (dsCol2[i]<0){
  
  dsCol2[i]=log10(-dsCol2[i]*10000)
  }
  else dsCol2[i]=log10(dsCol2[i]*10000);
  
  }

}