refurbished bars?? - page 2

[Carl Schreiber]

WHRoeder:

How many times do you need to be told.

1. You have to resize non-buffer arrays
2. You have to move the elements
3. Did you bother to look at my resizeBuffer that does both? Obviously not!
4. Decrement unnecessary. Did you bother to look at the link? Obviously not!
   

Thanky you WHRoeder for having so much patience with me.
I wasn't aware that you use the 'side-effect' of ArrayResize that doesn't change the content of that array if possible.

But what still bothered me was that your solution continuously increases the size of the arrays been shifted.
And the size of Bars in many time is not needed.
So I tied to find a solution that make me feel better.

This solution uses your idea, shifts the content but the size if the array remains the same.

Of course the correct handing of this function differs now.

extern int ArraySizeWanted = 1000;

double indi[];

int start() {
   static datetime tLastCalcBar=-1;
   int sz,b,iBarToCalc,counted_bars=IndicatorCounted();
//---- check for possible errors
   if(counted_bars<0) return(-1);
//---- last counted bar will be recounted
   if(counted_bars>0) counted_bars--;
   int limit=Bars-counted_bars-1;

        if ( tLastCalcBar != Time[0] ) { // calBr[0] 
                iBarToCalc = MathMin( ArraySizeWanted, iBarShift(NULL, 0, tLastCalcBar) );
                tLastCalcBar = Time[0];
                for( b=iBarToCalc;b>0;b--){ // only up to bar[1]
                    if ( b == iBarToCalc ) {
                        if ( counted_bars < 1 ) // first time, array at size 0
                                sz = shiftBuffer(b, indi, ArraySizeWanted );
                        else
                                sz = shiftBuffer(b, indi);
                     } // end ini 'oldest' Bar(s)
                     if ( counted_bars < 1 ) { // to set the ini. content
                        counted_bars = 1;
                        b--; // => b == sz-1
                        indi[b] = ini();
                        b--;
                     }
                     indi[b] = whatever( indi[b+1], ...);
                 }// end foreach Bar b
          }// end newBar
          b=0;
          indi[b] = whatever( indi[b+1], ...);
          // ...
} // start()
//////////////////////////////////////////////////////////////////////////////////////////
int shiftBuffer(int add, double& b[], int newSize=0){ // buffer can be 1D or 2D, Shift values B[2]=B[1]; B[1]=B[0]
   ArraySetAsSeries(b, false); 
   if ( newSize > 0 ) ArrayResize(b, newSize); // add or remove org. size always at the end
   int sz = ArrayRange(b,0);
   if ( ArrayResize(b, sz+add) <= 0)      // add [sz]=0.0 
      { Alert("DisableTrading(ArrayResize("+sz+1+") failed: " + GetLastError() );  return(-1); }
   ArraySetAsSeries(b, true);           // now b[sz]=>b[0], b[sz-1]=>b[1], ..
   if ( ArrayResize(b, sz)   <= 0)      // eliminate b[sz], last now b[sz-1]
      { Alert("DisableTrading(ArrayResize(" +sz+ ") failed: " + GetLastError() );  return(-1); }
   return(sz);                                                  // return new (and old) size
}

Hope you don't mind,

thanks a lot anyway!

Gooly