[self setBounds:NSMakeRect(-margin*bounds,-margin*bounds,bounds*(1+2*margin),bounds*(1+2*margin))];
		NSRect boundsRect = [self bounds];
		CGRect pageRect = CGRectMake( boundsRect.origin.x, boundsRect.origin.y, boundsRect.size.width, boundsRect.size.height );
		CGContextRef myContext = (CGContextRef)[[NSGraphicsContext currentContext] graphicsPort];
		CGContextBeginPage(myContext, &pageRect);
		
		//
		// Draw the path
		//
		CGContextSaveGState(myContext);								// Save the context so we can add shadows
		CGContextSetShadow (myContext, shadowOffset, 5);			// Set shadow
		CGContextSetLineJoin(myContext,kCGLineJoinBevel);			// Set the join style
		CGContextSetRGBStrokeColor(myContext,0.2f,0.2f,1.0f,1.0f);	// Set the stroke color
		CGContextBeginPath ( myContext );							// Begin drawing
		for ( int i = 0 ; i < xvec.size()-1 ; i++)
		{
			CGContextMoveToPoint(myContext, xvecScaled[i], yvecScaled[i]);
			CGContextAddLineToPoint(myContext, xvecScaled[i+1], yvecScaled[i+1]);
		}
		CGContextStrokePath( myContext );
		CGContextRestoreGState(myContext);