gistfile1.txt

- (void)drawRect:(CGRect)rect
{
    CGContextRef context = UIGraphicsGetCurrentContext();
    [self.bgColor setFill];
    
    NSUInteger count = [self.points count];
    CGFloat prevValX;
    CGFloat prevValY;

    CGFloat deltaX = LENGTH / (count - 1);
    CGFloat deltaY = HEIGHT / (count - 1) ;
    
    //allocate data points for graph
    for(int i=1; i<count; i++){
        NSValue *currentPointValue = [self.points objectAtIndex:i];
        CGPoint currentPoint = [currentPointValue CGPointValue];
        CGPoint previousPoint = [[self.points objectAtIndex:i-1] CGPointValue];
        prevValX = previousPoint.x;
        prevValY = previousPoint.y;
        
        
    
        //Scale the graph
        CGFloat xVal = count + (deltaX * i);
        CGFloat yVal = currentPoint.y + (deltaY * i) ;