public class histo
    {
        System.Drawing.Graphics zona_des;
        System.Drawing.SolidBrush rad = new System.Drawing.SolidBrush(Color.Black);
        int x0;
        int y0;
        int w;
        int h;
        double val_max,val_min;
        int nrv;
        public void setval(double[] vals, Color culoare_afisare, Color culoare_fundal)
        {
            System.Drawing.Pen creion = new System.Drawing.Pen(culoare_afisare, 4);
            System.Drawing.SolidBrush rad = new System.Drawing.SolidBrush(culoare_fundal);
            int val;
            // sterg
            zona_des.FillRectangle(rad, x0 + 1, y0 + 1, w + 10, h + 2);
            //desenez
            double factor_s=System.Convert.ToDouble(h) / (val_max - val_min); // factor de scala
            for (int i = 0; i < nrv; i++)
            {
                val = System.Convert.ToInt16((vals[i] - val_min) * factor_s); //scalare
                zona_des.DrawLine(creion, x0 + (i+1) * 10, y0+h+ Convert.ToInt16(val_min*factor_s), x0 + (i+1) * 10, y0 + h - val);
            }
        }
        public histo(System.Drawing.Graphics desen, int pozx, int pozy, int nr_valori, int inaltime, double vmin, double vmax)
        {
            nrv = nr_valori;
            zona_des = desen;
            x0 = pozx;
            y0 = pozy;
            w = nr_valori * 10;
            h = inaltime;
            val_max = vmax;
            val_min = vmin;
        }
    }