set series title

[BenoitBotton]

I just discovered margaid and like it very much. However, I cannot see how to set a series title apart from at creation time. I need to set the series title once values have been accumulated and calculation done on these values. is there a way to achieve that?

pseudo code to illustrate:

for i,d:=range data{
   ...
 series[i] = m.NewSeries()
avg=0  
 for j:=0;j<len(data.x);j++{
      somevalue= f(data.y[i])
     avg+=somevalue
     series[i].Add(m.MakeValue(data.x[i],somevalue))
    }
avg:=avg/float64(len(data.x))

series[i].SetTitle("seriesname "+ strconv.FormatFloat(avg, ...)  //how do I achieve this?
}