Graphing log of gdp "level playing field"

[Caillin]

Hi,

I am graphing the evolution of the log of gdp for 4 countries. When I make the graph, it displays 4 separate horizontal lines which aren't very interesting. I was advised to use a 'level playing field' so I can compare the relative performance of these economies since the financial crisis. Does anyone have any idea of how I could do a nice comparative analysis of the evolution of log(gdp) for these 4 countries on a level playing field?

Thanks in advance!
Caillin

[startz]

Subtract the value of the first observation from each series. This gives you cumulative growth since the beginning of your sample.

[CharlieEVIEWS]

rebase them to 2005=100 or something