root = '/home/bcarry/work/data/euclid/'
  readcol, root+'element_com.csv', nom,  code, ep, p,q,e,pom,gom,i,$
           format='(A,A,D,F,F,F,F,F,F)', delimiter=',', /Silent

  a = q/(1.-e)
  cgplot, a,e,psym=4, xr=[0.1,100],/xlog


end