How to plot silhouette with Sørensen–Dice coefficient

Hi, how to plot silhouette with Sørensen–Dice similarity coefficient? I already have the cluster result and distance value.

clust:

1
1
2
2
2

metric:

0.25733   0.002573   0.003551   0.000677   0.002871   0.005561   0.004473   0.115495   0.232204   0.198639

I tried to plot it with:

silhouette([],clust,metric)

Result:

Silhouette value:

-0.9912
-0.9833
-0.9843
-0.9710
-0.9880

The distance value is treated as dissimilarity value. How to set matlab to use it as similarity value? It should be:

0.9912
0.9833
0.9843
0.9710
0.9880

Thanks.