Dear Experts,

I need to include the repeated structure in our data set object,
recall.sums.df, before using gls function.
Thus I used groupedData.
But I encountered error messages which may mean '*' is not not meaningful
factor.

Please let me know what I have to do.
Thanks,

Jeong

> recall.sums.df[0:10, ]
   recall.values recall.ind subj replication hemi region group
1         17.515   rL_GM_T1    1           1    1      1     1
2         18.830   rL_GM_T1    2           1    1      1     1
3         16.477   rL_GM_T1    3           1    1      1     1
4         20.905   rL_GM_T1    4           1    1      1     1
5         18.005   rL_GM_T1    5           1    1      1     1
6         19.533   rL_GM_T1    6           1    1      1     1
7         17.126   rL_GM_T1    7           1    1      1     1
8         19.910   rL_GM_T1    8           1    1      1     1
9         17.881   rL_GM_T1    9           1    1      1     1
10        21.159   rL_GM_T1   10           1    1      1     1

> longs <- groupedData(recall.values~region* hemi* group* replication |
subj, data = recall.sums.df)
Warning messages:
1: In Ops.factor(region, hemi) : * not meaningful for factors
2: In Ops.factor(region * hemi, group) : * not meaningful for factors
3: In Ops.factor(region * hemi * group, replication) :
  * not meaningful for factors

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