hello, I wrote a foreach loop containing "where clauses". R indicates an
error in the compilation of the "where clause".
Could you please tell me why not right?

foreach (series. combine = c)%:% when (mydata [3] = u [1]) % Dopar% (mydata
[5] / sum (mydata [5]))

L 'error reported by R is:
Error: unexpected '=' in "foreach (series. Combine = c)%:% when (mydata [3]
="


many thanks in advance
Martina

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