I run a simple below command in R:
a <- merge(a,b,all.x=TRUE)
but suddenly this error comes and so I can't take the result of this command
cannot allocate vector of size 1.5 Gb
Do I need increase the memory? How should I do this?
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gung - Reinstate Monica
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user3041372
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operating system? R version? – cianius Jan 20 '14 at 17:41
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remove unused objects with rm(), and then gc() to release memory – user1738753 Jan 20 '14 at 18:08
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are you sure that `a` and `b` have some columns that match? You probably do not want to have all possible combinations of the two sets – Usobi Jan 20 '14 at 18:09
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they have not same rows i write a<- merge (a,b,by="ID",all.x=TRUE) in "a" one ID number have 3 or 4 reputation that was written in different rows.but in "b" one ID number have exactly one reputation and I want to write each column of "b" for all row of "a" that have the same ID. is it correct? – user3041372 Jan 21 '14 at 05:32
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I used gc() but it is not work in this situation – user3041372 Jan 21 '14 at 05:45