[Rd] Assignment of individual values to data frame columns: intentional or unintentional behavior?

[Ulrike Grömping]

Dear developeRs,

I have just discovered a strange feature when assigning some values to 
columns of a data frame: The column is matched by partial matching (as 
documented), but when assigning a value, a new column with the partial 
name is added to the data frame that is identical to the original column 
except for the changed value. Is that intentional ? An example:

sw <- swiss[1:5, 1:4]
sw
sw$Fert[1] <- 10
sw

Best, Ulrike

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* Ulrike Groemping                            *
* BHT Berlin - University of Applied Sciences *
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