From r-help  Thu Nov 20 13:43:48 2003
From: "Pascal A. Niklaus" <Pascal.Niklaus () unibas ! ch>
Date: Thu, 20 Nov 2003 13:43:48 +0000
To: r-help
Subject: [R] Increment element of vector and efficiency
X-MARC-Message: https://marc.info/?l=r-help&m=107151315521721

Hi all,

Thanks for the incredibly quick help with the "%in%"...

There's a second question, though: I'd like to increment an element of a 
vector if a certain event occurs, e.g.

    count[event] <- count[event] + 1;         # works, but...

Is this efficient? I wonder whether R needs to subset the count vector 
on both sides of the assignment operator (i.e., twice), or whether 
there's a shortcut like "++" in C, e.g. "count[i]++" or similar?

Pascal