[R] Output and history

[Daniel Mastropietro]

Hello,

I have the following two questions, rergarding:

(Output)
1) Is it possible to have the output of a command automatically displayed, 
without explicitly requesting it after the command, and without using the 
print() function? For example, I want to see the value of 'a'  when I write 
for instance 'a <- rep(1,10)'.
I tried setting the 'echo' option to TRUE but it has no effect on that.

(History)
2) Is there a way to selectively recall a previously typed command based on 
the first characters of the command?
I am thinking of something similar to this: if one types 'pl' at the prompt 
and then preses the up arrow key, only the commands starting with 'pl' will 
show up in the command line.


Thanks
Daniel Mastropietro

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