[R] Several Basic Questions

[Prof Brian Ripley]

On Tue, 20 May 2003, Minghua Yao wrote:

> I am having several basic questions that I haven't found the answer to from
> the manuals:
> 
> 1. How to remove "[1]" when a single line message is printed?

Use cat()

> 2. How to print several variables (e.g., a character string and a numeric
> variable) at the same line?

Use cat()

> 3. How to have the control of the accuracy of variables? e.g., in the
> following,
> 
> > x<-1134567.1
> > y<-0.19
> > z<-x-y
> > z
> [1] 1134567
> >
> 
> I want variable to have an accuracy of 2 digits behind the decimal point
> instead of all the digits behind the point being cut off.

Use cat, round and format:

> cat(format(round(z, 2)), "\n")
1134566.91 


These may not be explicit in the R manuals, but they are in all good books 
on R (see the FAQ).

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595