[R] substitute values in a vector,dataframe

[Prof Brian D Ripley]

On Thu, 31 May 2001, Frank Gerrit Zoellner wrote:

> Hi!
>
> I've got a dataframe with -Inf values inside and i want to substitute
them with 0. The dataframe is only one column. How can I do this in R?

df[df[, 1] %in% -Inf, 1] <- 0

as in

df <- data.frame(a=c(1:3, -Inf, 4))
df[df[, 1] %in% -Inf, 1] <- 0
df
  a
1 1
2 2
3 3
4 0
5 4

If there were more than one column, use lapply.


-- 
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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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