[R] Filtering an Entire Dataset based on Several Conditions

[Jim Lemon]

Hi Paul,
Based on my guess that all values have been normalized, I would say:

mat<-(matrix(runif(16,-5,5),4))
df<-as.data.frame(mat)
df[abs(df) < 3]<-NA
df
       V1       V2       V3        V4
1       NA 4.675699 3.166625        NA
2       NA       NA       NA  3.463660
3 4.288831       NA 4.032902 -4.343869
4       NA       NA       NA        NA

Beware that this behavior of data frames may not persist in the
future. You may have to convert to a matrix and then convert the
result back again.

Jim

On Mon, May 9, 2022 at 6:24 PM Paul Bernal <paulbernal07 using gmail.com> wrote:
>
> Dear friends,
>
> I have a dataframe which every single (i,j) entry (i standing for ith row,
> j for jth column) has been normalized (converted to z-scores).
>
> Now I want to filter or subset the dataframe so that I only end up with a a
> dataframe containing only entries greater than -3 or less than 3.
>
> How could I accomplish this?
>
> Best,
> Paul
>
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