[R] replacing a value

[Jim Lemon]

Hi Ani,
Yes, there is something about the way your system is calculating
equality that is different from mine:

DELL Latitude laptop
Fedora 35 LINUX
R-4.1.3

Jim


On Wed, Apr 6, 2022 at 2:18 PM ani jaya <gaaauul using gmail.com> wrote:
>
> Hello Jim,
>
> Thank you for the try. I am following your step and still have the problem.
> But I know for sure now that my R/system is somewhat "broken" or I do
> not know for sure.
>
> > a
> [1] 20.00000 20.00000 14.23756 20.00000 20.00000 20.00000 16.30921
> 20.00000 20.00000 20.00000
> [11] 20.00000 20.00000 20.00000 20.00000 20.00000 14.85909 16.17894
> 20.00000 20.00000 20.00000
> [21] 20.00000 27.64041 20.00000 20.00000 20.00000 20.00000 20.00000
> 21.98571 20.00000 20.00000
> [31] 20.00000 20.00000
> > a==20
> [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> FALSE FALSE FALSE FALSE FALSE
> [17] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> FALSE FALSE FALSE FALSE FALSE
> > a[a==20]<-0
> > a
> [1] 20.00000 20.00000 14.23756 20.00000 20.00000 20.00000 16.30921
> 20.00000 20.00000 20.00000
> [11] 20.00000 20.00000 20.00000 20.00000 20.00000 14.85909 16.17894
> 20.00000 20.00000 20.00000
> [21] 20.00000 27.64041 20.00000 20.00000 20.00000 20.00000 20.00000
> 21.98571 20.00000 20.00000
> [31] 20.00000 20.00000
>
> On Wed, Apr 6, 2022 at 12:16 PM Jim Lemon <drjimlemon using gmail.com> wrote:
> >
> > Hi Ani,
> > It seems to work for me:
> >
> >  a<-c(20, 20, 14.2375646029948, 19.9999999999999, 20, 20, 16.3092078677214,
> > 20, 20, 20, 20, 20, 20, 20, 20, 14.8590932408795, 16.178935255298,
> > 20, 20, 20, 20, 27.6404077886079, 20, 20, 20, 20, 20, 21.9857063037444,
> > 20, 20, 20, 20)
> > > a==20
> > [1]  TRUE  TRUE FALSE FALSE  TRUE  TRUE FALSE  TRUE  TRUE  TRUE  TRUE  TRUE
> > [13]  TRUE  TRUE  TRUE FALSE FALSE  TRUE  TRUE  TRUE  TRUE FALSE  TRUE  TRUE
> > [25]  TRUE  TRUE  TRUE FALSE  TRUE  TRUE  TRUE  TRUE
> > > a[a==20]<-0
> > > a
> > [1]  0.00000  0.00000 14.23756 20.00000  0.00000  0.00000 16.30921  0.00000
> > [9]  0.00000  0.00000  0.00000  0.00000  0.00000  0.00000  0.00000 14.85909
> > [17] 16.17894  0.00000  0.00000  0.00000  0.00000 27.64041  0.00000  0.00000
> > [25]  0.00000  0.00000  0.00000 21.98571  0.00000  0.00000  0.00000  0.00000
> >
> > Notice that it didn't make 19.99999999999999 equal to 20, but did
> > round it up when printing the result. How do you know that it failed?
> >
> > Jim
> >
> > On Wed, Apr 6, 2022 at 12:48 PM ani jaya <gaaauul using gmail.com> wrote:
> > >
> > > Dear R-Help,
> > >
> > > I try to change a specific value here by following these:
> > >
> > > https://www.journaldev.com/39695/replace-in-r
> > > https://stackoverflow.com/questions/5824173/replace-a-value-in-a-data-frame-based-on-a-conditional-if-statement
> > > https://stackoverflow.com/questions/54615462/how-to-replace-certain-values-in-a-specific-rows-and-columns-with-na-in-r
> > > ..and many more
> > >
> > > however, it is not change anything. I believe it "should" be easy but
> > > I think I am missing something. I am afraid it is my system that has a
> > > problem but restarting r is not solve the problem.
> > > I just want to change 20 to 0 in my data.
> > >
> > > > dput(a)
> > > c(20, 20, 14.2375646029948, 19.9999999999999, 20, 20, 16.3092078677214,
> > > 20, 20, 20, 20, 20, 20, 20, 20, 14.8590932408795, 16.178935255298,
> > > 20, 20, 20, 20, 27.6404077886079, 20, 20, 20, 20, 20, 21.9857063037444,
> > > 20, 20, 20, 20)
> > >
> > > what I did:
> > > a[a==20]<-0 #fail
> > > a<-replace(a,a==20,0) #fail
> > > a[which(a==20)]<-0 #fail
> > >
> > > > sessionInfo()
> > > R version 4.1.2 (2021-11-01)
> > > Platform: x86_64-w64-mingw32/x64 (64-bit)
> > > Running under: Windows 10 x64 (build 19043)
> > >
> > > Matrix products: default
> > >
> > > locale:
> > > [1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252
> > > [3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C
> > > [5] LC_TIME=English_United States.1252
> > > system code page: 949
> > >
> > > Best,
> > > Ani
> > >
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