[R] How to turn off warnings about class name conflicts

[Daniel Nordlund]

On 2/13/2018 11:47 PM, Ayhan yuksel wrote:
> Hi,
> 
> I am using two packages (quantmod and FRAPO)
> 
> Quantmod and FRAPO both have a class names "zoo"
> 
> R is displaying the following warning when I manipulate an object of class
> zoo:
> 
> Found more than one class "zoo" in cache; using the first, from namespace
> 'quantmod'
> Also defined by ‘FRAPO’
> 
> The warning is displayed every time I manipulate a zoo object and becomes
> pretty annoying.
> 
> I searched for a solution but couldn't found.
> 
> A related but unanswered question is here:
> http://r.789695.n4.nabble.com/setOldClass-quot-xts-quot-td4714332.html
> 
> How can I turn off the warning?
> 
> Reproducible example:
> 
> library(quantmod)
> library(FRAPO)
> z<-zoo(runif(100),1:100)
> 
> 
> Session Info (I am using Microsoft R):
> 
> R version 3.4.3 (2017-11-30)
> Platform: x86_64-w64-mingw32/x64 (64-bit)
> Running under: Windows >= 8 x64 (build 9200)
> 
> 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
> 
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
> 
> other attached packages:
>   [1] FRAPO_0.4-1           timeSeries_3022.101.2 timeDate_3012.100
>   Rglpk_0.6-2
>   [5] slam_0.1-40           cccp_0.2-4            quantmod_0.4-12
>   TTR_0.23-2
>   [9] xts_0.10-1            zoo_1.8-0             RevoUtils_10.0.7
> RevoUtilsMath_10.0.1
> 
> loaded via a namespace (and not attached):
> [1] Rcpp_0.12.10     lattice_0.20-35  codetools_0.2-15 grid_3.4.3
>   curl_3.1
> [6] tools_3.4.3      compiler_3.4.3
> 
> 	[[alternative HTML version deleted]]
> 
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> and provide commented, minimal, self-contained, reproducible code.
> 

I tried your example (in a clean session) under R-3.4.3 from CRAN and 
Microsoft R Open 3.4.3.0 and did not get the message you are getting.  I 
suspect you have something in your workspace that is causing the problem.

Dan

-- 
Daniel Nordlund
Port Townsend, WA  USA