Verify if r-package

[rr1234]

Hi All,

I am trying to check if a specific R-package is installed or not and I am using these commands:

    packages <- c("ggplot2")
    a<-installed.packages()
    packages<-a[,1] 
   is.element("boot", packages)

I get the output as TRUE

When I check for some fictitious package like tidyrrr

    packages <- c("tidyrrr")
    a<-installed.packages()
    packages<-a[,1] 
   is.element("boot", packages)

I still get the same output TRUE. hence my question is:
How do I check to see if a specific package is installed or not?

Thanks
Raj

[andresrcs]

Use the %in% operator

packages <- installed.packages()
"ggplot2" %in% packages[,1]
#> [1] TRUE
"tidyrrr" %in% packages[,1]
#> [1] FALSE

^{Created on 2020-10-13 by the reprex package (v0.3.0)}

[rr1234]

@andresrcs

packages <- installed.packages()
"ggplot2" %in% packages[,1]
#> [1] TRUE
"tidyrrr" %in% packages[,1]
#> [1] FALSE

This works like a charm. You Sir are a genius!!!! I couldn't find this explained clearly anywhere on the web. Thanks a ton

[andresrcs]

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