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How to create a function where if the R version is older than 3.5, it gives a warning?

R and version control for the solo data analystdata.table vs dplyr: can one do something well the other can't or does poorly?warning messages when trying to run glmer in rHow should I deal with “package 'xxx' is not available (for R version x.y.z)” warning?no visible global function definition for ‘median’At least some columns satisfy a conditionpredict.gls fails when the package “MuMin” is installed in RProblems to configure Java for using in R version 3.5.0 and use rJava and coreNLP librariesError: package or namespace load failed, object … not foundSudden errors with as.data.frame with previously used code and objects

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2

I currently have the following code to see if the current R version is not equal to 3.5.0. However, I would like to change it so that if someone has a R version older than 3.5.0, it gives a warning to update R. Because 3.5.0 is not "less than" 3.4.0, etc, I am having issues creating a boolean command, since the computer doesnt recognize 3.4.0 as being "less than" 3.5.0. Is there a way to facilitate this?

if(strsplit(version[['version.string']], ' ')[[1]][3] != '3.5.0')
 print("Warning: Update R")

r

share|improve this question

asked Mar 25 at 8:21

user321627user321627

487411

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You can either change your version string to a number or do something like: if(strsplit(version[['version.string']], ' ')[[1]][3] < '3.5.0') print("Warning: Update R")
  
  – patL
  Mar 25 at 8:26
  
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Actually '3.4.0' < '3.5.0', '3.4.9' < '3.5.0' does return TRUE but I think you still need some stricter checks.
  
  – Ronak Shah
  Mar 25 at 8:27
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  What about remove the dots as.numeric(gsub(".", "", substring(version[['version.string']], 11, 15), fixed = TRUE)) < 350
  
  – Clemsang
  Mar 25 at 8:30
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Clemsang What does fixed=TRUE do?
  
  – user321627
  Mar 25 at 8:32
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Take the dots as dots in regular expressions, otherwise it is evaluated as any character. Fixed allows to have dot as a dot.
  
  – Clemsang
  Mar 25 at 8:53
  

  
  
  
  

add a comment | 

2

I currently have the following code to see if the current R version is not equal to 3.5.0. However, I would like to change it so that if someone has a R version older than 3.5.0, it gives a warning to update R. Because 3.5.0 is not "less than" 3.4.0, etc, I am having issues creating a boolean command, since the computer doesnt recognize 3.4.0 as being "less than" 3.5.0. Is there a way to facilitate this?

if(strsplit(version[['version.string']], ' ')[[1]][3] != '3.5.0')
 print("Warning: Update R")

r

share|improve this question

asked Mar 25 at 8:21

user321627user321627

487411

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You can either change your version string to a number or do something like: if(strsplit(version[['version.string']], ' ')[[1]][3] < '3.5.0') print("Warning: Update R")
  
  – patL
  Mar 25 at 8:26
  
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Actually '3.4.0' < '3.5.0', '3.4.9' < '3.5.0' does return TRUE but I think you still need some stricter checks.
  
  – Ronak Shah
  Mar 25 at 8:27
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  What about remove the dots as.numeric(gsub(".", "", substring(version[['version.string']], 11, 15), fixed = TRUE)) < 350
  
  – Clemsang
  Mar 25 at 8:30
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Clemsang What does fixed=TRUE do?
  
  – user321627
  Mar 25 at 8:32
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Take the dots as dots in regular expressions, otherwise it is evaluated as any character. Fixed allows to have dot as a dot.
  
  – Clemsang
  Mar 25 at 8:53
  

  
  
  
  

add a comment | 

I currently have the following code to see if the current R version is not equal to 3.5.0. However, I would like to change it so that if someone has a R version older than 3.5.0, it gives a warning to update R. Because 3.5.0 is not "less than" 3.4.0, etc, I am having issues creating a boolean command, since the computer doesnt recognize 3.4.0 as being "less than" 3.5.0. Is there a way to facilitate this?

if(strsplit(version[['version.string']], ' ')[[1]][3] != '3.5.0')
 print("Warning: Update R")

r

share|improve this question

asked Mar 25 at 8:21

user321627user321627

487411

if(strsplit(version[['version.string']], ' ')[[1]][3] != '3.5.0')
 print("Warning: Update R")

share|improve this question

asked Mar 25 at 8:21

user321627user321627

487411

share|improve this question

asked Mar 25 at 8:21

user321627user321627

487411

asked Mar 25 at 8:21

user321627user321627

487411

asked Mar 25 at 8:21

user321627user321627

487411

2 Answers
2

active

oldest

votes

2

You can transform version number like 3.5.0 to 350 by removing dots. This way you can easily compare current and target version :

if(gsub(".", "", strsplit(version[['version.string']], ' ')[[1]][3], fixed = TRUE) < '350')
 print("Warning: Update R")

share|improve this answer

answered Mar 25 at 8:56

ClemsangClemsang

1,166816

add a comment | 

2

The C interface has a nice convienence function to do this. You can see how it's defined:

#define R_VERSION 197890
#define R_NICK "Eggshell Igloo"
#define R_Version(v,p,s) (((v) * 65536) + ((p) * 256) + (s))

So you can do something like this:

#include <Rversion.h>

// [[Rcpp::export]]
bool isVersionOutdated() 
#if R_VERSION < R_Version(3, 5, 1)
 return true;
#else
 return false;
#endif

R side:

library(Rcpp)
sourceCpp("test.cpp")
isVersionOutdated()
[1] FALSE

share|improve this answer

answered Mar 25 at 9:02

thcthc

6,17711225

add a comment | 

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2

You can transform version number like 3.5.0 to 350 by removing dots. This way you can easily compare current and target version :

if(gsub(".", "", strsplit(version[['version.string']], ' ')[[1]][3], fixed = TRUE) < '350')
 print("Warning: Update R")

share|improve this answer

answered Mar 25 at 8:56

ClemsangClemsang

1,166816

add a comment | 

2

You can transform version number like 3.5.0 to 350 by removing dots. This way you can easily compare current and target version :

if(gsub(".", "", strsplit(version[['version.string']], ' ')[[1]][3], fixed = TRUE) < '350')
 print("Warning: Update R")

share|improve this answer

answered Mar 25 at 8:56

ClemsangClemsang

1,166816

add a comment | 

You can transform version number like 3.5.0 to 350 by removing dots. This way you can easily compare current and target version :

if(gsub(".", "", strsplit(version[['version.string']], ' ')[[1]][3], fixed = TRUE) < '350')
 print("Warning: Update R")

share|improve this answer

answered Mar 25 at 8:56

ClemsangClemsang

1,166816

if(gsub(".", "", strsplit(version[['version.string']], ' ')[[1]][3], fixed = TRUE) < '350')
 print("Warning: Update R")

share|improve this answer

answered Mar 25 at 8:56

ClemsangClemsang

1,166816

answered Mar 25 at 8:56

ClemsangClemsang

1,166816

answered Mar 25 at 8:56

ClemsangClemsang

1,166816

2

The C interface has a nice convienence function to do this. You can see how it's defined:

#define R_VERSION 197890
#define R_NICK "Eggshell Igloo"
#define R_Version(v,p,s) (((v) * 65536) + ((p) * 256) + (s))

So you can do something like this:

#include <Rversion.h>

// [[Rcpp::export]]
bool isVersionOutdated() 
#if R_VERSION < R_Version(3, 5, 1)
 return true;
#else
 return false;
#endif

R side:

library(Rcpp)
sourceCpp("test.cpp")
isVersionOutdated()
[1] FALSE

share|improve this answer

answered Mar 25 at 9:02

thcthc

6,17711225

add a comment | 

2

The C interface has a nice convienence function to do this. You can see how it's defined:

#define R_VERSION 197890
#define R_NICK "Eggshell Igloo"
#define R_Version(v,p,s) (((v) * 65536) + ((p) * 256) + (s))

So you can do something like this:

#include <Rversion.h>

// [[Rcpp::export]]
bool isVersionOutdated() 
#if R_VERSION < R_Version(3, 5, 1)
 return true;
#else
 return false;
#endif

R side:

library(Rcpp)
sourceCpp("test.cpp")
isVersionOutdated()
[1] FALSE

share|improve this answer

answered Mar 25 at 9:02

thcthc

6,17711225

add a comment | 

The C interface has a nice convienence function to do this. You can see how it's defined:

#define R_VERSION 197890
#define R_NICK "Eggshell Igloo"
#define R_Version(v,p,s) (((v) * 65536) + ((p) * 256) + (s))

So you can do something like this:

#include <Rversion.h>

// [[Rcpp::export]]
bool isVersionOutdated() 
#if R_VERSION < R_Version(3, 5, 1)
 return true;
#else
 return false;
#endif

R side:

library(Rcpp)
sourceCpp("test.cpp")
isVersionOutdated()
[1] FALSE

share|improve this answer

answered Mar 25 at 9:02

thcthc

6,17711225

#define R_VERSION 197890
#define R_NICK "Eggshell Igloo"
#define R_Version(v,p,s) (((v) * 65536) + ((p) * 256) + (s))

#include <Rversion.h>

// [[Rcpp::export]]
bool isVersionOutdated() 
#if R_VERSION < R_Version(3, 5, 1)
 return true;
#else
 return false;
#endif

library(Rcpp)
sourceCpp("test.cpp")
isVersionOutdated()
[1] FALSE

share|improve this answer

answered Mar 25 at 9:02

thcthc

6,17711225

answered Mar 25 at 9:02

thcthc

6,17711225

answered Mar 25 at 9:02

thcthc

6,17711225