What does Error object myvariable not found mean

Question

I got the error message      Error  object  x  not found   Or a more complex version like      Error in mean x             error in evaluating the argument  x  in selecting a method for function  mean   Error  object  x  not found   What does this mean

User · Answer

I had a similar problem with R-studio  When I tried to do my plots  this message was showing up    Eventually I realised that the reason behind this was that my  window  for the plots was too small  and I had to make it bigger to  fit  all the plots inside    Hope to help

User · Answer

Let s discuss why an  object not found  error can be thrown in R in addition to explaining what it means   What it means  to many  is obvious   the variable in question  at least according to the R interpreter  has not yet been defined  but if you see your object in your code there can be multiple reasons for why this is happening    check syntax of your declarations   If you mis-typed even one letter or used upper case instead of lower case in a later calling statement  then it won t match your original declaration and this error will occur  Are you getting this error in a notebook or markdown document   You may simply need to re-run an earlier cell that has your declarations before running the current cell where you are calling the variable  Are you trying to knit your R document and the variable works find when you run the cells but not when you knit the cells   If so - then you want to examine the snippet I am providing below for a possible side effect that triggers this error    r sourceDataProb1  echo F  eval F        some code here    The above snippet is from the beginning of an R markdown cell   If eval and echo are both set to False this can trigger an error when you try to knit the document   To clarify  I  had a use case where I had left these flags as False because I thought i did not want my code echoed or its results to show in the markdown HTML I was generating   But since the variable was then used in later cells  this caused an error during knitting   Simple trial and error with T F TRUE FALSE flags can establish if this is the source of your error when it occurs in knitting an R markdown document from RStudio   Lastly   did you remove the variable or clear it from memory after declaring it    rm   removes the variable hitting the broom icon in the evironment window of RStudio clearls everything in the current working environment ls   can help you see what is active right now to look for a missing declaration  exists  x   - as mentioned by another poster  can help you test a specific value in an environment with a very lengthy list of active variables

User · Answer

The error means that R could not find the variable mentioned in the error message   The easiest way to reproduce the error is to type the name of a variable that doesn t exist    If you ve defined x already  use a different variable name    x    Error  object  x  not found   The more complex version of the error has the same cause  calling a function when x does not exist   mean x     Error in mean x          error in evaluating the argument  x  in selecting a method for function  mean   Error  object  x  not found   Once the variable has been defined  the error will not occur   x  lt - 1 5 x     1  1 2 3 4 5      mean x      1  3     You can check to see if a variable exists using ls or exists   ls            lists all the variables that have been defined exists  x     returns TRUE or FALSE  depending upon whether x has been defined      Errors like this can occur when you are using non-standard evaluation   For example  when using subset  the error will occur if a column name is not present in the data frame to subset   d  lt - data frame a   rnorm 5   subset d  b  gt  0     Error in eval expr  envir  enclos    object  b  not found     The error can also occur if you use custom evaluation   get  var    package stats    returns the var function get  var    package utils      Error in get  var    package utils     object  var  not found   In the second case  the var function cannot be found when R looks in the utils package s environment because utils is further down the search list than stats        In more advanced use cases  you may wish to read    The Scope section of the CRAN manual Intro to R and demo scoping  The Non-standard evaluation chapter of Advanced R

User · Answer

While executing multiple lines of code in R  you need to first select all the lines of code and then click on  Run   This error usually comes up when we don t select our statements and click on  Run

[r] What does "Error: object '<myvariable>' not found" mean?

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