object 'x' not found
could not find function "x"
unexpected symbol in "x"
unexpected '=' in "x"
object of type 'closure' is not subsettable
cannot change value of locked binding
non-numeric argument to binary operator
non-numeric argument to mathematical function
(list) object cannot be coerced to type 'double'
invalid type (closure) for variable 'X'
cannot coerce class "X" to a data.frame
NAs introduced by coercion
character string is not in a standard unambiguous format
longer object length is not a multiple
replacement has X rows, data has Y
number of items to replace is not a multiple
replacement has length zero
missing values where TRUE/FALSE needed
missing values and NaN's not allowed
'x' contains missing values
argument is of length zero
NaNs produced
infinite or missing values in 'x'
subscript out of bounds
undefined columns selected
incorrect number of dimensions
incorrect number of subscripts on matrix
only 0's may be mixed with negative subscripts
negative length vectors are not allowed
[ ] with missing values only allowed for atomic vectors
$ operator is invalid for atomic vectors
recursive indexing failed at level X
attempt to select less than one element
attempt to select more than one element
arguments imply differing number of rows
row names supplied are of wrong length
duplicate row.names are not allowed
invalid type (list) for variable
cannot coerce class X to a data.frame
duplicate column names
names attribute must be same length as vector
non-conformable arrays
non-conformable arguments
system is computationally singular
invalid factor level, NA generated
number of levels differs
contrasts can be applied only to factors with 2 or more levels
level sets of factors are different
NAs produced
'ordered' must be a factor
unexpected symbol
argument is not of mode character
invalid multibyte string
invalid regular expression
'replacement' is not a character vector
could not find function
argument "x" is missing, with no default
unused argument
object not found
the condition has length > 1
=
==
must be length 1, not ...
by must be supplied
cols must select at least one column
Values are not uniquely identified
+
%>%
stat_count() requires x or y
Discrete value supplied to continuous scale
not enough 'x' observations
data are essentially constant
grouping factor must have 2 levels
'x' and 'y' must have the same length
NA/NaN/Inf in 'y'
contrasts can be applied only to factors
variable lengths differ
cannot open file
One or more parsing failures
Expecting numeric
cannot open the connection
could not connect to server
table ... does not exist
columns ... have mismatching types
dim(X) must have positive length
All aesthetics have length 1, but data has X rows
argument is not interpretable as logical
arguments imply differing number of rows: X, Y
bytecode version mismatch
by must specify column(s) as numbers, names or logical
Can't combine <type1> and <type2>
Can't rename columns that don't exist
Can't subset columns that don't exist
cannot allocate vector of size X
cannot change value of locked binding for 'X'
cannot change working directory
cannot open file 'X': No such file or directory
column 'X' not found
contexts stack overflow
could not find function "X"
do not know how to convert 'X' to class "Date"
embedded nul in string
ERROR: dependency 'X' is not available
Error in library(X) : there is no package called 'X'
evaluation nested too deeply
Faceting variables must have at least one value
figure margins too large
formal argument "X" matched by multiple actual arguments
geom_X requires the following missing aesthetics: Y
glm.fit: algorithm did not converge
incomplete final line found
installation of package 'X' had non-zero exit status
lazy-load database 'X' is corrupt
longer object length is not a multiple of shorter object length
missing value where TRUE/FALSE needed
more columns than column names
need finite 'xlim' values
no applicable method for 'X' applied to an object of class "Y"
object 'X' not found
package 'X' is not available for R version Y
package 'X' was built before R 4.0.0
pandoc document conversion failed
plot.new has not been called yet
promise already under evaluation
protect(): protection stack overflow
rank-deficient fit may be misleading
Removed X rows containing missing values
Rtools is required to build R packages but is not currently installed
stat_count() must not be used with a y aesthetic
there is no package called 'X'
unable to access index for repository
unexpected '=' in "X"
unexpected symbol in "X"
unused argument (X = Y)
variable 'X' has no visible binding
Warning in install.packages : unable to access index
What You’ll Learn:
Difficulty: ⭐⭐⭐ Advanced
Advanced database techniques including optimization and bulk operations.
Key Topics: - Query optimization - Indexes and performance - Transaction management - Connection pooling with pool