Error in Confusion Matrix : the data and reference factors must have the same number of levels

I’ve trained a Linear Regression model with R caret. I’m now trying to generate a confusion matrix and keep getting the following error:

Error in confusionMatrix.default(pred, testing$Final) : the data and reference factors must have the same number of levels

EnglishMarks <- read.csv("E:/Subject Wise Data/EnglishMarks.csv", 
header=TRUE)
inTrain<-createDataPartition(y=EnglishMarks$Final,p=0.7,list=FALSE)
training<-EnglishMarks[inTrain,]
testing<-EnglishMarks[-inTrain,]
predictionsTree <- predict(treeFit, testdata)
confusionMatrix(predictionsTree, testdata$catgeory)
modFit<-train(Final~UT1+UT2+HalfYearly+UT3+UT4,method="lm",data=training)
pred<-format(round(predict(modFit,testing)))              
confusionMatrix(pred,testing$Final)

The error occurs when generating the confusion matrix. The levels are the same on both objects. I cant figure out what the problem is. Their structure and levels are given below. They should be the same. Any help would be greatly appreciated as its making me cracked!!

> str(pred)
chr [1:148] "85" "84" "87" "65" "88" "84" "82" "84" "65" "78" "78" "88" "85"  
"86" "77" ...
> str(testing$Final)
int [1:148] 88 85 86 70 85 85 79 85 62 77 ...

> levels(pred)
NULL
> levels(testing$Final)
NULL

Related Posts:

  1. How do I select the first row in an R data frame that meets certain criteria?
  2. Poker hand range chart visualization in R
  3. Error in plot.new() : figure margins too large, Scatter plot
  4. How to join (merge) data frames (inner, outer, left, right)
  5. rbind error: “names do not match previous names”
  6. rbind error: “names do not match previous names”
  7. $ operator is invalid for atomic vectors for dataframe R
  8. adding x and y axis labels in ggplot2
  9. Set NA to 0 in R
  10. R: Using equation with natural logarithm in nls
  11. kmeans complains “NA/NaN/Inf in foreign function call (arg 1)”, when there are none?
  12. Why use as.factor() instead of just factor()
  13. Update R using RStudio
  14. mean() warning: argument is not numeric or logical: returning NA
  15. ‘x’ and ‘y’ lengths differ ERROR when plotting
  16. What does “Error: object ‘‘ not found” mean?
  17. mean() warning: argument is not numeric or logical: returning NA
  18. Difference between paste() and paste0()
  19. How do I delete rows in a data frame?
  20. Error in grid.Call(L_textBounds, as.graphicsAnnot(x$label), x$x, x$y, : Polygon edge not found
  21. Remove duplicated rows
  22. Drop data frame columns by name
  23. How to find the statistical mode?
  24. Error in colMeans(x, na.rm = TRUE) : ‘x’ must be numeric in KNN classification
  25. Error in ggplot.data.frame : Mapping should be created with aes or aes_string
  26. Editing legend (text) labels in ggplot
  27. case_when in mutate pipe
  28. “Error: Continuous value supplied to discrete scale” in default data set example mtcars and ggplot2
  29. Logistic Regression on factor: Error in eval(family$initialize) : y values must be 0 <= y <= 1
  30. Error: Incorrect number of dimensions in R
  31. dim(X) must have a positive length when applying function in data frame
  32. Basic – T-Test -> Grouping Factor Must have Exactly 2 Levels
  33. Error: attempt to use zero-length variable name
  34. How to debug “contrasts can be applied only to factors with 2 or more levels” error?
  35. R error: cannot coerce type ‘closure’ to vector of type ‘double’
  36. Error in lm.fit(x, y, offset = offset, singular.ok = singular.ok, …) : NA/NaN/Inf in ‘y’, tried every possible way
  37. Error in lm.fit(x, y, offset = offset, singular.ok = singular.ok, …) 0 non-na cases
  38. Why I get this error writing data to a file
  39. How to save a data frame as CSV to a user selected location using tcltk
  40. Error in lis[[i]] : attempt to select less than one element
  41. Plot a line graph, error in xy.coords(x, y, xlabel, ylabel, log) : ‘x’ and ‘y’ lengths differ
  42. How to compute weighted mean in R?
  43. Subscript out of bounds – general definition and solution?
  44. R: Error in eval(predvars, data, env) : numeric ‘envir’ arg not of length one in intrinsic.pars() in multgee package
  45. Calculate correlation for more than two variables?
  46. Convert a list to a data frame
  47. How to count the number of observations in R like Stata command count
  48. Remove all of x axis labels in ggplot
  49. Create an empty data.frame
  50. Can’t draw Histogram, ‘x’ must be numeric
  51. How can I plot data with confidence intervals?
  52. MLE error in R: initial value in ‘vmmin’ is not finite
  53. Rename multiple columns by names
  54. Unimplemented type list when trying to write.table
  55. What is the difference between rm() and rm(list=ls())?
  56. Remove rows with all or some NAs (missing values) in data.frame
  57. Subscript out of bounds – general definition and solution?
  58. Convert date-time string to class Date
  59. Reshaping data.frame from wide to long format
  60. Remove rows with all or some NAs (missing values) in data.frame
  61. How to set limits for axes in ggplot2 R plots?
  62. duplicate ‘row.names’ are not allowed error
  63. predict.lm() in a loop. warning: prediction from a rank-deficient fit may be misleading
  64. Nested ifelse statement
  65. Convert categorical variables to numeric in R
  66. How do I get RSS from a linear model output
  67. Warning message: In `…` : invalid factor level, NA generated
  68. Mean of a column in a data frame, given the column’s name
  69. How to overcome error:”attempt to set ‘colnames’ on an object with less than two dimension” in xts object
  70. grep using a character vector with multiple patterns
  71. remove all variables except functions
  72. Error: Invalid input: date_trans works with objects of class Date only
  73. How to avoid “Error in stripchart.default(x1, …) : invalid plotting method” error?
  74. Matrix expression causes error “requires numeric/complex matrix/vector arguments”?
  75. ‘height’ must be a vector or a matrix. barplot error
  76. NAs are not allowed in subscripted assignments
  77. install.packages fails in knitr document: “trying to use CRAN without setting a mirror”
  78. How to convert a data frame column to numeric type?
  79. How do I install an R package from source?
  80. How can I convert Json to data frame in R
  81. Optimization of a function in R ( L-BFGS-B needs finite values of ‘fn’)
  82. Error in eval(predvars, data, env) : invalid ‘envir’ argument of type ‘character’
  83. Error in : target of assignment expands to non-language object
  84. run a for loop in parallel in R
  85. How do I combine two data-frames based on two columns?
  86. Efficiently sum across multiple columns in R
  87. How to eliminate “NA/NaN/Inf in foreign function call (arg 7)” running predict with randomForest
  88. Indicator function in R
  89. IF “OR” multiple conditions
  90. R4DS error comparison (1) is possible only for atomic and list types
  91. Replace all 0 values to NA
  92. Error in x[[i]] : recursive indexing failed at level 2
  93. Merge error : negative length vectors are not allowed
  94. non-numeric argument to binary operator
  95. How to avoid “operations are possible only for numeric, logical or complex types” when computing top 3 elements in each group
  96. Column standard deviation R [duplicate]
  97. Difference between as.POSIXct/as.POSIXlt and strptime for converting character vectors to POSIXct/POSIXlt
  98. invalid (do_set) left-hand side to assignment in R
  99. How do I print a hexadecimal number with leading 0 to have width 2 using sprintf?
  100. In R, dealing with Error: ggplot2 doesn’t know how to deal with data of class numeric

Leave a Comment

tech