R Mutate Produces Error 'Must Be Size 1, Not 10' New update

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Question: R mutate produces error ‘Must be size 1, not 10’
Time: Asked 100 minute ago
Modified: Askeded 193 hours ago
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R mutate produces error ‘Must be size 1, not 10’

The error message “Must be size 1, not 10” typically occurs when you are using the mutate function in dplyr package to create a new column, and the result of the operation is a vector with a length that is not equal to 1, but rather 10 in your case.

This error message is telling you that the output of the mutate function should be a single value, but instead, it is returning 10 values.

Here are some possible causes and solutions:

Make sure that you are using a vectorized function in mutate. If you are using a function that returns a vector, such as strsplit, substr, or seq, you need to make sure that the length of the output is the same as the length of the input. If the lengths are not the same, you can try to use unnest or flatten functions from tidyr package to flatten the list column into individual values.
Check if you are inadvertently using an operation that returns a vector instead of a single value. For example, if you are trying to assign a new value to a column using = instead of ==, you will get this error because = returns a vector of the same length as the input column.
Make sure that you are not accidentally referencing multiple columns in the mutate function. For example, if you use mutate(df, new_col = col1 + col2) when col1 and col2 are both vectors with length 10, you will get this error message because col1 + col2 returns a vector of length 10.
If you are still having trouble, try breaking down your mutate function into smaller steps and check the output at each step. This will help you identify where the error is occurring.

I hope this helps! If you can provide more information about your specific code, I can give more specific advice.

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Error: Problem With `Mutate()` Input `..1`. X Can'T Subset Columns That Don'T Exist. · Issue #5692 · Tidyverse/Dplyr · Github — Error: Problem With `Mutate()` Input `..1`. X Can’T Subset Columns That Don’T Exist. · Issue #5692 · Tidyverse/Dplyr · Github

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R Mutate Produces Error ‘Must Be Size 1, Not 10’ New update