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How do I check if two objects, e.g. dataframes, are value equal in R?
By value equal, I mean the value of each row of each column of one dataframe is equal to the value of the corresponding row and column in the second dataframe.
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We can use the compare package in R. We can easily use this package to compare two data frames and check out the summary of what extent it is changed. The function comparedf() is used to compare two dataframes in R. The function takes two dataframes and then check them for comparison.
We can compare two columns in R by using ifelse(). This statement is used to check the condition given and return the data accordingly.
It is not clear what it means to test if two data frames are "value equal" but to test if the values are the same, here is an example of two non-identical dataframes with equal values:
a <- data.frame(x = 1:10) b <- data.frame(y = 1:10) To test if all values are equal:
all(a == b) # TRUE To test if objects are identical (they are not, they have different column names):
identical(a,b) # FALSE: class, colnames, rownames must all match. In addition, identical is still useful and supports the practical goal:
identical(a[, "x"], b[, "y"]) # TRUE If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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