An unexpected string constant: The compiler produces such an error when we use the quotation marks in the incorrect place in R. The error might occur in the below three different scenarios.
Example 1: When a file is imported.
Let us consider an example in which we try to import a colon-delimited file as a data frame in R. The sample file taken is Sample-Spreadsheet-10-rows.csv.
# Try to import colon-delimited file read.csv("C:\\Users\\harshit\\gfg.csv", sep";")
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Output:
The R compiler produces the error because we haven’t given the equal to (=) just after the sign sep argument. Let’s add the equal to sign after the sep argument and run the program again:
# Try to import colon-delimited file read.csv("C:\\Users\\harshit\\gfg.csv", sep=";")
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Output:
Example 2: When a data is viewed:
Let us consider an example in which we want to see the values in a vector.
# Create a vector having 10 numeric values in it vect <- c(12, 8, 15, 16, 4, 7, 1, 5, 9, 18)
# Print the values vect""
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Output:
The R compiler produces an error because we mistakenly used quotations just after the vector name.
How to resolve:
We can resolve this error by simply removing the quotations:
# Create a vector having 10 numeric # values in it vect <- c(12, 8, 15, 16, 4, 7, 1, 5, 9, 18)
# Print the values vect |
Output:
Output
Example 3: While Creating Plots:
Let us consider an example in which we try to visualize the distribution of the values in a vector:
# Create a vector having 10 numeric # values in it vect <- c(12, 8, 15, 16, 4, 7, 1, 5, 9, 18)
# Trying to create boxplot and visualize # the distribution of values boxplot(vect, col'steelblue')
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Output:
The R compiler produces an error because equal to sign is missing after col.
How to resolve:
The error can be resolved by simply adding an equal to sign after the col:
# Create a vector having 10 numeric # values in it vect <- c(12, 8, 15, 16, 4, 7, 1, 5, 9, 18)
# Trying to create boxplot and visualize # the distribution of values boxplot(vect, col='steelblue')
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Output: