Most numbers in R are represented in double. Transaction, as you've defined it, returns a list of two vectors. Numeric data has mode numeric, but it has one of three types: integer, single precision, and double precision.
a logical value if whattest or a vector otherwise. [[, however, returns an object of the class of the item contained in the list: > Day class(Day)Įrror in Day + 1 : non-numeric argument to binary operator a vector of character strings to count as numeric values, other than. As we pointed out before, setting a seed in R is useful when working with simulation studies. R automatically converts between these two classes when needed for mathematical purposes. We had to do this because R automatically removes all leading zeros for numeric data objects. Because Day is a list, subsetting with [ will return a list, not a numeric vector. The two most common numeric classes used in R are integer and double (for double precision floating point numbers). If numbers need to remain numeric values, use Option 2. Your error lies in the use of [ instead of [[. When you see that error message, it means that you are (or the function you're calling is) trying to perform a binary operation with something that isn't a number.
R only knows how to apply + (and other binary operators, such as -) to numeric arguments: > 1 + 1Įrror in 1 + "one" : non-numeric argument to binary operator Note that the produced value isn't necessarily different from the operands (e.g., 1 + 0 = 1). However, when we want to change several variables to numeric simultaneously, the approach of Example 1 might be too slow (i.e.
If you just convert it with as.numeric, it will give you the numeric coding of the. In Example 1 we used the as.numeric and the as.character functions to modify one variable of our example data. However, converting a factor to a numeric vector is a little trickier. + is one such operator: "1 + 1" takes two operands (1 and 1) and produces another value (2). Example 2: Change Multiple Columns to Numeric. is the 'binary operator' your error is referencing, and either CurrentDay or MA (or both) are non-numeric.Ī binary operation is a calculation that takes two values (operands) and produces another value ( see wikipedia for more). Because your question is phrased regarding your error message and not whatever your function is trying to accomplish, I will address the error.