I have two columns I am trying to subtract and put into a new one, but one of them contains values that read '#NULL!', after converting over from SPSS and excel, so R reads it as a factor and will not let me subtract. What is the easiest way to fix it knowing I have 19,000+ rows of data?
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While reading the dataset using
read.table/read.csv, we can specify thena.stringsargument for those values that needs to be transformed to 'NA' or missing values. So, in your dataset it would be