I have a table with values created with a categorization that I do not know. I would like to convert these into double array for normal manipulation. However, the following code gives me a categorical array that cannot be manaipulated easily by normal operations.
Converting it into a double, it yield values that are not the same as what is contained in the table.
Can someone please explain what the vector y1 represents and how I can use that to get the double array that is not categorical.