Error while creating calculated field in Tableau

Question

I have a Baseball Player Data file. I want to create a calculated column called "Quadrant" which will categorise the types of players into 4 categories. My code is:

CASE 

WHEN ([OBP]<=PERCENTILE([OBP],50)) AND ([BB/K]<=PERCENTILE([BB/K],50))
THEN "Banjo Hitter"
WHEN ([OBP]<=PERCENTILE([OBP],50)) AND ([BB/K]>PERCENTILE([BB/K],50))
THEN "Patient Hitter"
WHEN ([OBP]>PERCENTILE([OBP],50)) AND ([BB/K]<=PERCENTILE([BB/K],50))
THEN "Solid Hitter"
WHEN ([OBP]>PERCENTILE([OBP],50)) AND ([BB/K]>PERCENTILE([BB/K],50))
THEN "Top Performer"
END

here OBP and BB/K are calculated fields. The 50th percentile is the median. I am getting an error that says "Syntax error: maybe you are missing an identifier". Can anyone help me figure out what my mistake is? I am new to tableau and practicing examples.

Answer 1

The percentile expression can be as per below image:

The below calculation is valid.

IF [OBP]<= { FIXED : PERCENTILE([OBP],0.50) }AND [BB/K]<= { FIXED :PERCENTILE([BB/K],0.50)}
    THEN "Banjo Hitter"

    ELSEIF  [OBP]<= { FIXED :PERCENTILE([OBP],0.50)} AND [BB/K]>{ FIXED :PERCENTILE([BB/K],0.50)}
    THEN "Patient Hitter"

    ELSEIF [OBP]> { FIXED :PERCENTILE([OBP],0.50)} AND [BB/K]<={ FIXED :PERCENTILE([BB/K],0.50)}
    THEN "Solid Hitter"

    ELSEIF [OBP]> { FIXED :PERCENTILE([OBP],0.50)} AND [BB/K]>{ FIXED :PERCENTILE([BB/K],0.50)}
    THEN "Top Performer"

    END

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