doesn't clear subscripted variables. It won't clear these variables for example.

Subscript[x, D] = {{0.97, 0.95, 0.93, 0.94, 0.96}}
Subscript[x, B] = {{0.04, 0.05, 0.06, 0.06, 0.04}}
  • $\begingroup$ Related: mathematica.stackexchange.com/a/46239/1871 $\endgroup$ – xzczd Feb 10 '16 at 2:59
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  • $\begingroup$ You can format inline code and code blocks by selecting the code and clicking the {} button above the edit window. The edit window help button ? is also useful for learning how to format your questions and answers. You may also find this this meta Q&A helpful $\endgroup$ – Michael E2 Feb 10 '16 at 3:11
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    $\begingroup$ Please don't use subscripts until you're really proficient in Mathematica. See mathematica.stackexchange.com/a/18395/193 $\endgroup$ – Dr. belisarius Feb 10 '16 at 3:12

Subscript[x, D], etc., are expressions, not variables. Your definitions are stored as down-values of the symbol Subscript. You need to use


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