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Select list items by rule

Select list items by rule - Mathematica Tutorial

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Select list items by rule

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- When you gather data, you might be interested in analyzing just a subset of that data. For example, you might want to see total sales from days with at least $5000 in revenue. To limit the values included in a calculation, you can use the select keyword. I have opened a blank Mathematica notebook, so I need to enter in a list of values. I'll type in a variable list1 = then, because I'm defining a list, a { followed by 1, 2, 3.8, 4, 5, 6. Then, a } to close the list, and Shift + Enter, and there I see my values. Suppose I want to, create a separate list that only has the odd values from list one. To do that, I would create my new variable, I'll call it list2 =, now I want to select values, so I will use the Select command. So I've Select, [, then the name of my list, which is list1, followed by the operator that I want to use for the keyboard, and that is OddQ. So I'm looking for the odd values, and the Q indicates that it's a query. Followed by a ], Shift + Enter, and I see the…

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