x = [12 54 21 36 27 19 16 78 65 43 38 91 5 8 3 18] how can i find elements of x (the values of x) such that xi<=30 and 30<=xi<=50

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Waleed Alrabghi
Waleed Alrabghi 2016-2-18
回答： Jan 2016-2-19
x = [12 54 21 36 27 19 16 78 65 43 38 91 5 8 3 18] how can i find elements of x (the values of x) such that xi<=30 and 30<=xi<=50

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Jon
Jon 2016-2-18
编辑：Jon 2016-2-18
Look at the find() function. You can use logical operators like < , > , and = . Just try some things and see what happens.
Jan
Jan 2016-2-19
A further hint: "30<=xi<=50" might be misleading, because Matlab processes such terms from right to left. Therefore you need to connect the two relations by an and():
30 <= x & x <= 50

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