The min function is not working, but the max function is. Help

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Shane
Shane 2014-6-16
评论： Star Strider 2014-6-16
Why is the min function working differently from the max function?
For example I have this 936x1 column and this is what happens:
min(matlabdate1982)
Error: Subscript indices must either be real positive integers or logicals.
max(matlabdate1982)
ans =
7.346826152497685e+05
Another example is if I have a simple vector: f=[1;2;3;4;5;6;7];
min(f)
ans =
35
24
56
30
36
27
17
max(f)
ans =
7
Why are these so different? Can anyone help me?

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采纳的回答

Kelly Kearney
Kelly Kearney 2014-6-16
编辑：Kelly Kearney 2014-6-16
My guess is you created a variable named min
Type
which min -all
to check.
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Kelly Kearney
Kelly Kearney 2014-6-16
Yes, rename the variable to something else and then delete the min variable. Variables in your workspace will always shadow functions of the same name, so it's good practice to avoid function-names when naming your variables.
You'll never be able to memorize all functions, but it seems the most common culprits are things like min, max, mean, sum, date, path, etc.
Star Strider
Star Strider 2014-6-16
One way to check that possibility (in the MATLAB Editor) is to right-click on the variable name, then click on ‘Help on Selection’ in the pop-up menu that appears. If the ‘Help’ window that appears says ‘No help found for ...’ you’re safe.

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