How to generate -1, 0 and 1?

Question

Sagar Dutta 2019-9-19

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回答： Steven Lord 2019-9-19

I have these final values (A) which i want to convert into three distinct values "-1", "0" and "1". Is there any logic/function with which i can create these three values.

A= [ 0.6286 0.8418 0.0710 1.0000 0.0679 1.0000 -1.0000 0.9993

0.2775 -0.6166 0.1573 -0.9252 0.0696 1.0000 0.3095 -0.9932

-0.4295 0.1549 0.0091 -0.3527 -0.2070 -0.2481 0.7447 0.9579

0.8001 -0.5858 0.1576 -0.7784 0.2252 0.6288 -0.1014 -0.5635

-0.2302 0.9978 0.0942 -0.0956 0.2023 0.2124 0.1767 -0.4639

0.5237 -0.9969 -0.7340 -0.2531 0.5827 0.2777 -0.3598 0.4714

-0.3218 1.0000 -0.5890 -0.4673 0.4031 -0.1164 -0.1738 0.6229

-0.1244 -0.9800 -0.8206 -0.2040 -0.7268 -0.6902 0.0545 -0.3947]

Range of matrix A is from -1 to +1

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Answer 1

Star Strider 2019-9-19

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编辑：Star Strider 2019-9-19

在 MATLAB Online 中打开

I am not certain what result you want.

One option is the sign function:

A = [ -0.6286    -0.8418    0.0710    1.0000    0.2679    1.0000   -1.0000    0.9999];
B = sign(A)

producing:

B =
    -1    -1     1     1     1     1    -1     1

EDIT —

With your edited Question, my Answer remains the same, although the result obviously changes with your new ‘A’. (The new ‘B’ matrix becomes an appropriately-sized matrix of -1, 0, and 1, although there are no 0 values because there are no 0 values in the ‘A’ matrix.) Note that sign(0) will be 0, so that will work with an ‘A’ array with some elements being 0.

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Answer 2

Steven Lord 2019-9-19

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If you want to map ranges of values in your original data to the values -1, 0, and 1 you could discretize your data. Use the syntax that accepts X, EDGES, and VALUES.