MATLAB: How to use <, > operator as I intended

operator

** Matlab results**

>> y1 = [1 2 3 4 5]

y1 =

1 2 3 4 5

>> y2 = 0<y1<3

y2 =

1 1 1 1 1

In this case, why array y2's value is not [ 1 1 0 0 0 ]?

Best Answer

(y1>0) & (y1<3)

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MATLAB: Place array in a matrix

Perhaps I'm misunderstanding but if

 x = [1.0000         0
      0.5000    1.0000
      0.5000    1.5000
           0   -1.0000
     -1.0000    1.0000
      0.5000   -1.0000];

which is a 6x2 array, then wouldn't

 x*x'

be the desired 6x6 array?

MATLAB: How to operate > and > to extract a matrix

You are getting a mask for this situation

column 1 of xab is less than 6, AND
column 1 of xbc is less than 6, AND
column 1 of xcd is less than 6

In other words, where all 3 columns of those 3 different arrays are less than 6.

mask1 could be false if any of the x matrices were more than 6 but not all 3, for example 2 were 5 but one of them was 7. Qua1 should not take that row however since mask1 would be false there for that row.

Then you are taking rows where that is the case from M. However, the values of M can be ANYTHING and have no relation to what the values of the x matrices are. The values in M could be up in the millions.

If you want to clip Qua1 to 6, then you can do this:

Qua1(Qua1>=6) = 6;

Best Answer

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MATLAB: Place array in a matrix

MATLAB: How to operate > and > to extract a matrix

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