Acces to element of matirx

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Dani D 2016-2-27

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回答： Star Strider 2016-2-27

Hello, I want check element of matrix no value element of matrix. but i have an error,

   for i=1:row
          for j=1:co
               if ((i,j) >=A && (i,j) <B)

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per isakson 2016-2-27

编辑：per isakson 2016-2-27

"element of matrix no[t] value element of matrix" &nbsp What do you mean?
What error do you have?
A and B what class are they?

dpb 2016-2-27

在 MATLAB Online 中打开

Don't understand what no "value element of matrix" means, precisely, but your expression in the if is missing a reference to an array by the subscripting expression. Something like

if (x(i,j) >=A && x(i,j) <B)

would serve to compare the elements of the array x to A and B presuming the latter are constants. Of course, w/ Matlab, you don't need the loop at all, simply

ix=(x>=A & x<B);

will return a logical array of True|False (1|0 numerically).

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Answer 1

Star Strider 2016-2-27

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在 MATLAB Online 中打开

I believe something like this is what you want:

Matrix = randi(9, 5)                            % Create Data
A = 4;
B = 6;
Result = (Matrix >= A) & (Matrix <= B)          % Logical Matrix
Matrix =
     9     7     6     3     9
     4     5     8     8     7
     7     5     8     1     5
     2     9     6     5     5
     1     6     2     2     1
Result =
     0     0     1     0     0
     1     1     0     0     0
     0     1     0     0     1
     0     0     1     1     1
     0     1     0     0     0