How can I find the maximum value and its index in array in MATLAB

Question

Suppose I have an array  a    2 5 4 7   What is the function returning the maximum value and its index   For example  in my case that function should return 7 as the maximum value and 4 as the index

User · Answer

In case of a 2D array  matrix   you can use    val  idx    max A      2     The idx part will contain the column number of containing the max element of each row

User · Answer

You can use max   to get the max value  The max function can also return the index of the maximum value in the vector  To get this  assign the result of the call to max to a two element vector instead of just a single variable   e g  z is your array     gt  gt   x  y    max z   x    7  y    4   Here  7 is the largest number at the 4th position index

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3D case    Modifying Mohsen s answer for 3D array    M I    max  A       ind1  ind2  ind3    ind2sub size A  I

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The function is max  To obtain the first maximum value you should do   val  idx    max a     val is the maximum value and idx is its index

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This will return the maximum value in a matrix  max M1       This will return the row and the column of that value   x y  ind2sub size M1  max M1        For minimum just swap the word max with min and that s all

User · Answer

For a matrix you can use this    M I    max A       I is the index of A    containing the largest element   Now  use the ind2sub function to extract the row and column indices of A corresponding to the largest element    I row  I col    ind2sub size A  I    source  https   www mathworks com help matlab ref max html

[matlab] How can I find the maximum value and its index in array in MATLAB?

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