how to find index of matrix

 A=[1   8.5714    9.6250
    2   8.5714    9.7500
    3   8.5714    9.8750
    4   8.5714   10.0000
    5   8.7857    5.0000
    6   8.7857    5.2500
    7   8.7857    5.5000
    8   8.7857    5.7500
    9   8.7857    6.0000
    10  8.7857    6.2500
    11  8.7857    6.5000
    12  8.7857    6.7500
    13  8.7857    7.0000
    14  8.7857    7.2500
    15  8.7857    7.5000
    16  8.7857    7.7500
    17  8.7857    8.0000
    18  8.7857    8.2500
    19  8.7857    8.5000
    20  8.7857    8.7500
    21  8.7857    9.0000
    22  8.7857    9.2500
    23  8.7857    9.5000
    24  8.7857    9.7500
    25  8.7857   10.0000
    26  9.0000    5.0000
    27  9.0000    5.1250
    28  9.0000    5.2500
    29  9.0000    5.3750
    30  9.0000    5.5000
    31  9.0000    5.6250
    32  9.0000    5.7500
    33  9.0000    5.8750
    34  9.0000    6.0000
    35  9.0000    6.1250
    36  9.0000    6.2500
    37  9.0000    6.3750]

hi

I need to find the index of matrix A withe to have A=(:,1)=9 and A(:,2)=5.125

i try this

 [row,col]=find (A(:,1)==9 && A(:,2)=5.125)

i need to have a sresult equal 27

[Mario Malic]

See direction input argument in find, or try isequal and arrayfun

Answer 1

[the cyclist]

It looks like you were checking the wrong columns.

row = find (A(:,2)==9 & A(:,3)==5.125)

Also, you need to use & rather than &&.

[alize beemiel]

thank u sir

Answer 2

[dpb]

Try

[row,col]=find (A(:,1)==9 && A(:,3)=5.125)

You've got the column indices off --

If you really mean for it to be for A(:,2) then there is no solution in the above array.