Find the row and col of array?

i have an array

A=[0.9784 0.0102 0.0045;0.0085 0.9784 0.0730;0.9673 0.0156 0.0063];

before i get A, i create A = zeros(numTest,numLabels);

i want to find the row and col,i try

co=find(A==0.9784)

but it result Empty matrix: 0-by-1. what should i do? Thank you

Answer 1

[Image Analyst]

You should read the FAQ: http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F After that, if you still don't understand, write back.

[Tara]

sorry, but i still don't know how to find the row col in this case?

[Walter Roberson]

You don't. That value, 0.9784, does not exist in the matrix. At the command line, give the command

format long g

and then

disp(A(1))

and

disp(A(1)-0.9784)

[Image Analyst]

Try this:

[rows, columns] = find(abs(A-0.9784) < 0.00009)

In the command window:

A =
                    0.9784                    0.0102                    0.0045
                    0.0085                    0.9784                     0.073
                    0.9673                    0.0156                    0.0063
rows =
     1
     2
columns =
     1
     2

So the value happens at (1,1) and (2,2).