Error using cell/ismember (line 34) Input A of class double and input B of class cell must be cell arrays of character vectors, unless one is a character vector. Error in untitled5 (line 190) if ismember(B​W6(i,j),ar​ray1)~= logical(1)

Hi I defined array1 as array1={} and I am going to iterate over all elements of a matrix and if the matrix element has not been added to the array1 before, I want to add the elemnt to array1. I wrote the if statement as below but I constantly get error. What is my mistake?Thanks

                if ismember(BW6(i,j),array1)~= logical(1)
                    array1=[array1,BW6(i,j)]
                end

I get this error:

                Error using cell/ismember (line 34)
Input A of class double and input B of class cell must be cell arrays of character vectors, unless one is a character vector.

Error in untitled5 (line 190)
                if ismember(BW6(i,j),array1)~= logical(1)

How can I solve this problem?

Answer 1

[Steven Lord]

So you want all the unique elements of the matrix? Use the unique function or if "close enough" counts use the uniquetol function instead.