error "Undefined function 'atan2' for input arguments of type cell"

I want to calculate ATAN(X,Y) where X=data(:,2); and Y=data(:,3); from a CSV file. The output of X is 1801X1 cell and Y is 1801X1 cell. please let me know how to convert the values of X and Y to calculate ATAN

[Krishna Pradeep Gollamahanti]

please find the test file as suggested

Answer 1

[Walter Roberson]

    RotAngle = data{2};
    Bx = data{4};
    Bz = data{5};

[Krishna Pradeep Gollamahanti]

Now i can see the data of Bx and Bz with the below error

    Bx=data{4};
    Bz=data{5};
    Angle=atan2(Bx,Bz)/pi()*180;

 Undefined function 'atan2' for input arguments of type 'cell'.

[Walter Roberson]

Sorry, I did not read your code properly.

What you want to do cannot be done. It is not possible to calculate the arctan of a string. But if you ever encounter a file that has numbers in columns then you could textscan using a numeric format and then use the method I showed.