accessing specific records of a given dataset

Hello! I have the following 5x4 dataset, called DB:

val =

    line    title            replyno    author        
    1       'Avensis'        1          'lui'         
    1       'Avensis'        2          'tu'          
    2       'Costs'          1          'pasquale'    
    2       'Costs'          2          'io'          
    2       'Costs'          3          'pasquale'

I want to access only records whose author is 'pasquale'. How can I do? I use new_DB = DB(DB.author=='pasquale'), but it does not work, it tells me "Undefined function 'eq' for input arguments of type 'cell'".

Thank you!

[Sebastiano delre]

I got it, I had to make the variable author nominal first: DB.author=nominal(DB.author). Then it works. Thanks anyway!

Answer 1

[Image Analyst]

Try strcmpi(), strfind(), or ismember(). Try char() if you need to convert a cell into a character string. Disclaimer: I don't work with dataset class of variables.