How do I restrict the data in a matrix, so that it accepts empty data or numbers greater than '0', that is, it meets any of the conditions

[Kal_Lam]

Maybe this post discussed previously should help you get your answer:

Default response in matrix

Hi @VDeom, You could use the default in a matrix question as outlined in the image below: In the survey tab of your xlsform: [Image 1] In the choices tab of your xlsform: [Image 2] In the settings tab of your xlsform: [Image 3] Data entry screen as seen in Enketo: [Image 4] Reference xlsform: Matrix Questions with Default.xls (47.5 KB) Have a great day!