Data column(s) for axis #0 cannot be of type string error in google chart

Question

I tried to populate google chart datatable in server side using PHP.I got JSON file properply, but the Chart not display in client Application. I got error-Data colu

Answer 1

If the Data format should be like:

data: [
    ["string", "string"], //first Column
    ["string1", number],
    ["string2", number],
    ["string3", number],
]

then you can overcome this error.