if statement "not enough input arguments." error

Its a mapper function and i dont know where i went wrong.

function Mapper(data, ~, intermKVStore)
Healthy = 0;
Dead = 0;
Vaccinated = 0;
if data{:,:} == "Healthy"
    Healthy = Healthy + 1;
elseif data{:,:} == "Dead"
    Dead = Dead + 1;
else
    Vaccinated = Vaccinated + 1;
end
add(intermKVStore,"Healthy",Healthy);
add(intermKVStore,"Dead",Dead);
add(intermKVStore,"Vaccinated",Vaccinated);
end

Answer 1

[Star Strider]

I have no idea what you intend, however the add function is likely not appropriate here. Consider simply concatenating instead.

Also consider using strcmp instead of the logical test for equality using ==.