if else if statement problem

Please help me if you can. I wrote this but the answer still gives me the final condition only "not identified". What is the mistake ?

for PAs = 9
    DAs = 8;
    As = 131;
    Bs = 3;
    if PAs==0
        DAs==0;
        As==0;
        Bs==0;
        disp('specimen is sound')
    elseif PAs==0:10
        DAs==0:10;
        As<100;
        Bs<2;
        disp('cap undercut')
    else
        disp('not identified')
    end
end

not identified

Answer 1

[Cris LaPierre]

The following conditional is seen as 'false' by the elseif statement.

elseif PAs==0:10

This will check PAs against every number in 0:10. It will only evaluate true (and execute the corresponding statement) if all conditions evalue 'true'

PAs=9;
PAs==0:10

ans = 1×11 logical array
   0   0   0   0   0   0   0   0   0   1   0

If you want the elseif statement to execute if any of the comparisons is true, use any

any(PAs==0:10)

ans = logical
   1

[Atsushi Ueno]

PAs = 9;
PAs == 0:10

ans = 1×11 logical array
   0   0   0   0   0   0   0   0   0   1   0

if PAs == 0:10
    disp('identified')
else
    disp('not identified')
end

not identified

if any(PAs == 0:10)
    disp('identified')
else
    disp('not identified')
end

identified