how do you count the number of zeros after the first 2 digits entered by a user and index that from a string matrix

the p2 color guide map should help

load('P2_ColorGuide.mat')
Thicc=["Resistor", "Color Band"];
choice= menu('Is your input a resistance or a set of colorband',Thicc);

if (choice~=1)&&(choice~=2)
    error('User did not select a value, program terminated')
end

%Task 2

if (choice == 1)
    Resistor1 = input('Enter resistance in ohms as a vecttor');
    R1 = ColorCode(Resistor1(1));
    R2 = ColorCode(Resistor1(:,2));
    find( Resistor1==0);
    zero=numel(Resistor1);
    %fprintf('The Color Band for that resistnace are:'
   
if sum(Resistor1)==0  
    error('Terminate program')
end
end

[Walter Roberson]

How is this different than https://www.mathworks.com/matlabcentral/answers/505684-array-indices-must-be-positive-integers-or-logical-values-error ?