Question

[In MATLAB] We have an array of seven values for a number x : [ 1.92, 0.05, -2.43, -0.02, 0.09, 0.85 . 0.06] . We consider any data value in the range -0.1 <x<0.1 as erroneous value. We want to remove all such values and replace them with zeros at the end of the array.

1. Write a script using a for loop with conditional statements
2. Write a script using the find function

Answer 1

MATLAB Code:

% Code for part a
x = [ 1.92, 0.05, -2.43, -0.02, 0.09, 0.85 , 0.06];
result = [];

% err variable stores the count of erroneous value
err = 0;

% If erroneous value is found then increment by 1 else append the value to
% the result array
for i = 1:7
    if (x(i) < 0.1) && (x(i) > -0.1)
        err = err + 1;
    else
        result(end+1) = x(i);
    end 
end

% Fill rest with zeros
for i = 1:err
    result(end+1) = 0;
end

% Display the result
fprintf("The modified array for part a is:")
disp(result);






% Code for part b
x = [ 1.92, 0.05, -2.43, -0.02, 0.09, 0.85 , 0.06];

% Find the indexes of erroneous values
k = find( (-0.1 < x) & (x < 0.1) );

% err variable stores the count of erroneous value
err = length(k);

% Remove those erroneous values
x(k) = [];

% Append rest with zeros
x = [x zeros(1,err)];

% Display the output
fprintf("The modified array for part b is:")
disp(x);

Please refer to the following picture for sample execution of the above code: