Question

We shall assume that we are given a vector g of positive and negative numbers and of arbitrary length. The objective is to create a script that performs the same function as the expression

ind x=find(g>a)
where a is specified by the user. We shall check the script with a=4 and with the vector g=[4,4,7,10,−6,42,1,0].

Answer 1

The question asked for the creation of a script that identifies indices of vector elements greater than a given value. The script iterates over each element of the vector, compares it with the value, and stores the index if the element is greater. Using the example provided and a value of 4, the indices of the vector [4,4,7,10,-6,42,1,0] that are greater than 4 would be [3, 4, 6].

Step-by-step explanation:

The student has asked to create a script that finds all the indices of elements in a vector g that are greater than a specified number a. To accomplish this without using the find function directly, one can iterate over each element in the vector and conditionally check if it is greater than a. When a is 4 and with the example vector g=[4,4,7,10,−6,42,1,0], the script would need to return the indices of elements greater than 4 which are 7, 10, and 42 in this case.

Here's a simple way to write the script in MATLAB or Octave:

function indices = find_indices_greater_than_a(vector, a)
indices = [];
for i = 1:length(vector)
if vector(i) > a
indices = [indices, i];
end
end
end

For the given vector and a=4, calling find_indices_greater_than_a(g, 4) would return [3, 4, 6] as output.