How to select values in a vector

Hello,

My vector has sets of values every certain time (this time is variable) and I would like a new vector (with the same size as the 'posicaofinal' vector) with only the first two values of each set of values. For example: If I have 8 values, I only choose the first 2. If I have 1 value (this happens), I discard this value from the new array. Basically I'm just picking the first pairs of values.

Thanks in advance.

Answer 1

[Sajid Afaque]

hello ,

as i have understood from your description i have framed a solution.

Yes for sure the below code can be optimised further, but ill leave this task for you.

Hope this helps

%make a copy of your data and work on that
copy_data = posicaofinal;
count = 1; % number of successive non adjacent number you need, here you need two non zero numbers from a group
for i = 1 : 1 : numel(copy_data)
    
    if copy_data(i) == 0
        count = 1; 
        continue;
    else
        
        %check whether the adjacent values of the current data are 0 i.e.
        %this group has only one non zero value
        if i == 1
            singularity_condition = (copy_data(i+1) == 0);
        elseif i == numel(copy_data)
            singularity_condition = (copy_data(i-1) == 0);
        else
            singularity_condition = (copy_data(i+1) == 0 && copy_data(i-1) == 0);
        end
        
        
        %below code discards single non zero value and if there are group
        %of non zeroes together , then replace all the values of the group
        %except for starting two values
        if singularity_condition
            copy_data(i) = 0;
        else
            if count < 3
                count = count+1;
                continue;
            else
                copy_data(i) = 0;
            end
        end
        
    end
    
end
%copy_data is your new data with same length as posicaofinal

[Sajid Afaque]

@Jórdan Venâncio Leite did that work ?

[Jórdan Venâncio Leite]

Hi @Sajid Afaque I haven't tested it yet