subtract an average value from a range

Hi,

I have a matrix of 3000x6000. Also I have some values which I treated as nose_pokes. From every nose poke value I want two things.

1) 50 columns before nose poke I want to add them and then take an average of them which in result give me a matrix of 3000x1(which becomes base line of my signal).

2) After each nose poke I have to take 100 columns and subtract the baseline from all columns one by one and rest of the data remains same.

I write down some code but I am unable to perform this task can any body help me.

I want to upload file but its too big I can't upload.

code:

fileread = csvread('Data190409_224329trial_rec_data.csv');
subdat1=reshape(fileread,[3000 length(fileread)/3000]); %array to matrix conversion
for ki= 1:1:(size(nose_pok,2)-1)
    qw1=nose_pok(ki)-80;
    qw2=nose_pok(ki)-40;
    base_rec_range = subdat1(:,qw1:qw2);
    
    range=size(base_rec_range,2);
    sum=0
    for m=1:1:range
        sum = sum + base_rec_range(:,m);
    end
    
    base_rec=sum/range;
    
    for index = 1:length(nose_pok)
       data_reshaped(:,nose_pok(index):nose_pok(index)+100)=subdat1(:,nose_pok(index):nose_pok(index)+100)-base_rec(:,1);
    end
end

[Rik]

Can you write a small example input and output pair? I have the feeling this should be relatively straightforward, but I am unsure what exactly you mean.