You would need to incorporate your code into one of the examples, also you would need to store the intended output as the loop progresses thorugh your examples. As a guide: (you will of course have to change the path to where you have the .csv files stored on your system)
path='H:\MATLAB\R2021a\bin\TestDir\' %directory of the csv files on your system
files = dir(strcat(path,'*.csv'))
N = length(files) ;
% loop for each file
fileNames = {files.name};
for k = 1:N
%my code on a single .csv file
T = readtable(strcat(path,fileNames{k}),'HeaderLines', 11); %read single .csf file and skip 11 lines
[numRows,numCols] = size(T);
cont=0;
tB= T(:,3); %consider 3rd column
B=table2array(tB) %consider it as an array
bvB=B(1,1); %consider the first value
i=1;
intB=zeros(numRows,1); % create an array full of zeros
newB=B(:,1)-bvB; %subtract the first value
z=numRows-1;
for cont=1:z
if (newB(i+1,1)+newB(i,1))>=0
intB(i,1)= (newB(i+1,1)+newB(i,1))/2;
else
intB(i,1)=0;
end
dbstop if error;
i=i+1;
end
%useful result
sommaB(k)=sum(intB); %Save output in a vector for each loop iteration
end
