closing specific excel file

Hi all, I am opening some CSV files and then choose some columns and take an average of the last data. At the same time, I separate the name of the CSV files.

Now first, I write the name of the files in the first row. Then I want to write the numbers in matrix M in the second row. But I got an error that the file is open

clc
clear
files = subdir('C:\Users\roozm\Desktop\New folder\*.csv'); 
for i=1:numel(files)  
  filename = files(i).name;
  sheet = 1;
[filepath,name,ext] = fileparts(filename);
N{i,1}= name;
subset = xlsread(filename,sheet,'A:C');
subset2 = xlsread(filename,sheet,'F:G');
subset3 = xlsread(filename,sheet,'K:N');
subset_merged=[subset,subset2,subset3];
subset_tot=subset_merged([end-6:end-2],:);
M=mean(subset_tot);

end
N=N';
xlswrite('resultset',N);

Can you please advise how can I close the excel file that I have the name in it, and then write the numbers in matrix M in it?

[Walter Roberson]

Which file is it saying is already open? Which directory should the file go into? Should it go into your current directory, or should it go into C:\Users\roozm\Desktop\New folder ?

Is it the matrix N that you want to write?

[Roozbeh Yousefnejad]

I think I found the mistake. I have opened the file myself and it seems that xlswrite won't open files and it writes into an excel file without opening it Now my issue is that the names are written in the first row of this excel file, and I want to start from the second row and write the numbers. How can I do that?

[dpb]

Use the optional Range inputs to xlswrite

[Roozbeh Yousefnejad]

great, thanks