How can I copy lines of an external text file to another file

Hi,

I would like to know how can I open a file, named a.txt (which in attach), and copy all the lines, from the line 5 to the end of file, to another text file, named b.txt

I thank you in advance,

Best regards,

Answer 1

[Stephen23]

tmp = readlines('a.txt');
writelines(tmp(5:end),'new.txt')

[Hugo]

Hi,

I got the following error when trying your solution:

"Unrecognized function or variable 'readlines'."

[Stephen23]

Yes, unfortunately READLINES was introduced in R2020b.

Answer 2

[Voss]

Here's one way:

fid_in = fopen('a.txt'); % input file
fid_out = fopen('b.txt','w'); % output file
for ii = 1:4 % read (and discard) the first four lines
    fgetl(fid_in);
end
data = fread(fid_in); % read the rest of the input file
fclose(fid_in); % close the input file
fprintf(fid_out,'%s',data); % write data to the output file
fclose(fid_out); % close the output file

type b.txt % check the contents of b.txt

56h
af4
ghj67
asdad23
asd8
hj768
sdf234
dh568
asd45234
fggh768
rfa423
asdas4234
isdas423
hk89
d456
v234
h671s
k78s1