delete element from txt file

hi, is there a way to delete element from txt file . I have files ,I want delete the first two elements in each file.

 the structure of my file(1) as:
1:
text.....
 file(2)
2:
text.....
etc.
I want to delete 1:, 2:, 3: etc...

thanks

Answer 1

[Walter Roberson]

It is greatly recommended that if you need to delete something from a text file, that you copy the parts that you want to keep to a new file, possibly renaming files afterwards. Deleting text from an existing file is messy.

[huda nawaf]

hi,

I read stream of files using dir, then use textscan.

the problem there is unwanted values in each of files.

for ex.

unwanted values are 1:,2:,etc from aove files.

I want to delete it , then use textscan.

can textscan avoid these values when scan file?

thanks

txt

In each file, there is

[Walter Roberson]

The 1:, 2: and so on: if there is only one such line per file and it is the first line of the file, then specify 'HeaderLines', 1 when you textscan.

If there are multiple instances per file, then is there always the same number of lines between instances?

[huda nawaf]

yes, each file has one such line, and the first line.

But, I did help HeaderLines, there is no.

how use it please. thanks

[huda nawaf]

4:

1666394,3,2005-04-19

1759415,4,2005-04-22

1959936,5,2005-11-21

998862,4,2004-11-13

2625420,2,2004-12-06.

I don't want 4:

I used

c = textscan(f,'%f %f %s','headerLines',1);

I got:

c =

[1666394] [] {}

how I can textscan to return c{1} as:

1666394

1759415

1959936

998862

2625420

thanks

[Walter Roberson]

c = textscan(f,'%f %f %s','Delimiter',',','headerLines',1);