How to read input.txt?

Hello!

Would you tell me how to read .txt file like below.

aaaaaa

bbbbbb

1

200

2000

4129

4189

I would like to read first two lines as string and other lines as real.

I tried to use fscanf though, it doesn't work well.

Thank you.

[KSSV]

First two lines are strings...how you can read them as integer?

[Yasuyuki Hamanaka]

I made mistake. I edited it. Thank you.

[Stephen23]

@Yasuyuki Hamanaka: what integer do you expect the characters 'aaaaaa' to return ?

Answer 1

[Walter Roberson]

fid = fopen('input.txt');
textlines{1} = fgetl(fid);
textlines{2} = fgetl(fid);
numbers = cell2mat(textscan(fid, '%f'));
fclose(fid)

[Yasuyuki Hamanaka]

What I want to know seems to be function fgetl. I appreciate you.

[Walter Roberson]

For future reference:

There is also the closely related function fgets() . The difference between fgetl() and fgets() is that fgetl() strips the line terminators off, but fgets() leaves them in.

So when the purpose is to copy a file, then fgets() is better because it includes the original line terminators in -- if the original line terminator was CR+LF then the CR+LF will both be present for fgets() and will make it into any file that you write them to fgetl() would remove the CR+LF, so fgetl() is better for the case where you are analyzing the content and don't want to have to worry all the time about whether the original had CR+LF or LF alone.

Answer 2

[dpb]

Are the string data pertinent or just in the way of returning the numeric data?

If the former, while you can make it work with low-level i/o such as fprintf, it's the hard way to go at it -- use

readcell instead.

If the latter and the text is (say) a header line and units or similar, use readtable