Read double datas

Dears,

I want to read .txt file that includes too many double type datas. ex) 1.2039 0.3944 1.4595 ... 2.5434 ... ...

I used 'fscanf' function to read this file. But, this txt file have too many entry, thus, I want to read this file from a specific position. How can I read this file from the given position?

Thanks,

Answer 1

[Titus Edelhofer]

Hi,

with fscanf you need not read all data at once but might read only N numbers (take a look at the doc). Use ftell and fseek to read the current position in the file and for moving the file pointer to that position later.

Titus

Answer 2

[Walter Roberson]

There is no way to select a specific position in a text file, other than to have already read through the text file and recorded all the potential positions of interest.

In particular there is no way to go directly to a specific line number or a specific field number within a line.

If your data file was in binary format and was all one data type, and all the sizes were consistent, then it would be possible to go directly to particular entries.