Bashscripts.org

Hi!

I have several files that are all the sames, except they have different numbers inside.
I would like to write a script that can extract one particular number in every of these files and copy it to another new file, so that at the end, I have one file containing all these values I need.

Basically, in every file, there is a line which is like this :

Throughput 0.151315

So, I would like to locate this line first and then get the number that is after "Throughput" and copy this number in another file. I've been browsing how to do this but can't find the exact solution.

Can somebody help please ?
Thanks in advance!

use parameter expansion

Or

or

etc.

or

Patsie's awk one looks nicest

I like Watael's the best... it's using just bash builtins and bash parameter expansion to do the work. Very elegant.

Thanks everyone !!!
I tried Watael's one and it works, except for one thing. In my file, there are lines that looks like this :

Throughput 0.24324
ThroughputFail 3.35545
ThroughputAbort 4.34243

If I apply Watael's method, it returns the 4.34243 because of course Throughput* means all these 3 lines and the last one will overwrite everything. How can I specify I only want the line with Throughput alone ? I guess I have to say Throughput *SPACE* but how to do it ?


@Patsie + choroba : I would like to understand your lines too, that looks interesting. Could you please explain what it does and explain the syntax in details if possible ? Also, where do we specify the input filename ?

Thanks again guys!

To understand, you should read on how grep, cut, sed and awk work. These are all handy tools, so probably read their man pages or try to google some introductory texts. To specify the parameters, you can either prepend cat input | to them, or put the list of input files before the first redirection sign (| or >).

Ok thanks watael and choroba