triming lines using shell command

[weblover]

Hello,

i have a problem and need your help

i have a text file generated automatically from a script , but the result in the script is not ordered in a readable way, so i need your help to fix it using a shell command

the text file contain data in this way :

    0.147361 0.243688 0.081520 -0.446603 1.130529 NC_000846 Chordata
    Rheiformes
    Aves
     
    0.091740 0.379224 0.021160 -0.088493 3.441356 NC_000857 Arthropoda
    Diptera
    Insecta
     
    0.169093 0.265700 0.030083 -0.262037 1.211815 NC_000860 Chordata
    Salmoniformes
    Actinopterygii

i want to arrange the data in this text file in a way that each line will concatenate the 2 lines after it , so that will be 1 line , i want all the lines to be treated in this way ,

is there any way to do this ?



thanks in advance

[Cabhan]

This sounds a bit like a homework problem, but I'll give you a hint.

Do you know how to read in a line? Do you know how to output a line? These are both very easy with Bash scripting.

It seems to me that it would be very easy to read in three lines, and then output them concatenated together.

[weblover]

Hello,

first, thank you for you reply ,

i do know how to read a line , and how to output a line , i just learned this ,

but reading three line through all the txt file and then concatenate them , and how to count how much lines ?

i don't know how to do this , so please give me some code hints to start with

thanks in advance