Shell Programming and Scripting

Hmm quite difficult for me to express my problem in one sentence.Introduction [which is recomended to be skipped] {i am a newbee to csh perl, awk and stuff, and by surfing these forums i managed to build quite a big code using all three of them in a script. Have to admitt, it was not a good idea, and its the perfect example of how not to program, but i have to little time to learn a complete script language like perl. And i needed some stuff, which i wasnt sure if perl could do it, or at least i didnt find how } #end of time wasitng intro in a csh script i have the following two lines:set t1g = `perl -e "printf '%07g', $t1-$dt1"`perl -pi -e "s/%%var1%/$t1g/" main_opt.kfirst one is meant to calculate a value of a csh variable which consists of floating points numbers read from a specific line and column text file elswhere in the code. i call perl since it can do the floating point opperations.second line is meant to substitute the value of %%var1% in a text file with the number calculated in the first line. like:R T2 %%var1% R T3 %%var2% R T4 3.260000R R T6 3.660000R T7 3.860000R T8 4.060000R Now the problem, i would like perl to preplace it with a floating point number of formatted length 7 in my case. now the number has different lengths some times its 0.125 and some times its 0.3333333 or 923.24 how can i get it to a fixed length? (0.12500 0.33333 923.24) such that the other values in the text file dont move.Hope some one can help. Thank you verry much.Radamez

Hmm quite difficult for me to express my problem in one sentence.
Introduction [which is recomended to be skipped]
{i am a newbee to csh perl, awk and stuff, and by surfing these forums i managed to build quite a big code using all three of them in a script.
Have to admitt, it was not a good idea, and its the perfect example of how not to program, but i have to little time to learn a complete script language like perl. And i needed some stuff, which i wasnt sure if perl could do it, or at least i didnt find how
} #end of time wasitng intro

in a csh script i have the following two lines:


set t1g = `perl -e "printf '%07g', $t1-$dt1"`
perl -pi -e "s/%%var1%/$t1g/" main_opt.k


first one is meant to calculate a value of a csh variable which consists of floating points numbers read from a specific line and column text file elswhere in the code. i call perl since it can do the floating point opperations.

second line is meant to substitute the value of %%var1% in a text file with the number calculated in the first line.
like:

R T2 %%var1% R T3 %%var2% R T4 3.260000R
R T6 3.660000R T7 3.860000R T8 4.060000R

Now the problem, i would like perl to preplace it with a floating point number of formatted length 7 in my case. now the number has different lengths some times its 0.125 and some times its 0.3333333 or 923.24 how can i get it to a fixed length? (0.12500 0.33333 923.24) such that the other values in the text file dont move.

Hope some one can help. Thank you verry much.

Radamez

Why didn't you edit your original post instead of making a new one?

Then why post it?

csh is not recommended for scripting.

You can do almost everything in a POSIX shell, with a twist of awk.

Please put code inside [code] tags.

awk is simpler than perl.

In any language which has printf (awk, POSIX shell, etc.) use a format string: "%.5f".

Dear Mr. cfajohnson

Your post was not verry helpfull to me. Nevertheless I Thank you for your precious time.

Maybe some one else could Answer my question in a way that i understand.

Many Thanks in Advance