J. Doe's questions

I'm trying to assign multiple variables to load into a pipeline. I want to prompt the user for values and then read them into variables. My current script is:

echo "How many galaxies are you analyzing?"
read n1

i=1
while [$i -lt $n1]; do
echo "Please list galaxy $i."
read gal${i}
echo "How many observations are there for gal${i}?"
read n2
while [$j -lt  $n2]
echo "Please enter observation #$j for gal${i}."
read obs${j}
echo gal${i}
echo obs${j}
let j++
done
echo gal${i}
let i+1
done

I would like for there to be a tree consisting of

├── gal1
|   ├── obs1
│   └── obs2
├── gal2
│   ├── obs1
│   ├── obs2
│   └──obs3

where these values are any alphanumeric combination.

The error I'm getting when I run the loop above is:

user@user:~$ bash tst.tst 
How many galaxies are you analyzing?
2
tst.ts: line 16: syntax error near unexpected token `done'
tst.ts: line 16: `done'

The current script is

for r in $path/[0-9]*.tst; do

sed -i s/val1/${r%.tst}/ $path/foo.bar
sed -i s/val2/${var2}/ $path/foo.bar
sed -i s/val3/${var3}/ $path/foo.bar
sed -i s/val4/${var4}/ $path/foo.bar

cat $path/foo.bar
done

Values 2-4 work fine; however, val1 remains unchanged. This is true even when I use ${r} instead of ${r%.tst}.

Are there any glaring errors in this snippet?

I would like to write a while loop in Bash that runs over all instances of files that are of the form of

{number}.tst

for example, 1.tst, 2.tst, ... 50.tst.

I do not want it to run over the file tst.tst.

How would I go about writing this? I assume I will need a boolean phrase and [0-9]* somewhere in there, but I am not entirely sure on the syntax.

I have variables in a bash script that I need to be carried over into a perl one. I have the variables $gal and $obsid declared in the bash script, and then I call the new program.

gal=UCLA121
obsid=1896
./my_program

The beginning of the perl script loads an image with the phrase

$ph_im =  "./$gal/img/${obsid}.img";

But the variables are NULL in the new program.

I have a variable that is stored as "1.20E20". I would like for it to be changed to "0.0120E22". Is there a simple command to change this value? I tried

let nh=$nh/100

But that did not work; I assume it is because of the character value in the variable. I know there are various solutions; what is the best way to solve this?

My file structure is like this.

unix% ls
NGC2201 IC0499 IC7216 NGC7169
unix% cd NGC2201
unix% ls
7019 2221 note

where 7019 and 2221 are new directories and note is a text file that I use to create variables. The contents within 2221 and 7019 are important, but do not need to be set as variables; my scripts afterwords will take care of all of that.

My current script is the following:

# The purpose of this script is to take the note files provided and set the values as variables.

#!/bin/csh -f

set z=`grep -E '^z=' note | cut -d= -f2`
set nh=`grep 'NH' note | cut -d= -f2`
set xc=`grep 'Center' note | cut -d, -f1 | cut '-d' -f4`


echo $z $nh $xc

This sets three variables for use in the current directory (in this case, we will use NGC2201 as the parent directory and 7019 and 2221 as the sub-directories for these variables to be used on).

My question is how do I write a script to automatically set NGC2201 as a variable named $g and 2221 as a variable named $obs.

After the script runs through 2221, I would like it to then set the directory as 7019 and repeat the steps. After the directories within NGC2201 are finished, I would like the script to move on to IC0499, repeat the process, etc.

How do I get the script to run through the directories? I cannot make it global because it cannot be too intrusive; I need it to only go two directories deep to be satisfactory.

I would like to keep it within csh if possible, but if this is easier in tcsh or bash, I am all for it. Additionally, if there is an easier solution than looping it like this, I am all for that too.

unix%:~/tmp$ cat tmp.txt 
z=0.016728
NH=5.7E20
Center for spectra: 2:00:14.906, +31:25:45.826

I would like for the value of z to be set to a variable named $redsh, the value of NH to be $abun, and the values for the center to be $xc and $yc respectively.

How do I go about doing this?

I am currently using grep to locate a string in a file. However, I get a result I do not want.

Example output:

user@user:~/tmp$ grep "z=" note > tmp.txt | cat tmp.txt 
z=0.016728
 S_1.4 GHz=   1597.61548     mJy, for L_1.4=1E24 W Hz^-1 (index=0.8)

I do not want to use grep to ignore all results after z=0.016728 because I cannot guarantee that the file structure I am using will always have z= before GHz=.

I would like to ignore anything without a newline or with a character value before z=.

I am aware this may be a duplicate, and if so, I will delete it.

What is the easiest way to navigate to a deep directory without having to type the directory every time. I do a lot of stuff in the same folders but every time I open a new terminal, I have to navigate to the directory again.

So far, I have been using variables in .bashrc, but is there an easier way than

cd $data

to get somewhere? For example, if I want to just be able to type "data" and be navigated to one of my data folders, how do I go about that?