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To test for first THREE columns as specified, try
awk '{IX = $1 $2 $3} FNR == NR {T[IX] = $0; next} !(IX in T)' file2 file1

It looks like you are using bash - the array declaration is correct.
The the full syntax is:
declare -a myArray=( value1 value2 value3 )

for i in ${myArray }; do printf "%s\t" $i; done

Note...

With bash, try this:IFS=$'\t'; printf "%s\n" "${myArray
}"
fgh ijk xyz abcPlease note that you'll need to save IFS before and restore it later.

${x}_1

awk '$4!="A"{$4=$2$3;}$4=="A"{$4=$3$3;}1' OFS="\t" infile

I see a pattern here. If you were going to merge t1,t2,t3 afterwards anyway..


awk -F'\t' '{print $1,$2,$4,$5,$NF}' OFS="\t" input


edit: ok maybe this simplification won't work if the...

If these files are separated with single spaces or tabs, awk may take the multiple whitespaces to be one field. You can fix this by overriding the FS variable with a single tab.

I'd just do...

paste t1 t2 | awk -v OFS="\t" '{ (NF>M) && M=NF; for(N=1; N<=M; N++) length($N) || $N="NaN" } 1'

1 2 3 4 5 6 7 8
1 2 3 4 5 ...

sed -i "s/$a/$b/g" Master

a=2.165
b=3.234
c=`echo $a \* $b|bc`

Read more about bc if you want greater precision in the product

Substitution doesn't happen in single-quotes, no, even if you surround it by double quotes. You have to end the single quotes in an ugly mess like

$2>="'"$i"'" && $2 <="'"$j"'" This has an...

Hi.

Adapt as needed:
#!/usr/bin/env bash

# @(#) s1 Demonstrate successive slices of file.

FILE=${1-data1}

n=$( wc -l < $FILE )
echo " Info: processing $n lines of $FILE"
for ((...

Just set OFS...awk '...' OFS='\t' file1

With the given example...$ cat file1
100 A 105 B
200 B 205 C
300 C 305 D
400 D 405 E
500 E 505 F

$ awk 'BEGIN{n=split("A B C D E",s);split("1 2 3 4...

You can use variables like this:
awk -v var1="TP" -v var2="10" -v var3="100" '
$2==var1 && $3 >= var2 && $3 <= var3' inputFile > PatternFile

Use TAB space instead of single space
old=${line%%<TAB>*}
new=${line##*<TAB>}

This is much better done in a 'while' than 'for' loop.

The read builtin by default breaks on all whitespace, tabs included. To break on only tabs, set the IFS variable to a tab.
while read A B...

csplit is for you. Read your documentation. /^2/ is the regular expression you need. See what you can come up with. We will help when you come back with questions.