Index   Chr Start   End Ref Alt Freq    Qual    Score   Input   ---- this file is verified with 10 headers and the data type in each field is good
1    1    1    100    C    -    1    GOOD    10    .
2    2    20    200    A    C    .002    STRAND BIAS    2    .
3    2    270    400    -    GG    .036    GOOD    6    .

Index   Chr Start   End Ref Alt Freq    Qual    Score    Input --- this file is verified with 10 headers but not verified as the red . in QUAL should be "GOOD" or alpha
1    1    1    100    C    -    1    .   10    .
2    2    20    200    A    C    .002    STRAND BIAS    2    .
3    2    270    400    -    GG    .036    GOOD    6    .

Index    Chr    Start    End    Ref    Alt    Freq    Qual    Score    Input    ---- defined 10 column headers ----
Integar     Integar    Integar    Integar    Alpha    Alpha    Integar    Alpha    Integar    Integar   --- data type of each line after header  ----

#!/bin/bash

dir="/home/cmccabe/bash"   # directory to search for files
for f in "$dir"/*.txt; do   # start for loop
bname=`basename $f`    # strip off path
pref=${bname%%.txt}    # strip of path and extention from output
awk '
FNR==NR {  # process all columns and rows in file
    for(n=1;n<=NF;n++)   # iterate through  each
        a[$n]  # store inarray n
    nextfile   # next file
}
NF==(n-1) {  # define NF
    print FILENAME " file has expected number of fields"   # Good file
    nextfile   # next file
}
{
    for(i=1;i<=NF;i++)  # iterate through headers
        b[$i]   # header lines
    print FILENAME " is missing header for: "   # Bad file
    for(i in a)   # read headers into i
    if(i in b==0)  # if can not find header in key
        print i    # print missing header
    nextfile  
}' /home/cmccabe/bash/key $f > /home/cmccabe/bash/${pref}_out # use key as headers to look for in files and create out for each
done

isnumeric()   # numeric function
{   # start block
    result=$(echo "$1" | tr -d '[[:digit:]]')  # check each field in file for numeric and store result
    echo ${#result}   # display result
}  # end block

isalpha()   # charcter function
{  # start block
    result=$(echo "$1" | tr -d '[[:alpha:]]')  # check each field in file for character and store result
    echo ${#result}   # display result
}  # end block
col1=""   # define col to search
col2=""   # define col to search
col3=""   # define col to search
col4=""   # define col to search
col5=""   # define col to search
col6=""   # define col to search
col7=""   # define col to search
col8=""   # define col to search
col9=""    # define col to search
col10=""  # define col to search
let retval=1  # data to check in this row

while read record  # start loop to read each column in file
do
    echo "$record" | awk -F'\t' '{print $1, $2, $3, $4, $5, $6, $7, $8, $9, $10 }' | read col1 col2 col3 col4 col5 col6 col7 col8 col col10  # store in col name in record
    
    # check  if numeric in col
    if [[ $(isnumeric "$col1") -eq 1 && $(isnumeric "$col2") -eq 1 && $(isnumeric "$col3") -eq 1 && $(isnumeric "$col4") -eq 1 && $(isnumeric "$col7") -eq 1 && $(isnumeric "$col9") -eq 1 && $(isnumeric "$col10") -eq 1 ]]; then
         retval=1  # check data in this row
    else
         retval=0  # go back to header row
         break
    fi  # close if.... else
    
    # check if alpha in col
    if [[ $(isalpha "$col5") -eq 1 && $(isalpha "$col6") -eq 1 && $(isalpha "$col8") -eq 1 ]]; then
         retval=1  # check data in this row
    else
         retval=0  # go back to header row
         break
    fi  # close if....else
    
    if [[ $retval -eq 1 ]]; then   # display results
      echo "file is correct data type in each field"   # file isvalidated
    else
      echo "file is  not the correct data type for:"  # colums ...in file not-validated
      echo "$col1 $col2 $col3 $col4 $col5 $col6 $col7 $col8 $col9 $col10"
    fi  # close if.... else    
    
    if [[ NF == 10 && $retval -eq 1 ]]; then   # execute and display file validated
      echo "$f is validated"
    else
      echo "$f is not validated"
    fi
done  < $f >> /home/cmccabe/bash/${pref}_out  # end loop and define file to check and add to output

/home/cmccabe/bash/file1.txt file has expected number of fields
/home/cmccabe/bash/file1.txt is validated
/home/cmccabe/bash/file1.txt is correct data type in each field

/home/cmccabe/bash/file2.txt has the expected number of fields
/home/cmccabe/bash/file2.txt is not the correct data type for: QUAL
/home/cmccabe/bash/file2.txt is not validated