如何在数组bash脚本中附加每个变量

Question

i want to append the variables values inside each condition into array as per the sequence ie here first 60s then 59.8S at last 30.8NI want to add the elements By my code only the last 4 elements are getting appended in array.

#!/bin/bash
for i in $(seq -60 1 30);do
nextint=$((i+1))
sum=$((i+nextint))
mid=`echo "$sum / 2" | bc -l`

sum=`echo $i + $mid | bc`
topmid=`echo "$sum / 2" | bc -l`

sum=`echo $mid + $nextint | bc`
bottommid=`echo "$sum / 2" | bc -l`
k=0.0
#printf "$i%.*f\n$topmid%.*f\n$mid%.*f\n$bottommid%.*f\n"
# "$topmid $mid $bottommid"

#printf "%.*f\n" $i $topmid $mid $botttommid
   n='N'
   s='S'
   array=()
if (( $(echo "$i == $k" | bc -l) )); then
       i=$( printf "%.f\n" "$i")
      topmid=$(printf "%.1f\n" "$topmid")
      mid=$(printf "%.1f\n" "$mid")
     bottommid=$( printf "%.1f\n" "$bottommid")

           topmid=$topmid$n
           mid=$mid$n
           bottommid=$bottommid$n
           echo "$i"
           echo "$topmid"
           echo "$mid"
           echo "$bottommid"

         array+=("$i")
         array+=("$topmid")
         array+=("$mid")
         array+=("$bottommid")
# echo "${array[@]}"
#fi
#done
elif (( $( echo "$i > $k" |bc -l ) ))
        #n='N'
then
      i=$( printf "%.f\n" "$i")
      topmid=$(printf "%.1f\n" "$topmid")
      mid=$(printf "%.1f\n" "$mid")
     bottommid=$( printf "%.1f\n" "$bottommid")
           i=$i$n
           topmid=$topmid$n
           mid=$mid$n
           bottommid=$bottommid$n
           echo "$i"
     #      eco "${array[@]}"
           echo "$topmid"
           echo "$mid"
           echo "$bottommid"
          array+=("$i")  
         array+=("$topmid")
         array+=("$mid")
         array+=("$bottommid")
else
        #s='S'
<<com
      printf "%.f\n" "$i"
      printf "%.1f\n" "$topmid"
      printf "%.1f\n" "$mid"
      printf "%.1f\n" "$bottommid"
com
      i=$( printf "%.f\n" "$i")
      topmid=$(printf "%.1f\n" "$topmid")
      mid=$(printf "%.1f\n" "$mid")
      bottommid=$( printf "%.1f\n" "$bottommid")
           i=$(echo $i$s| sed 's/-//g')
           topmid=$(echo $topmid$s | sed 's/-//g')
           mid=$(echo $mid$s | sed 's/-//g')
           bottommid=$(echo $bottommid$s | sed 's/-//g')
           echo "$i"
           echo "$topmid"
           echo "$mid"
           echo "$bottommid"
          array+=(" $i")
         array+=(" $topmid")
         array+=(" $mid")
         array+=("$bottommid")


fi
done
echo "${array[*]}"
echo "${#array[@]}"

output is --- 60S 59.8S 59.5S 59.2S 59S 58.8S 58.5S 58.2S 58S ..... 28.8N 29N 29.2N 29.5N 29.8N 30N 30.2N 30.5N 30.8N 30N 30.2N 30.5N 30.8N 4

I want array to whole variables values as elements in sequence 60N 59.8N ....... 30N 30.2N 30.5N 30.8N

TIA.** I want array to whole variables values as elements in sequence 60N 59.8N ....... 30N 30.2N 30.5N 30.8N **

Answer 1

Move array=() outside of the loop:

#!/bin/bash
array=()
for i in $(seq -60 1 30);do
nextint=$((i+1))
sum=$((i+nextint))
mid=`echo "$sum / 2" | bc -l`

sum=`echo $i + $mid | bc`
topmid=`echo "$sum / 2" | bc -l`

sum=`echo $mid + $nextint | bc`
bottommid=`echo "$sum / 2" | bc -l`
k=0.0
#printf "$i%.*f\n$topmid%.*f\n$mid%.*f\n$bottommid%.*f\n"
# "$topmid $mid $bottommid"

#printf "%.*f\n" $i $topmid $mid $botttommid
   n='N'
   s='S'

if (( $(echo "$i == $k" | bc -l) )); then
       i=$( printf "%.f\n" "$i")
      topmid=$(printf "%.1f\n" "$topmid")
      mid=$(printf "%.1f\n" "$mid")
     bottommid=$( printf "%.1f\n" "$bottommid")

           topmid=$topmid$n
           mid=$mid$n
           bottommid=$bottommid$n
           echo "$i"
           echo "$topmid"
           echo "$mid"
           echo "$bottommid"

         array+=("$i")
         array+=("$topmid")
         array+=("$mid")
         array+=("$bottommid")
# echo "${array[@]}"
#fi
#done
elif (( $( echo "$i > $k" |bc -l ) ))
        #n='N'
then
      i=$( printf "%.f\n" "$i")
      topmid=$(printf "%.1f\n" "$topmid")
      mid=$(printf "%.1f\n" "$mid")
     bottommid=$( printf "%.1f\n" "$bottommid")
           i=$i$n
           topmid=$topmid$n
           mid=$mid$n
           bottommid=$bottommid$n
           echo "$i"
     #      eco "${array[@]}"
           echo "$topmid"
           echo "$mid"
           echo "$bottommid"
          array+=("$i")  
         array+=("$topmid")
         array+=("$mid")
         array+=("$bottommid")
else
        #s='S'
<<com
      printf "%.f\n" "$i"
      printf "%.1f\n" "$topmid"
      printf "%.1f\n" "$mid"
      printf "%.1f\n" "$bottommid"
com
      i=$( printf "%.f\n" "$i")
      topmid=$(printf "%.1f\n" "$topmid")
      mid=$(printf "%.1f\n" "$mid")
      bottommid=$( printf "%.1f\n" "$bottommid")
           i=$(echo $i$s| sed 's/-//g')
           topmid=$(echo $topmid$s | sed 's/-//g')
           mid=$(echo $mid$s | sed 's/-//g')
           bottommid=$(echo $bottommid$s | sed 's/-//g')
           echo "$i"
           echo "$topmid"
           echo "$mid"
           echo "$bottommid"
          array+=(" $i")
         array+=(" $topmid")
         array+=(" $mid")
         array+=("$bottommid")


fi
done
echo "${array[*]}"
echo "${#array[@]}"

Effectively, you're emptying it on every bit of the loop, and you set a maximum of 4 values. set -x is great for diagnosing these types of issues.

Use https://www.shellcheck.net/ to check your code. Best practice and all that.