I have been struggling for a long time to write a script which would have 2 arguments, 1 asking to select a year and 2 asking to select if I want minimum, maximum, average or all to be shown as the last line from the files related to the year selected.
Basically, I have a directory which contains subdirectories of different years (2000, 2001, 2002 etc.) in those directories are subdirectories for months and days which contain (a) file(s) informing about populations (not real info though) of different cities as the last line. That's a part of the tree of the directory:
.
|-- 2000
| |-- 01
| | `-- 18
| | `-- ff_1177818640
| |-- 02
| | |-- 02
| | | `-- ff_1669027271
| | |-- 03
| | | `-- ff_234075290
| | |-- 10
| | | `-- ff_1584524530
| | |-- 14
| | | `-- ff_113807345
| | `-- 17
| | `-- ff_1452228827
| |-- 03
| | |-- 06
| | | `-- ff_58914249
| | `-- 11
| | `-- ff_2828212321
| |-- 04
| | `-- 17
| | `-- ff_302131884
| |-- 06
| | `-- 13
| | `-- ff_2175615745
| |-- 07
| | |-- 07
| | | `-- ff_918426998
| | `-- 24
| | `-- ff_2808316425
| |-- 08
| | `-- 27
| | `-- ff_1449825497
| |-- 09
| | `-- 19
| | `-- ff_110255856
| `-- 12
| `-- 08
| `-- ff_1621190
|-- 2001
| |-- 03
| | `-- 21
| | `-- ff_517010375
| |-- 05
| | `-- 27
| | `-- ff_1458621098
| |-- 06
| | |-- 07
| | | `-- ff_155853916
| | |-- 25
| | | |-- ff_2382312387
| | | `-- ff_270731174
| | `-- 29
| | `-- ff_3228522859
| |-- 07
| | `-- 28
| | `-- ff_3215021752
| |-- 09
| | `-- 24
| | `-- ff_1080314364
| `-- 11
| `-- 24
| `-- ff_2313722442
All files are formatted the same way:
2019-04-03
Wednesday
Newcastle-upon-Tyne
255362
I need to write a script to be asked which year I need (selecting that directory) and then asking if I want average, minimum, maximum or all of the above to be displayed for population (which is the last line of the files).
This is what I have so far:
#!/bin/bash
function min () {
echo $(sort -n populations | head -1)
}
function max () {
echo $(sort -n populations | tail -1)
}
function avg () {
count=0
sum=0
while read line ; do
num='echo ${line#* }'
sum='expr $sum + $num'
count='expr $count + 1'
done < populations
avg='expr $sum / $count'
echo $avg
}
echo "Please enter the year: "
read s1
echo "
Enter an option:
1. Minimum
2. Maximum
3. Average
4. All"
read s2
#echo $s2
for file in $(find ~/filesToSort/$s1 -type f) ; do
tail -1 $file >> populations
done
echo $(cat populations)
#min
#max
#avg
rm populations
This lets me pick directories, but does not give me the answers that I need, just spits the last lines of my files.
Best Answer
If I was implementing this in bash, I'd do the following. I won't comment on it much: feel free to ask specific questions though -- check the bash man page first if you don't know how a particular command works.