A better way to compare text length percentage?


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting A better way to compare text length percentage?
# 8  
Old 04-23-2020
Quote:
Originally Posted by bedtime
...
Would really like to figure out how to get this to do the equation so as not to have the 'division by zero' error when one or two variables have an empty string. I've tried a bunch of things such as adding '1' to each variable and trying to make it up elsewhere, but each time the values are incorrect.
...
Thats why I prefer functions:
Code:
bigger_value()  { # str1 str2
	[[ ! 2 -eq $# ]] && echo "Usage: $FUNCNAME str1 str2" >&2 && return 1
	echo ${#1} ${#2} | awk '{a=b=$1;($1>$2)?a=$2:b=$2;if(a*b){print int(100/a*b)}}' >&1
	return $?
}

hth

EDIT:
But you still need to figure out a way to 'remove the option' to pass an empty string.
And without knowing how/where you get those strings, we can not help.

Last edited by sea; 04-23-2020 at 09:41 PM..
This User Gave Thanks to sea For This Post:
# 9  
Old 04-23-2020
How about:
Code:
echo ${#text1} ${#text2} | awk '$1*$2{a=b=$1;($1>$2)?a=$2:b=$2;print int(100/a*b)}'

These 2 Users Gave Thanks to vgersh99 For This Post:
# 10  
Old 04-24-2020
Quote:
Originally Posted by sea
Thats why I prefer functions:
Code:
bigger_value()  { # str1 str2
    [[ ! 2 -eq $# ]] && echo "Usage: $FUNCNAME str1 str2" >&2 && return 1
    echo ${#1} ${#2} | awk '{a=b=$1;($1>$2)?a=$2:b=$2;if(a*b){print int(100/a*b)}}' >&1
    return $?
 }

hth
I prefer to only use functions when I'm going to use them more than once in my code. In this case, it's only used once.


Quote:
EDIT:
But you still need to figure out a way to 'remove the option' to pass an empty string.
And without knowing how/where you get those strings, we can not help.
The strings are regular text. So long as the examples as we've used them work, the program will work. As to the empty string, the code to not run if one or more strings are 0 in length works well enough for me.

Last edited by bedtime; 04-24-2020 at 08:55 PM..
# 11  
Old 04-25-2020
For those who care, I managed to come up with something more efficient. This code will also output even if there is no text:
Code:
a=${#text1};b=${#text2};echo $((a*b?(a>b?100*a/b:100*b/a):0))


Last edited by bedtime; 04-26-2020 at 09:05 PM..
This User Gave Thanks to bedtime For This Post:
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Extracting fixed length number from a text file

Hi, I have a text file with sample records as CASE ID: 20170218881083 Original presentment record for ARN not found for Re-presentment I want to extract the 23 digit number from this file. I thought of using grep but initially couldn't extract the required number. However, after... (16 Replies)
Discussion started by: dsid
16 Replies

2. Shell Programming and Scripting

Compare string length to a number

Hi, I want to compare strings length to a number but i am getting error. I want first name should be length of 8. Please help. #bin !/bin/bash clear echo -n "Enter name " read name IFS=_ ary=($name) for key in "${!ary}"; do echo "$key${ary}"; done ##First name should be equal to 8... (8 Replies)
Discussion started by: rajneesh4U
8 Replies

3. Shell Programming and Scripting

awk to output the percentage of a field compared to length

The awk below using the sample input would output the following: Basically, it averages the text in $5 that matches if $7 < 30 . awk '{if(len==0){last=$5;total=$7;len=1;getline}if($5!=last){printf("%s\t%f\n", last,... (6 Replies)
Discussion started by: cmccabe
6 Replies

4. UNIX for Dummies Questions & Answers

print variable length text from the middle of a line?

I am trying to get text from a webpage, in terminal form. So far I am: 1. getting the html for the page printed using curl (curl -s webpage.com), which is then 2. piped to awk, printing line number 29 (awk NR==29), then 3. this is where I am sort of lost. I know where in the printed line I... (7 Replies)
Discussion started by: darkfalz
7 Replies

5. Shell Programming and Scripting

Aligning text files by max field length

Hello, Is there anyway that I can align a pipe delimited text file by the maxium field length where the field is separated out by pipes for large text files with more than 100,000 rows? So, far I have searched other forums and google about aligning text files in unix and I have noticed that... (7 Replies)
Discussion started by: physalis2099
7 Replies

6. Shell Programming and Scripting

changing a variable length text to a fixed length

Hi, Can anyone help with a effective solution ? I need to change a variable length text field (between 1 - 18 characters) to a fixed length text of 18 characters with the unused portion, at the end, filled with spaces. The text field is actually field 10 of a .csv file however I could cut... (7 Replies)
Discussion started by: dc18
7 Replies

7. UNIX for Dummies Questions & Answers

compare 2 very large lists of different length

I have two very large datasets (>100MB) in a simple vertical list format. They are of different size and with different order and formatting (e.g. whitespace and some other minor cruft that would thwart easy regex). Let's call them set1 and set2. I want to check set2 to see if it contains... (2 Replies)
Discussion started by: uiop44
2 Replies

8. Shell Programming and Scripting

Need awk script to compare 2 fields in fixed length file.

Need a script that manipulates a fixed length file that will compare 2 fields in that file and if they are equal write that line to a new file. i.e. If fields 87-93 = fields 119-125, then write the entire line to a new file. Do this for every line in the file. After we get only the fields... (1 Reply)
Discussion started by: Muga801
1 Replies

9. Shell Programming and Scripting

How to Compare two files depend on line length Chars

I need to compare two files with exactly same length as example: - File1 contain 500 records with length of 640 chars of each line. File2 contain 1500 records with length of 640 chars of each line. I need get an output to be written in File3 which will contain 1000 records difference. but... (4 Replies)
Discussion started by: elj3dah
4 Replies

10. Shell Programming and Scripting

how can i compare te length of the string

how can i campare te length of the string $var = unix if ( $var -eq 4 ) then.. is it right (6 Replies)
Discussion started by: mail2sant
6 Replies
Login or Register to Ask a Question