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Top Forums UNIX for Beginners Questions & Answers Calculate average from a given set of keys and values Post 303037867 by nans on Thursday 15th of August 2019 09:47:48 AM
Old 08-15-2019
Calculate average from a given set of keys and values

Hello,
I am writing a script which expects as its input a hash with student names as the keys and marks as the values. The script then returns array of average marks for student scored 60-70, 70-80, and over 90.


Output expected


Code:
50-70    1
70-90    3
over 90   0

The test script so far I have written looks like this


Code:
#!/bin/bash

ARRAY=( "ABC:60"
        "DEF:70"
        "GHI:75"
        "JKL:80" )

for student in "${ARRAY[@]}" ; do
    KEY="${student%%:*}"
    VALUE="${student##*:}"
    printf "%s's marks is %s.\n" "$KEY" "$VALUE"


done

I am able to store the input as hash with keys and its values but not able to calculate the average and give the output as expected. Any suggestions would be appreciated.


thank you

Last edited by nans; 08-15-2019 at 11:12 AM..
 

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TWIGLET(1)							   User's Manual							TWIGLET(1)

NAME
twiglet - observe or control an RVC-enabled machine's console SYNOPSIS
twiglet [OPTION]... host-specification DESCRIPTION
twiglet is a program for controlling another machine's console. It works using the RVC protocol, and an RVC server (such as rvcd(1)) must be running on the machine to be observed. Using twiglet, the a best effort attempt is made to duplicate the screen contents of the observed machine. If the machine is displaying a virtual text console, the text on the console is rendered in the terminal in which twiglet runs. If the machine is displaying an X ses- sion, and the RVC server supports VNC integration, twiglet will open a window that contains the current contents of the X display. It is also possible to control the observed machine in various ways. With keyboard control enabled (and with support from the RVC server), keys may be sent to the observed machine in text console mode almost as if they were typed from the keyboard. Twiglet also supports switching virtual console on the observed machine. Finally, if VNC integration is available, the X display can be manipulated almost as if the user were at the console. The intended use for twiglet is in training and teaching environments. The idea is that there are student machines and a control machine (which the trainer or teacher would be using), with a serial line attached to each student machine. The trainer or teacher can then ana- lyse the students' attempts to complete tasks, and help them out (showing them how to finish it) without needed to push them aside to get to the keyboard. This client is written using ncurses(3X). OPTIONS
--help display a help message and exit successfully --version display a version number and exit successfully -c, --control control the remote machine rather than just observing it -e xy, --escape xy set the escape character and the escape escape character (like screen(1)) The host-specification takes one of the following forms: host:port to connect to an RVC server over TCP tty [host] to communicate with an RVC server over a tty (for example a serial line); the optional hostname is for VNC integration BUGS
I'm sure there are bugs, but I don't know what they are. AUTHOR
Tim Waugh <twaugh@redhat.com> VTGRAB
20 Sep 2000 TWIGLET(1)
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