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ajl_ahmed's avatar
ajl_ahmed
Iron Contributor
Dec 24, 2022

Filtering Data

Hi I need to use the FILTER function to filter the range (C6:Q55) of the attached file to get the student name who got degree less the 50 in any defined subject (D4:Q4). The defined subjects should ...
excel
office 365
  • Lorenzo's avatar
    Lorenzo
    Dec 24, 2022

    Hi ajl_ahmed

    Does this function update dynamically? I mean that if I change the degree from <50 to >50 the elements will be changed? => Why don't you try???

     

    A sligthly more concise one:

    =FILTER(C6:C55,
  MMULT(--(D6:Q55 < 50),SEQUENCE(COLUMNS(D4:Q5)))
)

     

PeterBartholomew1's avatar
PeterBartholomew1
Silver Contributor
Dec 24, 2022

ajl_ahmed 

This differs more in style than substance.  First, because I would never use a direct cell reference I name the data, headers and row-headers 'marks', 'subjects' and 'students' respectively.  The formula I used is given by

= LET(
    Sumλ,       LAMBDA(x, SUM(x)),
    fails,      SIGN(marks<threshold),
    countFails, BYROW(fails, Sumλ),
    FILTER(students, countFails)
 )

The first line defines the Lambda function 'Sumλ' for later use.  I could have used a defined name or simply used the anonymous Lambda function.  The next line works on the entire array of marks, returning 1 for any fail.  MMULT is a very fast and effective function but is somewhat mathematical so I chose to use the modern Lambda helper function BYROW to present the rows for summation one by one.  Finally, filter is used to remove the student names that have no failed subjects.

  • MY's avatar
    MY
    Brass Contributor
    Dec 24, 2022

    PeterBartholomew1 

    Great use of Lambda to solve the problem Peter - nice and easy to follow.

    I wish I could learn and propose answers using Lambda but my version of Excel is on semi-annual enterprise and the company does not have access to Lambda functions; plus my co-workers would not have a clue as to how to review my work!

    • PeterBartholomew1's avatar
      PeterBartholomew1
      Silver Contributor
      Dec 24, 2022

      MY 

      Your company may well need some more IT oriented staff to test the new functionality before it is released company-wide.  Your IT department / person could set one or two of you up with the insiders beta version.  I believe that to use the new functionality effectively requires 'retraining one's brain'.

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