Excel formula to determine missing numbers
In column S of Sheet 1 I have a list of case numbers. They all start with the year that the incident occurred &, followed by the incident number. On Sheet 2, I want to be able to quickly determine if any numbers in the sequence have been skipped. For instance, 2024-033, 2025-001, 2025-003, etc. There are never a set number of cases per year, so it wouldn't matter whether there should've been a 2024-034 after #33, but I would need to be able to readily see that 2025-002 was never input. If it matters, each year begins with '001' and not '000' and I'm working with Excel 2016.How to filter visible cells by formula after applying filter to a dataset.
I have a dataset from A1:B11 (in real case many more). I apply a filter on dataset, for example filter data for Retailer1 and Retailer3. I want on a separate sheet to filter these visible cells using formula (not VBA). Preferably using a generic LAMBDA function like =FILTERVISIBLE(A2:B11). Any thought or idea to achieve it?
Range showing (table array) in the wrong place
I’ve got a VLOOKUP pulling data from another excel file (sources.xlsx) the formula works as intended it's pulling the right department names based on id number, but here’s the weird part, when I double click the formula to check it, the table array ($A$2:$B$23) gets highlighted in the current sheet instead of the actual source sheet (which is in the other file). The data is still coming in correctly, just excel is showing the range in the wrong place. Is this normal when referencing another workbook? I never experience this before, and I am not sure if it new thing or a bug Example
Data Validation Conditional Formating
I have a shared spreadsheet where coordinators enter staff codes for particular tasks they would like them to do (it's not a timesheet, just a future planning tool). I have set up a data validation to warn them if they enter a staff code that is not in the list, however if someone leaves after their code has been entered, the validation doesn't re-check so the now-invalid code remains happily in the spreadsheet. I need the cells to highlight if the staff code is not in the list. Does anyone know if this is possible? Currently, I need to search for each code as someone leaves and manually remove them from the spreadsheet and then ask coordinators to re-enter new values. It would be great if it would just flag them in red when I remove them from the staffing list and coordinators can see if there is (now) an error that needs fixing. Not sure how to attach a file as it's not 'link'able with a URL, so here's screen shots:
Calculate Average Up Periods and Down Periods
Good afternoon, all. I am doing an analysis on data going back to 1984 (monthly data). The data set has positive and negative numbers. I am trying to create a formula that will go through all the data points and calculate the average of all the positive data points. Also, want the same calculation for all the negative data points. How should I set that up? What is the best function to use? Thank you in advance. Regards,Complex Cell Format, Maybe!!!
Hi, I'm in the eyecare profession and we make use of vision measurement (visual acuity) standards, and these are supposed to be indivisible fractions, but here are what I's faced with: Unless I format the cell to text, excel will either divide the fraction or convert it to date via the date picker I'm using what other means can I use? I'd like to use this fraction like 6/18 or 20/60 to count in the count function, would this be possible? This is just the start, I want to solve this first and then see how it goes. Thanks for your guidance. Cheers.Rack of Lambda
There’s been a lot of content shared recently to commemorate the upcoming 40th anniversary of Microsoft Excel. Personally, I’ve only been using Excel for around half that time, but October also marks my 2-year anniversary since "joining the conversation" on this forum. As a gift from me to you (anyone interested), I’ve spent some time over the past few weeks revisiting old posts, updating methods I shared previously and packaging them into a collection of generalized Lambda functions to assist with a variety of common array manipulation and transformation scenarios. The attached file contains some 35+ Lambda functions, ranging from very simple concepts to much more advanced techniques. You can also import them directly from my gist, if desired. While they were all compiled and composed of my own accord, I would be remiss if I failed to credit the community and its members as a major resource in my own development. The amount of knowledge, tips and tricks gained through community collaboration is simply invaluable. You may notice some recurring themes in the way I’ve written many of the functions. For example, I like to keep the optional arguments as simple as possible, using either Boolean values passed to IF, or numeric options from 0 to 3 passed to CHOOSE. Also, many of the array transformation functions use TOCOL-IF-SEQUENCE in one way or another, with MOD-QUOTIENT-SEQUENCE used only a few times in the more complex algorithms (e.g. HWRAP and VWRAP). The collection also includes a few examples of Lambda recursion, the most notable being PF (Prime Factorization). CROSSJOINM was written as a "how-to" demonstration for filtering multiple optional arguments using LAMBDA and NOT-ISOMITTED. There’re also some powerful scanning functions like SCAN3, which can handle multiple input arrays, as well as EVALS with VALS2 to VALS7, which can store and recall multiple variables at each iteration (useful for corkscrew calculations). What you won’t find, however, are methods that use INDEX in an iterative manner with functions like MAKEARRAY, SCAN, etc. as these are only efficient when iterating over a range reference (they will bog down considerably and become practically unusable after just a few thousand iterations when looping over an array object). As such, I don’t recommend them as "generalized" solutions, although they can be very effective on a case-by-case basis. Similarly, you will only find 2 examples in this collection that use REDUCE-STACK in a limited capacity, with fewer than 10 iterations, as I also consider this to be a method of last resort due to its problems with efficiency when the number of iterations cannot be controlled. Hopefully one or two of them proves useful. If not, no big deal. Many of the examples in the attached file are interactive, so you can see how the different options affect the output. For those brave enough, please feel free to share your own custom functions too. I’d love to see what you got. Cheers!
