Formulas used in Spreadsheets

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4answers
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Tool for teaching maths online [closed]

I'm trying to find a good tool for teaching someone maths online. Some kind of a online whiteboard that the student can be invited to. I need to be able to draw graphs and handwrite using my drawing ...
3
votes
3answers
2k views

How to apply a function to all the rows preceeding the current one in an arrayformula?

So I have the following situation: In the first column I have certain values, in the second column, given a certain row, I want it to contain the result of a function applied to all the preceeding ...
2
votes
2answers
85 views

How to interpolate data in a range in Google Sheets

I have an array with data: X Y 3 50 5 60 9 120 11 130 18 90 20 150 The data is entirely non-linear. X is guaranteed to be sorted. Now for any given ...
2
votes
1answer
7k views

Take SUM of colored cells in a column in Google Spreadsheets?

I have a column of numbers, where I've changed the background color of some of the cells to blue. All of the other cells in the column have the regular white background. Is it possible to create a ...
1
vote
1answer
2k views

Validation based on multiple sheets in Google Docs

I have 2 sheets that each contain a column of data that I would like combined and used as a validation list for a column in another sheet. What would the formula look like for this?