Formulas used in Spreadsheets

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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?
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4answers
2k views

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 ...
2
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2answers
361 views

Using formula (i.e. number calculation) in Gmail filter

I've been getting coupon offers from half a dozen of sites. Is it possible to use a formula like "If there is a number that is larger than 60, then remove". This means that all coupons which cost ...
10
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1answer
87k views

How is reddit's link karma calculated?

I couldn't find it easily in their FAQ: When does your link karma increase 1 point? I don't think it's a one-one relationship with votes, as some of my stuff got upvoted and it didn't change ...
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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 ...
2
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4answers
542 views

Webservice which allows chat with math formulas

The google charts API supports creating good looking formulas based upon latex input: Does someone know an online chat service which makes use of that API to display discussed formulas? Maybe with ...
28
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3answers
48k views

Google Spreadsheets ISEMPTY() formula function

Is there any way I can check whether a cell is empty? There is a function ISBLANK() but it returns false when there's a formula in a cell even thought the formula doesn't return anything (or an empty ...