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 ...
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 ...
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 ...
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 ...
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 ...
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?