Google Sheets: aggregate and extrapolate irregular data over time

  1. I have a list in which I now-and-then (no fixed interval) enter the available budget.

  2. Most of all I want to extrapolate this to a future trend of the coming 10 years. (no rocket science, more of an average through line of the last 4-5 samples, as you would have in stock market charts or so)

Possible as an inbetween step I would like to aggregate this to one average number per quarter. As in most quarters there is no data available, it should mean interpolation. (or interpolation for all: so regarding Jan/April/Juli/Oct 1st. it’s always interpolated between the neirest neighbours, fine with me…)

I am familiar with regular spreadsheet aggregate function, but I have no idea, what to use on such irregulary entered data. I have seen some stuff on extrapolition, but most was an sequences, (not a „sampled function“ if you will).

Sample Sheet

enter image description here

Thank you for your help 🙂

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Author: Frank Nocke

Progress bar with Bar Chart in Google Sheets

I have a 2 tasks that I would like to keep track of my progress in google sheets with a percentage bar chart.

Google charts is not allowing me to separate the data into two series. They have the same color. I’d like to color them differently. How can I accomplish that? Further, I’d like for 100% to show up for the last tick mark. I added 1 for the max value, but that only increased the scale and did not place a tick mark.

How do I color the series differently (both data points are called ‘Bar 1’)?

How do I add ‘100%’ as a tick mark?

The data range is S1:U2. There is nothing in the S column.

Here’s a snapshot of my chart and the data in google sheets.
enter image description here

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Author: K. Shores