## VideoPhoto

Showing posts with label template. Show all posts
Showing posts with label template. Show all posts

## 04 January, 2022

### Template for Basic Data Summary/Analysis

If you have collected and organized some data in table(s) or list(s), the first thing you might need could be to get quick general analysis/evaluation of that data - before going any further with some math, statistical or graphic analysis.

The following example provides easy solution, kind of a template, for that preliminary summary and basic analysis.

Here's just illustrative table of random data. Let's say you want to know "everything" about this set of values.

## 10 October, 2021

### Open Workbook with Startup Worksheet

If you create a workbook that will be opened and used frequently by yourself and - especially - if you design it for sharing with other users, you may want to start it in a compelling, attractive way.

I'm presenting here an example of initializing a worksheet which you might want to appear when the workbook is being started. The workbook is macro-driven, so it must be saved as Macro-Enabled Workbook. This is how the worksheet looks like after loading with a randomly selected photo (this is a screenshot of the left part of my computer screen):

## 08 September, 2021

### Goal Seek: Solving cubic equations

Let's say you you know the desired result of some formula, but you need to find possible input value(s) to achieve that result. You may even know the approximate values of those parameters. However, it's probably nothing more than guessing, and you need exact values.

In such cases it's better to use Excel's Goal Seek tool which helps to arrive at exact solutions very efficiently.

I'm providing here an example of using the Goal Seek. The example shows how to setup your worksheet for solving a cubic equation, such as Ac*x^3+Bc*x^2+Cc*x+Dc=0, where I renamed the coefficients a,b,c and d to Ac,Bc,Cc and Dc.

In this case we want to find the roots for this specific equation:

2*x^3-15*x^2-195*x+990=0

## 19 May, 2021

### Creating Surface Charts 3D

Surface charts in Excel deserve special attention. They allow to see your data in three dimensions and can be particularly useful in engineering applications (design and control of processes) as well as in the art of drawing and painting.

Typical surface chart shows how the dependent variable (z) behaves as a function of two independent variables (x & y). In other words, the chart illustrates outcome of any nonlinear function involving two variables. E.g. we can plot speed of some technological process (reaction) as a function of pressure and temperature.

In this post I'll show how you can prepare a template for creating surface charts based on equations including variety of math functions (algebraic, transcendental, periodic). Such template can be very useful in all kinds of design, as it allows you to visualize plenty of solutions in minutes.

Let's start with just one example of surface chart I've created. This is 3D plot of equation shown in the title of this chart:

How can you create similar charts based on your own equations?