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# Category Archives: Charts

## Displaying trend line equations on line charts

This post is prompted by a recent comment at Using LINEST for non-linear curve fitting which found that the trend line formula displayed on a chart was totally different from that found using the Linest function. The problem was caused by using a … Continue reading

Posted in Charts, Charts, Excel, Maths
Tagged Chart, Excel, Show trend line equation, Trend line
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## Editing Charts with the mouse

When editing chart ranges, to either change the limits of the range, or select a new column, I have been in the habit of either selecting a range and editing the text in the Formula Edit Bar, or right clicking, … Continue reading

## A mystery curve links to Jupyter

Reviewing some of my less visited links recently, I was intrigued by a post at The Math Less Travelled: The previous post at the site provides more details of the source of the curve, and some links to an interactive … Continue reading

Posted in Charts, Charts, Excel, Maths, Newton
Tagged curve generator, Excel, Jupyter, Maths, parametric curve, Python, Scatter chart
2 Comments

## Baby Names and Pivot Tables

Baby Boom: An Excel Tutorial on Analyzing Large Data Sets is a comprehensive (and free) tutorial looking at analysing public databases of baby names, using Excel: There are professional data analysts out there who tackle “big data” with complex software, … Continue reading

Posted in Charts, Excel
Tagged Analysing data, Excel, large data sets, Pivot charts, pivot tables, tutorial
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## EvalA update and examples

The EvalA User Defined Function (UDF) has been included in the Eval2 and Eval-Integration spreadsheets for some time, but was not documented. That has now been fixed, and both spreadsheets can be downloaded from Eval2.Zip (including full open-source code). The … Continue reading

Posted in Arrays, Charts, Excel, Maths, Newton, UDFs, VBA
Tagged EvalA function, evaluation of text strings, Excel, UDF, VBA
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## Daily Download 22: Splines and Curves

Since it was first published in 2009 my CSpline function has been the most popular download from this site. CSpline (and various associated functions) is used to fit a series of cubic curves through specified points, allowing interpolation along a smooth … Continue reading

Posted in AlgLib, Beam Bending, Charts, Charts, Coordinate Geometry, Excel, Newton, Numerical integration, UDFs, VBA
Tagged Cardinal spline, catenary curve, Cubic spline, curve fitting, Excel, Hermite Spline, Interpolation, UDF, VBA
6 Comments

## Daily Download 20: Section Properties

The download spreadsheets today provide functions to find section properties of shapes either defined by coordinates or selected from a list of shape types. The section properties found are: area, first and second moments of area about the X and Y … Continue reading

Posted in Charts, Coordinate Geometry, Drawing, Excel, Maths, Newton, UDFs, VBA
Tagged Excel, Section Properties; Area; First Moment of Area; Second Moment of Area, UDF, VBA, vectors
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