Category Archives: Coordinate Geometry

Alternative IP and Rotations

Posted on 11/04/2011 by dougaj4

In response to the 3D Intersections and PView Function posts Lori Miller has sent me two very elegant alternative ways of achieving similar results. The first is an on-spreadsheet solution to the intersection of two lines, using the LinEst function: Note … Continue reading →

Posted in Arrays, Charts, Charts, Coordinate Geometry, Excel | Tagged , , , | Leave a comment

PView Function

Posted on 31/03/2011 by dougaj4

As promised in the previous post, here are further details of the PView User Defined Function (UDF), included in the IP2 spreadsheet, which can be downloaded (including full open source code) from IP2.ZIP. The PView UDF works by multiplying the 3D … Continue reading →

Posted in Arrays, Charts, Charts, Coordinate Geometry, Drawing, Excel, Maths, UDFs, VBA | Tagged , , , , , , | 3 Comments

More 3D Intersections and 3D plotting function

Posted on 28/03/2011 by dougaj4

Following the previous post, I have added several new functions connected with intersections of lines and planes, and a function to generate a perspective plot from 3D coordinates.  The new functions have been added to the IP2.xls worksheet, which can … Continue reading →

Posted in Coordinate Geometry, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , , | 7 Comments

3D Intersections

Posted on 19/03/2011 by dougaj4

Following a discussion at the Eng-Tips Forum, I have written an Excel User Defined Function (UDF) to find the intersection point of two 3D line segments.  The UDF has been added to the IP2 spreadsheet, which is available for free … Continue reading →

Posted in Coordinate Geometry, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , | 7 Comments

Maximum distance between two points

Posted on 27/11/2010 by dougaj4

I have just written a short User Defined Function (UDF) to find the maximum distance between any two points from a list of coordinates, and since it may be useful to others, I will post it here.  Here is the … Continue reading →

Posted in Coordinate Geometry, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , | 1 Comment