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Author: Created: 9/30/2008 8:59 PM RssIcon
Commentary from the WestClinTech function designers.
By Charles Flock on 7/7/2010 5:12 PM
How do you know if a function is accurate?
By Charles Flock on 6/27/2010 2:37 PM

We are pleased to announce the availability of XLeratorDB/developer at the startling price of $149.99

By Charles Flock on 6/8/2010 5:04 PM
Using the SeriesInt function to create a Monte Carlo simulation analyzing a classic probability problem.
By Charles Flock on 5/18/2010 8:19 PM
When is it time to admit that your favorite baseball team is not going to play in the post-season?
By Charles Flock on 5/10/2010 5:59 PM
EXCEL 2010 [beta] documentation uses the phrase ‘the following functions have improved accuracy.’  But what does that actually mean in relation to the IPMT, PPMT, CUMPRINC, and CUMIPMT functions?
By Charles Flock on 5/2/2010 4:12 PM
XLeratorDB/statistics version 1.05 contains eight new chi-squared functions that give you the flexibility to enter the expected results.
By Charles Flock on 4/26/2010 5:22 PM
XIRR in EXCEL 2010 is greatly improved over 2007, but you won’t find it mentioned in the literature.
By Charles Flock on 4/19/2010 5:49 PM
We’ve added monthly coupons to the bond functions, a new bond interest function, and some tweaks to XIRR
By Charles Flock on 4/7/2010 6:23 PM

Wherein we delve deep into EXCEL’s YIELD function and discover the inconsistencies between the YIELD function and the PRICE function in EXCEL.

By Charles Flock on 3/5/2010 9:09 PM

Using the FV function to calculate the value of your 401(k) when you retire.

By Charles Flock on 2/3/2010 6:27 PM
As a follow up to our previous blogs documenting problems with the XIRR function in EXCEL and what an EXCEL XIRR of 2.98023E-09 really means.
By Charles Flock on 2/2/2010 6:24 PM
Using the PV, IPMT, PPMT, and PMT functions in XLeratorDB/financial to create a loan amortization schedule in a SELECT statement in SQL Server.
By Charles Flock on 1/21/2010 8:50 PM
With the latest release of XLeratorDB/math, we add functions for calculation of the matrix product, the matrix determinant, and the matrix inverse.
By Charles Flock on 12/14/2009 8:12 PM

A look at the XLeratorDB JOINSTR function.

By Charles Flock on 11/27/2009 4:36 PM

How a simple function like PRODUCT can profoundly change the capabilities of T-SQL

By Charles Flock on 10/19/2009 5:34 PM

A brief description of the new functionality in Math release 1.02

By Charles Flock on 10/15/2009 6:19 PM

A quick look at some business intelligence that you won’t get on most dashboards.

By Charles Flock on 8/24/2009 3:50 PM
A brief introduction to some techniques that will allow you to run Monte Carlo simulations in your SQL Server database using XLeratorDB functions.
By Charles Flock on 7/31/2009 4:07 PM
In this article we discuss the ease with which a string of delimited data can be converted to normalized data by using the XLeratorDB PARSE function.
By Charles Flock on 7/14/2009 6:43 PM
If you use the EXCEL ODDFPRICE to calculate the price of a bond with an odd first coupon period, you should read this article to find out when those calculations are incorrect. Specifically, by using the EXCEL PRICE function you will discover the following three problems with the ODDFPRICE function...
By Charles Flock on 6/30/2009 6:08 PM

A brief explanation on why the XLeratorDB implementation of this function is different than the EXCEL implementation.

By Charles Flock on 5/20/2009 8:51 PM
In this blog I will demonstrate how to build a simple Black-Scholes options calculator by creating a table-valued function and using the XLeratorDB/statistics functions module.
By Charles Flock on 5/8/2009 11:55 AM

Some notes on the release of the strings package and how it works in relation to EXCEL and to some existing built-in SQL functions.

By Charles Flock on 4/8/2009 7:07 PM
Using the XLeratorDB/statistics module to calculate some baseball statistics
By Charles Flock on 4/3/2009 5:28 PM
Some notes on the release of the engineering package and how it works in relation to EXCEL.
By Charles Flock on 3/12/2009 7:19 PM
A brief discussion about the advantages of XLeratorDB over the combination of EXCEL and SQL Server, or, as we like to put it, a proof of the equation:
XLeratorDB > SQL Server + Excel
By Charles Flock on 3/2/2009 2:16 PM

Some notes on the release of the statistics package and how it works in relation to EXCEL and in relation to existing SQL Server functions with the same or similar names.

By Charles Flock on 2/24/2009 7:41 PM

One of the big problems that you may have in moving from the spreadsheet paradigm to the database paradigm is in ‘normalizing’ your data. In this article, I will attempt to explain what that means.

By Charles Flock on 1/11/2009 4:39 PM

Build your own mortgage calculator using XLeratorDB/financial.

By Charles Flock on 12/27/2008 5:35 PM

An introduction to the latest function package for SQL Server - Unit Conversions.

By Charles Flock on 12/21/2008 2:31 PM

A graphical representation of the XNPV function mentioned in last week's blog. This illustrates the polynomial nature of the XNPV function illustrating why there can be more than one correct answer for XIRR.

By Charles Flock on 12/15/2008 10:19 AM

Insight into the XIRR and XNPV functions as implemented in Microsoft Excel and in WestClinTech's XLeratorDB/financial.

By Charles Flock on 11/21/2008 6:44 PM

What are the chances that any two people in the room have the same birthday?

By Charles Flock on 11/18/2008 7:33 PM

Duration is one of those ubiquitous financial terms that is well defined but not well understood.

By Charles Flock on 11/6/2008 11:02 PM

When you win the lottery, should you take the lump sum distribution or the annuity?

By Charles Flock on 11/6/2008 10:58 PM

When we say that a bond has an odd last coupon, what do we mean?

By Charles Flock on 10/31/2008 7:00 PM

We found something interesting while testing our ODDLYIELD function

By Charles Flock on 10/22/2008 7:00 PM

Differences between the COUPDAYS calculation when the basis is 0 and DAYS360 function and why February is really the cruelest month.

By Charles Flock on 10/6/2008 10:36 AM

A brief journey into the world of significance and precision in T-SQL.

By Charles Flock on 10/1/2008 5:08 PM

The mechanics of bond pricing.

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