There have been several inquiries since the time we released our first entry on DFT, especially about using the DFT components to represent the input data set as the sum of the trigonometric sine-cosine functions. The inquiries were motivated by…
Spider Financial is excited to announce the new NumXL Affiliate and Agent Program! We look forward to working with affiliate marketers to grow the NumXL community. We are even more excited to introduce the world of affiliate marketing to Spider…
In this study, we examine the daily prices of the first four (4) contracts of WTI CL futures listed on NYMEX, compute the number of days to the delivery month for each contract, and carry out principal component analysis (PCA)…
We are excited to announce a new change to our online order system: we have switched our payment processor to Fast Spring (Santa Barbara, CA USA). Using Fast Spring’s simple yet secure shopping cart system, we are able to offer…
In this case, we examine the highway retail price ($/Gallon) for “No.2 Ultra Low Sulfur (0-15 ppm) Diesel” in the EIA nine (9) PADD regions and carry on principal component analysis in an attempt to find a minimal subset of…
In this paper, we will apply simple linear regression to calculate the CAPM beta for two technology stocks: Microsoft (MSFT) and IBM, then validate the model’s assumptions, identify influential data-points (e.g. outlier), ensure structural stability over the data sample, and…
With great reluctance, Spider will be increasing the price of a NumXL license with the release of NumXL 1.60 (Apache). The NumXL annual license price will increase to $200 USD/yr (a $50 USD increase) for new customers only. That means all…
We’d love to hear your ideas and experience with NumXL and our support. To keep the reviews objective and let us truly assess where we stand in terms of service quality, we are asking you to leave anything special aside…
We are thrilled to announce the official release of a new version of NumXL – 1.59 Tucson Along with numerous fixes, NumXL 1.59 supports 64-bit version of Microsoft Excel 2010 and 2013, which will make it possible to analyze larger…
As 2012 comes to an end, we are putting NumXL on a new development track and marching toward our next major release – NumXL 1.60 APACHE. During the prior release (1.59 Tucson), we made major changes to NumXL underlying architecture…
