Bookmarks, Tags & Lists

• All three of these Spotfire features are used to capture pieces of an analysis, but have you ever wondered when to use one versus the other?
• Have you ever wondered about the subtle differences between them?

• Have you ever seen a red line around a pie chart and not understood why it was there?

We often use Excel templates to calculate the Call and Put option prices with required parameters and the relationship between the parameters are expressed in Excel Functions. One tricky problem with the Excel Function is that if you change the cell position, accidentally click on a wrong cell, or if you want to export the results and utilize the templates again, the embedded functions may change accordingly and generate wrong answers.

Welcome to the next installment of our Analytics Journey, which explores how we at Ruths.ai apply the CRISP-DM method to our Data Science process. Previously, we looked at an overview of the methodology as a whole as well as the Business Understanding, Data Understanding, Data Preparation, Modeling, and Evaluation stages.  Next, we examine the final stage:  Deployment.

The.  Final.  Stage.  Now, we just have to turn this thing on and reap the rewards, right?

Unfortunately, Deployment does not just happen with the push of a George Jetson button.

• Are unsupported HTML tags confusing and maddening?
• Have you ever experienced problems getting JavaScript to work in Spotfire?
• Would you like to make text areas look more visually appealing and professional?

(Image Source: opencv.org)

Support Vector Machines (SVMs) is one of the most popular and most widely used machine learning algorithms today. It is robust and allows us to tackle both classification and regression problems. In general, SVMs can be relatively easy to use, have good generalization performance, and often do not require much tuning. Follow this link for further information regarding support vector machines. To help illustrate the power of SVMs, we thought it would be useful to go through an example using a custom template we have created for SVMs.

Today, we will look at how to place a traditional heat map on top of a map chart in Spotfire. While Spotfire has a heat map feature, the graphic generally serves as a stand alone showing hot and cold spots on a grid. But, heat maps deliver so much more impact when tethered to spatial coordinates, whether they be on a geographic map or simply in our everyday space. Think of those fantastic lava lamp resembling blurs we see on weather maps, body heat images, and sports broadcasts indicating hot and cold zones.

The “spTimer” package uses three Bayesian models to fit Spatio-Temporal Data. The data may be given at sparse spatial stations, where observations at each station are considered time series. The package can model the residual spatio-temporal variation to measure uncertainty. It also gives flexibility to customize covariance function selection, the hyper-parameters of the prior distributions and the tuning parameters for the implemented MCMC algorithms.

To veteran Spotfire users, the distinction between Marking, Filtering, and Limiting might seem obvious; however, to an uninitiated member, some similarities might cause confusion. In fact, one often can obtain the same exact result using combinations of Marking, Filtering, and Limiting. All the methods allow the user to make a click in one area that affects other visualizations. All the methods in their own way highlight a subset of the data.

Incomplete data is a problem that Data Scientists face every day. Most common practices vary from complete deletion of the observations with missing values, substitution by a fixed value, or performing imputation using statistics like the mean or median. Since these approaches have limitations on capturing the structure of the data, scientists have developed more sophisticated methods.