1265 search results for "Excel"

Update on Scary Derivatives

November 16, 2011
By
Update on Scary Derivatives

After reading Bloomberg’s article, JPMorgan Chase & Co. and Goldman Sachs Group Inc., among the world’s biggest traders of credit derivatives, disclosed to shareholders that they have sold protection on more than $5 trillion of debt globally. ...

Read more »

Performance measurement is about decisions

November 16, 2011
By
Performance measurement is about decisions

The return of a hypothetical fund was 17.9% in 2010.  We want to know if that is good or bad. The benchmark method The assets in the portfolio are constituents of the S&P 500, so we can compare our fund return to the return of the index. Figure 1: 2010 returns of: the fund and … Continue reading...

Read more »

Grrr…

November 15, 2011
By
Grrr…

I’ve been working through Gelman et al.’s otherwise excellent Bayesian Data Analysis and it’s going reasonably well. My statistics is a little bit rusty so it’s taken time to work through all of the exercises and really understand what’s going on. But I...

Read more »

First thoughts on R

November 2, 2011
By
First thoughts on R

Having worked just a little with R, I have some first impressions to share.  I'll give you some links to resources I found helpful with writing the previous project. First, the documentation is not very good.  I struggled on previous attempts to figure things out.  I still find it crap shoot when I Google, looking for an answer....

Read more »

Teaching with R: the tools

November 1, 2011
By

I bought an Android phone, nothing fancy just my first foray in the smartphone world, which is a big change coming from the dumb phone world(*). Everything is different and I am back at being a newbie; this is what … Continue reading →

Read more »

Plotting grouped data vs time with error bars in R

October 31, 2011
By
Plotting grouped data vs time with error bars in R

This is my first blog since joiningR-bloggers. I’m quite excited to be part of this group and apologize if I boreany experienced R users with my basic blogs for learning R or offendprogrammers with my inefficient, sloppy coding. Hopefully writing for...

Read more »

Plotting grouped data vs time with error bars in R

October 31, 2011
By
Plotting grouped data vs time with error bars in R

This is my first blog since joining R-bloggers. I’m quite excited to be part of this group and apologize if I bore any experienced R users with my basic blogs for learning R or offend programmers with my inefficient, sloppy … Continue reading →

Read more »

XLConnect 0.1-7

October 24, 2011
By
XLConnect 0.1-7

Mirai Solutions GmbH (http://www.mirai-solutions.com) is pleased to announce the availability of XLConnect 0.1-7. This release includes a number of improvements and new features: Performance improvements when writing large xlsx files New workbook data extraction & replacement operators [, [<-, [[, … Continue reading →

Read more »

Isarithmic Maps of Public Opinion Data

October 24, 2011
By
Isarithmic Maps of Public Opinion Data

As a follow-up to my isarithmic maps of county electoral data, I have attempted to experiment with extending the technique in two ways. First, where the electoral maps are based on data aggregated to the county level, I have sought to generalize the method to accept individual responses for which only zip code data is … Continue reading →

Read more »

understanding computational Bayesian statistics: a reply from Bill Bolstad

October 23, 2011
By
understanding computational Bayesian statistics: a reply from Bill Bolstad

Bill Bolstad wrote a reply to my review of his book Understanding computational Bayesian statistics last week and here it is, unedited except for the first paragraph where he thanks me for the opportunity to respond, “so readers will see that the book has some good features beyond having a “nice cover”.” (!) I simply processed

Read more »