1253 search results for "how to import image file to R"

Calendar Strategy: Fed Days

May 6, 2014
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Calendar Strategy: Fed Days

Today, I want to follow up with the Calendar Strategy: Option Expiry post. Let’s examine the importance of the FED meeting days as presented in the Fed Days And Intermediate-Term Highs post. Let’s dive in and examine historical perfromance of SPY during FED meeting days: Please note 100 day moving average filter above. If we

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7 R Quirks That Will Drive You Nutty

May 5, 2014
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7 R Quirks That Will Drive You Nutty

7 R Quirks That Will Drive You Nutty StumpedEvery language has its idiosyncrasies. Some “designer”“ type languages have less due to extreme thoughtfulness of language engineers. I suspect Julia for example has many less quirks. However, despite...

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Five Reasons to Teach Elementary Statistics With R: #3

May 4, 2014
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Five Reasons to Teach Elementary Statistics With R:  #3

Introduction Reason #3: RStudio’s shiny Examples “Slow” Simulation Understanding Model Assumptions Types of Error Illustrating Fine Points Playing Games

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Five Reasons to Teach Elementary Statistics With R: #3

May 4, 2014
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Five Reasons to Teach Elementary Statistics With R:  #3

Introduction Reason #3: RStudio’s shiny Examples “Slow” Simulation Understanding Model Assumptions Types of Error Illustrating Fine Points Playing Games

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Calendar Strategy: Option Expiry

May 2, 2014
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Calendar Strategy: Option Expiry

Today, I want to follow up with the Calendar Strategy: Month End post. Let’s examine the perfromance Option Expiry days as presented in the The Mooost Wonderful Tiiiiiiime of the Yearrrrrrrrr! post. First, I created two convenience functions for creating a calendar signal and back-testing calendar strategy: calendar.signal and calendar.strategy functions are in the strategy.r

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Plotting Microtiter Plate Maps

May 1, 2014
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Plotting Microtiter Plate Maps

I recently wrote about my workflow for Analyzing Microbial Growth with R. Perhaps the most important part of that process is the plate map, which describes the different experimental variables and where they occur. In the example case, the plate map described which strain was growing and in which environment …

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Plotting Microtiter Plate Maps

May 1, 2014
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Plotting Microtiter Plate Maps

I recently wrote about my workflow for Analyzing Microbial Growth with R. Perhaps the most important part of that process is the plate map, which describes the different experimental variables and where they occur. In the example case, the plate map described which strain was growing and in which environment for each of the wells used in a...

Read more »

Plotting Microtiter Plate Maps

May 1, 2014
By
Plotting Microtiter Plate Maps

I recently wrote about my workflow for Analyzing Microbial Growth with R. Perhaps the most important part of that process is the plate map, which describes the different experimental variables and where they occur. In the example case, the plate map described which strain was growing and in which environment for each of the wells used in a...

Read more »

brainR: Put your brain on the Cloud!

April 29, 2014
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brainR: Put your brain on the Cloud!

In my work, we have come across problems where we wanted to visualize data in 4 dimensions (4D). The data came as brains, which are represented as 3D volumes and we wanted to visualize them at different time points (hence 4D). We were using images that are acquired one image per visit (CT structural scans,

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Calendar Strategy: Month End

April 27, 2014
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Calendar Strategy: Month End

Calendar Strategy is a very simple strategy that buys an sells at the predetermined days, known in advance. Today I want to show how we can easily investigate performance at and around Month End days. First let’s load historical prices for SPY from Yahoo Fiance and compute SPY perfromance at the month-ends. I.e. strategy will

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