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The leaflet package in R has built-in functionality for creating color encoded geometries and annotating with color legends. Support is lacking in the area of providing the ability to encode data with sizes or symbology except for the case of circle ma... [Read more...]

leaflegend is a package to extend the customization of legends for the leaflet package in R. The addLegend function provides some great out of the box legends based on the internal palette functions, but styling of the legend components has to be done ... [Read more...]

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When using shiny in production, often you will want to have some sort of database interactions for storing and accessing data. The DBI package provides an easy way to do the database interactions with a variety of SQL database flavors. In this example,... [Read more...]

When using shiny in production, often you will want to have some sort of database interactions for storing and accessing data. The DBI package provides an easy way to do the database interactions with a variety of SQL database flavors. In this example, I’m going to use a SQLite ... [Read more...]

Introduction Shiny modules provide a great way to organize and container-ize your code for building complex Shiny applications as well as protecting namespace collisions. I highly recommend starting with the excellent documentation from Rstudio. In thi... [Read more...]

Introduction Shiny modules provide a great way to organize and container-ize your code for building complex Shiny applications as well as protecting namespace collisions. I highly recommend starting with the excellent documentation from Rstudio. In this post, I am going to cover how to implement modules with insertUI/removeUI so ... [Read more...]

I ran into an issue the other day where I was tring to write a new table to a SQL Server Database with a non-default schema. I did end up spending a bit of time debugging and researching so I wanted to share for anyone else that runs into the ... [Read more...]

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The Open Source Routing Machine project is an excellent resource for computing routing and travel time estimates for road networks. It is an open source library that has a demo server to run API requests to. I’ll only be using one of the services (isochrones which I’ll explain ... [Read more...]

The ‘Fit Distributions’ shiny gadget allows easy automated diagnostics for fitting univariate distributions. It reads in numeric vectors in the global environment, and uses MLE to estimate the parameters of the selected distributions. The visual outputs are GOF statistics, density plot, pp-plot, and qq-plot. You can also adjust the number ... [Read more...]

Slides from my presentation at Heartland Developer Conference in La Vista, NE. [Read more...]

fitur 0.6.1 shiny gadget for fitting univariate distributions has been added added test function for distfun objects diagnostic plots now have better checks for distfun objects and lists of distfun objects fitur on CRAN [Read more...]

Adding continuous distribution testing functions Kolmogorov-Smirnov, Anderson-Darling, and Cramer-Von Mises S3 methods have now been added for distfit objects Code reformatting and cleanup fitur on CRAN Continuous Distribution GOF Tests

library(fitur)
x <- rgamma(100, 1, 1)
fit <- fit_univariate(x, 'gamma')
ks_test(fit, x)

## 
##  One-sample Kolmogorov-Smirnov test
## 
## data:  x
## D = 0.082165, p-value = 0.5093
## alternative hypothesis: two-sided

ad_test(fit, x)

## 
##  Anderson-Darling test of goodness-of-fit
##  Null hypothesis: distribution 'distfun[[2]]'
## 
## data:  x
## An = 0.49058, p-value = 0.756

cvm_test(fit, x)

## 
##  Cramer-von Mises test of goodness-of-fit
##  Null hypothesis: distribution 'distfun[[2]]'
## 
## data:  x
## omega2 = 0.079325, p-value = 0.6968

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Introduction In this excercise, I’m going to show how to automate some aspects of coding in shiny to speed up development. Traditionally, in user interface development, one has to explicitly type out each individual input argument. For small applications, this is justified and probably isn’t worth the time ... [Read more...]

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