A Compendium Of R Errors

Sumendar Karupakala has a bunch of errors you might find in R, as well as their explanations and fixes:

#pull out the animals which are dogs
animaldata[animaldata$Animal.Type == “Dog” ] # throuws an error
Error in `[.data.frame`(animaldata, animaldata$Animal.Type == “Dog”): undefined columns selected
Traceback:
1. animaldata[animaldata$Animal.Type == “Dog”]
2. `[.data.frame`(animaldata, animaldata$Animal.Type == “Dog”)
3. stop(“undefined columns selected”)
In [8]:
#fixed error
animaldata[animaldata$Animal.Type == “Dog”, ] # missedout comma with in the bracket

Some of it is basic syntax; others are a bit nastier.

Related Posts

Building Dynamic Row Headers With ML Services

Dave Mason tries to get around his RESULT SETS limitation when using SQL Server Machine Learning Services: The columns in the data frame clearly have names, but SQL Server isn’t using them. The data frame columns have types in R too (more on this in a moment). Now that makes me wonder about the data […]

Read More

Defining Result Sets With ML Services

Dave Mason covers a pain point in SQL Server Machine Learning Services: The example above is so simple, defining the RESULT SETS poses no problems. But what if the format of the output isn’t known at design time? R (or Python) might take the input data set and add, remove, or change columns conditionally. Further, […]

Read More

Leave a Reply

Your email address will not be published. Required fields are marked *

Categories

November 2017
MTWTFSS
« Oct  
 12345
6789101112
13141516171819
20212223242526
27282930