[R] knittr: non-numeric argument to binary operator

[John Kane]

We need some idea of what you were actually doing (i.e code, data, ... )

See http://adv-r.had.co.nz/Reproducibility.html for some suggestions.
John Kane
Kingston ON Canada


> -----Original Message-----
> From: mark at markdrummond.ca
> Sent: Sun, 26 Apr 2015 16:41:32 -0400
> To: r-help at stat.math.ethz.ch
> Subject: [R] knittr: non-numeric argument to binary operator
> 
> knittr is giving me the above error. The code it is failing on is
> multiplying two numeric features of a data frame. I can run the code
> by hand and it works fine, but when I try to knit my document, knittr
> chokes on the same line.
> 
> When kitting:
> 
> Quitting from lines 161-175 (RepData_PeerAssessment2.Rmd)
> Error in storm_data$PROPDMG * storm_data$property_damage_cost_factor :
>   non-numeric argument to binary operator
> Calls: <Anonymous> ... handle -> withCallingHandlers -> withVisible ->
> eval -> eval
> Execution halted
> 
> Running the same lines manually (CTRL+Enter) from the .Rmd file:
> 
>> storm_data$total_damage <-
> + (storm_data$PROPDMG * storm_data$property_damage_cost_factor) +
> + (storm_data$CROPDMG * storm_data$crop_damage_cost_factor)
>> str(storm_data$total_damage)
>  num [1:902297] 25 2.5 25 2.5 2.5 2.5 2.5 2.5 25 25 ...
>> 
> 
> Call me baffled. Any pointers are greatly appreciated at this point.
> 
> --
> Cheers, Mark
> 
> Mark Drummond
> mark at markdrummond.ca
> 
> When I get sad, I stop being sad and be Awesome instead. TRUE STORY.
> 
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> and provide commented, minimal, self-contained, reproducible code.

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