CODEWITHSUNDEEP
rerror-handling
Anand Roopsind
Anand Roopsind

Reputation: 591

Error:attempt to apply non-function

I'm trying to run the following code in R, but I'm getting an error.

I'm not sure what part of the formula is incorrect. Any help would be greatly appreciated.

> censusdata_20$AGB93 = WD * exp(-1.239 + 1.980 * log (DIAM93) + 0.207 (log(DIAM93))^2 
                        - 0.0281 (log(DIAM93))^3)
Error: attempt to apply non-function

Upvotes: 37

Views: 224015

Answers (2)

stevec
stevec

Reputation: 52208

I got the error because of a clumsy typo:

This errors:

knitr::opts_chunk$seet(echo = FALSE)

Error: attempt to apply non-function

After correcting the typo, it works:

knitr::opts_chunk$set(echo = FALSE)

Upvotes: 1

Ben Bolker
Ben Bolker

Reputation: 226047

You're missing *s in the last two terms of your expression, so R is interpreting (e.g.) 0.207 (log(DIAM93))^2 as an attempt to call a function named 0.207 ...

For example:

> 1 + 2*(3)
[1] 7
> 1 + 2 (3)

Error: attempt to apply non-function

Your (unreproducible) expression should read:

censusdata_20$AGB93 = WD * exp(-1.239 + 1.980 * log (DIAM93) + 
                              0.207* (log(DIAM93))^2  -
                              0.0281*(log(DIAM93))^3)

Mathematica is the only computer system I know of that allows juxtaposition to be used for multiplication ...

Upvotes: 49

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