Metodiskt tänkande

Objektorienterad programmering med S3 och R6 i R

Richie Cotton

Data Evangelist at DataCamp

ch2_2-methodical-thinking.003.png

methods

methods("mean") # or methods(mean)

mean.Date     mean.default  mean.difftime mean.POSIXct 
mean.POSIXlt 
see '?methods' for accessing help and source code

ch2_2-methodical-thinking.009.png

methods(class = "glm") # or methods(class = glm)

add1           anova          coerce        
confint        cooks.distance deviance      
drop1          effects        extractAIC    
family         formula        influence     
initialize     logLik         model.frame   
nobs           predict        print         
residuals      rstandard      rstudent      
show           slotsFromS3    summary       
vcov           weights       
see '?methods' for accessing help and source code

methods() returnerar S3 och S4-metoder

.S3methods(class = "glm")

add1           anova          confint       
cooks.distance deviance       drop1         
effects        extractAIC     family        
formula        influence      logLik        
model.frame    nobs           predict       
print          residuals      rstandard     
rstudent       summary        vcov          
weights       
see '?methods' for accessing help and source code

.S4methods(class = "glm")

coerce      initialize  show        slotsFromS3
see '?methods' for accessing help and source code

Sammanfattning

methods() hittar metoder för en generisk funktion
... eller för en klass
.S3methods() hittar enbart S3-metoder

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Objektorienterad programmering med S3 och R6 i R