Displaying 3 results from an estimated 3 matches for "carmake".
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carmakes
2006 Mar 22
3
Parent-Child Tables Help
can someone help me with this
i have a table
cars
(
id int
model_id int
make_id int
color_id int
description text
constraint fk_cars_carmake foreign key(make_id) references
carmakes(id),
constraint fk_cars_carmodel foreign key(model_id) references
carmodels(id),
constraint fk_cars_color foreign key(color_id) references colors(id)
)
carmakes
(
id int
carmake varchar
)
carmodels
(
id int
carmake_id int
carmodel varchar
)
color...
2003 Dec 30
4
Assignments in loops
Greetings all. Any help with the following would be appreciated.
I want to create a data frame for each file in a directory. The following
code does not work but it may show what I am trying to do:
carmakes <- c('BMW','Chrysler','Citroen','Fiat','Ford','Holden','Honda',
'Mercedes','MG','Mitsubishi','Nissan','Peugeot','Renault','Subaru','Toyota',
'VW')
for (brand in carmak...
2011 May 21
1
'apply' with additional class variable
...do is apply a custom function over each column of this matrix, but the function will behave differently depending on the make of the car, so each time a column is passed into my custom function, the function needs to know the make of the car. What I imagine being able to do is something like this:
carmake<-c("Toyota","Ford","Chevy")
x<-matrix(1:12,nrow=4)
colnames(x)<-c("Car1","Car2","Car3")
rownames(x)<-c("Horsepower","TopSpeed","Weight","Cost")
res<-apply(my_matrix,2,my_func,carmake)...