I'm trying to order a data set using the following:
library(dslabs)
data(murders)
pop<- murders$population
pop_min_index <- order(pop)
min(pop_min_index)
When I use this, R presents "pop_min_index" as all the values from the data set, when I just want the first value, i.e. the answer should be "51", where as my result is coming out as "51, 9, 46, 35, 2, 42", etc.
I've tried using:
min(pop_min_index)
but this doesn't seem to work either
Does anyone know what is wrong my code?
Thanks
in general if you have a vector and want only the first entry use
head(your_vector,n=1)
head(order(pop),n=1)
will give 51
basically I am completing a practice exercise in R, and the question is as follows:
I have to match the answer that has already been input, and achieve the same answer
well, if you need to assign the result to a specific name then thats done with the <- operator. so in this case
pop_min_index <- head(order(pop),n=1)THANK YOU
I hadn't even heard of "head", is this the only way to do this question, as we haven't been taught this yet, so just wondering if there is some content missing from the instructions i've been given?
you may have been taught how to arbitrarily index into a vector with square brackets.
In this case that would be
pop_min_index <- order(pop)[1]That was exactly my issue. I kept inputting that as:
library(dslabs)
data(murders)
pop<- murders$population
pop_min_index <- order(pop)
pop_min_index[1]