我正在尝试检查{1,...,M}中是否存在整数i,使得a_i =1,b_i = 0,以及{1,...,M}中是否存在整数j,使得b_j =1,a_j =0。如果这种情况成立,则输出1(不可比较);否则,输出0(它们是可比较的)。
我试过这个:
a<-c(1,0,1,0)
b<-c(1,0,0,1)
M<-length(a)
incomparable<-function(M, a, b)
{
for(i in 1:M){
for(j in 1:M){
if(a[i]!=b[i] && b[j]!=a[j]) {
print (1)
}
else {
print(0)
}
}
}
}
incomparable(M,a,b)
> incomparable(M,a,b)
[1] 0
[1] 0
[1] 0
[1] 0
[1] 0
[1] 0
[1] 0
[1] 0
[1] 0
[1] 0
[1] 1
[1] 1
[1] 0
[1] 0
[1] 1
[1] 1
我只需要0或1作为我的输出。我如何修复我的代码?
发布于 2020-08-30 06:24:41
我相信这适用于您所描述的条件。
incomparable <- function(a,b){
cond1 <- sum(a>b) > 0 # Returns true is if there is at least one case such that a_i is 1 and b_i is 0
cond2 <- sum(b>a) > 0 # True if at least one case such that one case with b_i is 1 and a_i is 0
cond1*cond2
}
##### Check a case where they are incomparable vectors
a<-c(1,0,0,1,0,0,1,0)
b<-c(1,0,0,1,1,0,0,0)
incomparable(a,b)
[1] 1
##### Check case where a = b
a<-c(1,0,0,1)
b<-c(1,0,0,1)
incomparable(a,b)
[1] 0
#### Case where a \subset b
a<-c(1,0,0,0,1,0,1)
b<-c(1,0,0,1,1,0,1)
incomparable(a,b)
[1] 0
### Case where b \subset a
a<-c(1,1,1,0,1,0)
b<-c(1,1,0,0,1,0)
incomparable(a,b)
[1] 0
https://stackoverflow.com/questions/63657820
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