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2006 Aug 02
1
questions on aggregate data
Dear friends,
my question is how to aggregate dataset and the inverse manipulation.
e.g.My dataset
data structure1:
x
1
1
2
3
3
data structure2:
x freq
1 2
2 1
3 2
Then how to generate dataset2 from dataset1 and generate dataset1 from
dataset2?
e.g. dataset2 from dataset1 :
x<-c(1,1,2,3,3)
a<-tab(x)
as.data.frame(a)
*But i can't do the inverse manipulation:generate dataset1 from dataset2*,
anybody can help me on the two dif...
2015 Aug 14
2
[LLVM RFC] Add llvm.typeid.for intrinsic
This is for BPF output. BPF program output bytes to perf through a
tracepoint. For decoding such data, we need a way to describe the format
of the buffer. This patch is a try which gives each variable a unique
number by introducing a new intrinsic 'llvm.typeid.for'.
At the bottom is an example of using that intrinsic and the result
of
$ clang -target bpf -O2 -c -S ./test_typeid.c