Cropping a vector with on repeating target values

I have large vector (~10,000 entries) which contains values ranging from 70 to 0.

An abridged version could look like:

V = [70 10 5 3 2 1 0 0 0 1 2 3 5 10]

I would like to create a new vector that only contains the values preceeding V = 1 (in example, [70 10 5 3 2]). I do not want this new vector to include the values following V = 1 (even when V begins increasing above 0).

Currently, I have simplified this vector using:

index = V > 1

Which yields:

index =

  1×14 logical array

   1   1   1   1   1   0   0   0   0   0   1   1   1   1

I am not sure if this is a good first step, but I am at a dead end now. I am not sure how to select the first set of ones, knowing that in practice there will not always be the same number of values that I would like to extract.

Any help would be appreciated, and I would be happy to provide more information about my application/constraints.

Answer 1

[madhan ravi]

V(1:find(V==1,1,'first')-1)