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Math Forum » Discussions » Software » comp.soft-sys.math.mathematica

Topic: Delete elements from list..
Replies: 17   Last Post: Mar 8, 2011 5:37 AM

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Maarten van der Burgt

Posts: 8
Registered: 5/7/10
Delete elements from list..
Posted: Feb 21, 2011 7:31 PM
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Hallo,

I have a list like:

mylist = {1, 2, 3, 4, 5, 6, 4, 5, 7, 8, 9}

I want to delete any element which is not strictly larger than the
previous element, until my new list has only increasing values.

This means in mylist above I want to delete the 4 and the 5 at position
7 and 8.

Any elegant and fast way for doing this?

In practice I want to do this for a large amount (1000) of very large
lists (1000). So speed is important.

Thanks for your help.

Maarten

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