delete group random

[wateryfield]

Hi, everyone!

I get some polygon group such as S1 S2 S3 S4……

How can i delete the group random such as S1 S5 S8…… and S1-S10  in delete node by expression.

I can random seletion group by foreach node then delete it.

But i can not figure out a simple expression in delete node.

I have search for tips form forums, it may somebody already post a same problem, but i failed.

 

Any help.

Thanks so much!

random_delete_group.hip

Edited March 15, 2014 by wateryfield

[pezetko]

You can use something like this expression in Group parameter:

S*[`int(fit01(rand($F),0,999))`]

[wateryfield]

 

You can use something like this expression in Group parameter:

S*[`int(fit01(rand($F),0,999))`]

Thanks you guys. helpful!

And how can i delete such as S1-S5 group, or get a group list .

like: S[1-5] 

But it is not working.

Thanks.

[pezetko]

S[12345]

This will select groups S1-S5

 

S?[12345]

This will select any group with name 'S' that have then 2 characters and last one is digit in <1,5> range. (S11,S21,S31,S12,S23,S33, SA1, ST5, SR2, etc..)

 

S*[12345]

This will select any group with name starting with 'S' where is last digit in <1,5> range (S5, S15, S35, START5, Sun4875 etc..)

Look at Pattern matching:

http://www.sidefx.com/docs/houdini13.0/expressions/_patterns

Edited March 16, 2014 by pezetko