Re: [R] passing known medoids to clara() in the cluster package
Martin, Just wanted to check on the status of including known medoids into calls to the clara() function within the cluster package. Cheers, Dylan On Monday 10 April 2006 14:25, Dylan Beaudette wrote: Thanks for the reply. On Sunday 09 April 2006 11:46 pm, Martin Maechler wrote: DylanB == Dylan Beaudette [EMAIL PROTECTED] on Sun, 9 Apr 2006 19:28:44 -0700 writes: DylanB Greetings, I have had good success using the clara() DylanB function to perform a simple cluster analysis on a DylanB large dataset (1 million+ records with 9 variables). DylanB Since the clara function is a wrapper to pam(), DylanB which will accept known medoid data - I am wondering DylanB if this too is possible with clara() ... The DylanB documentation does not suggest that this is DylanB possible. indeed, it doesn't -- because it's not yet possible. I (as maintainer of cluster) had added the ``known medoid'' option to pam() a while ago last June (for cluster version 1.10.0), and had left a note my TODO file to do the same for clara(). Ah. that would explain things ! :) . I will check back periodically to see when this feature is completed. Unfortunately it's not true that clara() was a wrapper to pam() as you state above. I must have misread the manual pages... Given your wish and clear use case situation, I'm more motivated to approach this particular 'TODO' item! Martin Maechler, ETH Zurich DylanB Essentially I am trying to implement a supervised DylanB classification of numerous geographic data DylanB layers. The unsupervised approach using clara() DylanB works well, but I feel the output classes would be DylanB more meaningful if I were able to let clara() know DylanB about the classes that I have in mind. DylanB Is this at all feasible, or am I trying to DylanB accomplish something that is not possible? Thanks Martin! I will give pam() a try, and see if it can handle the large dataset that I am currently using clara() for -- usually only about 5 seconds are required for clara() to complete. -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at Davis 530.754.7341 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] passing known medoids to clara() in the cluster package
DylanB == Dylan Beaudette [EMAIL PROTECTED] on Sun, 9 Apr 2006 19:28:44 -0700 writes: DylanB Greetings, I have had good success using the clara() DylanB function to perform a simple cluster analysis on a DylanB large dataset (1 million+ records with 9 variables). DylanB Since the clara function is a wrapper to pam(), DylanB which will accept known medoid data - I am wondering DylanB if this too is possible with clara() ... The DylanB documentation does not suggest that this is DylanB possible. indeed, it doesn't -- because it's not yet possible. I (as maintainer of cluster) had added the ``known medoid'' option to pam() a while ago last June (for cluster version 1.10.0), and had left a note my TODO file to do the same for clara(). Unfortunately it's not true that clara() was a wrapper to pam() as you state above. Given your wish and clear use case situation, I'm more motivated to approach this particular 'TODO' item! Martin Maechler, ETH Zurich DylanB Essentially I am trying to implement a supervised DylanB classification of numerous geographic data DylanB layers. The unsupervised approach using clara() DylanB works well, but I feel the output classes would be DylanB more meaningful if I were able to let clara() know DylanB about the classes that I have in mind. DylanB Is this at all feasible, or am I trying to DylanB accomplish something that is not possible? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] passing known medoids to clara() in the cluster package
Thanks for the reply. On Sunday 09 April 2006 11:46 pm, Martin Maechler wrote: DylanB == Dylan Beaudette [EMAIL PROTECTED] on Sun, 9 Apr 2006 19:28:44 -0700 writes: DylanB Greetings, I have had good success using the clara() DylanB function to perform a simple cluster analysis on a DylanB large dataset (1 million+ records with 9 variables). DylanB Since the clara function is a wrapper to pam(), DylanB which will accept known medoid data - I am wondering DylanB if this too is possible with clara() ... The DylanB documentation does not suggest that this is DylanB possible. indeed, it doesn't -- because it's not yet possible. I (as maintainer of cluster) had added the ``known medoid'' option to pam() a while ago last June (for cluster version 1.10.0), and had left a note my TODO file to do the same for clara(). Ah. that would explain things ! :) . I will check back periodically to see when this feature is completed. Unfortunately it's not true that clara() was a wrapper to pam() as you state above. I must have misread the manual pages... Given your wish and clear use case situation, I'm more motivated to approach this particular 'TODO' item! Martin Maechler, ETH Zurich DylanB Essentially I am trying to implement a supervised DylanB classification of numerous geographic data DylanB layers. The unsupervised approach using clara() DylanB works well, but I feel the output classes would be DylanB more meaningful if I were able to let clara() know DylanB about the classes that I have in mind. DylanB Is this at all feasible, or am I trying to DylanB accomplish something that is not possible? Thanks Martin! I will give pam() a try, and see if it can handle the large dataset that I am currently using clara() for -- usually only about 5 seconds are required for clara() to complete. -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at Davis 530.754.7341 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] passing known medoids to clara() in the cluster package
Greetings, I have had good success using the clara() function to perform a simple cluster analysis on a large dataset (1 million+ records with 9 variables). Since the clara function is a wrapper to pam(), which will accept known medoid data - I am wondering if this too is possible with clara() ... The documentation does not suggest that this is possible. Essentially I am trying to implement a supervised classification of numerous geographic data layers. The unsupervised approach using clara() works well, but I feel the output classes would be more meaningful if I were able to let clara() know about the classes that I have in mind. Is this at all feasible, or am I trying to accomplish something that is not possible? Cheers, -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at Davis 530.754.7341 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
