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Eileen18
‎08-28-2018
  • 4 Posts
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Proc factor: principle component scores

by Calcite | Level 5 in Statistical Procedures
‎08-28-2018 09:30 AM
‎08-28-2018 09:30 AM
Hi! I am using proc factor to run a principle components analysis (to note: I went with this procedure over princomp bc I wanted more of the output...if i need to switch to princomp then I will!)   Here is my question: based on the SAS documentation below, I am confused whether proc factor produces principle component scores (discussion accompanying 33.1.8) or if one has to use proc princomp to have the principle component scores (discussion accompanying 33.1.19).     https://support.sas.com/documentation/cdl/en/statug/63347/HTML/default/viewer.htm#statug_factor_sect028.htm   Again, per this documentation, it seems that the factor1 generated automatically by proc factor is not equivalent to principle component scores (33.1.8) but I'm confused as this seems to be the correct equation.  Caution against using factor1 if one is wanting to use the components in a subsequent regression model? or is it correct?    thank you SO much for the support!    ... View more

Re: Changing display of y-axis dedrogram (proc cluster, proc tree)

by Calcite | Level 5 in SAS Procedures
‎10-02-2017 11:16 AM
‎10-02-2017 11:16 AM
Ah- great to know it does in fact work.  I tried the plots=dendrogram(ch=3 5 unit=in) option and am seeing the attached (a blank graph; ods graphics are on. I am in SAS enterprise 9.4) so maybe it's something with my data (too many levels to the id var?) I will continue to try some different sub-options and explore different methods as well.     thank you again!     ... View more

Re: Changing display of y-axis dedrogram (proc cluster, proc tree)

by Calcite | Level 5 in SAS Procedures
‎10-01-2017 06:36 PM
‎10-01-2017 06:36 PM
thank you so much for your reply! I tried the below but it isn't working; nothing changed in the display.  Here is what I tried: I reviewed the computeheight option and tried increasing by a factor of 3 to start(?) and  changed the unit to inches.  Seems I'm missapplying the suboptions, but not sure what is wrong. I tried searching for an example that applied these suboptions and couldn't find one. Any suggestions for me? Thank you again very much!    Proc cluster simple method=centroid rmsstd rsquare nonorm out=tree plots(maxpoints=1000) plots=dendrogram(unit=in computeheight=3.12 .375)   ; id condition;  var active_score;  run;  ... View more

Changing display of y-axis dedrogram (proc cluster, proc tree)

by Calcite | Level 5 in SAS Procedures
‎10-01-2017 03:08 PM
‎10-01-2017 03:08 PM
Hi, first off, I am new to cluster analysis and am still learning the appropriate methods to emply.  I am trying to divide a variable ("condition") with 300 levels  into clusters based on 1 numberical/continuous variable ("active_score"). Using proc cluster to start (code below) I am seeing that the y-axis of the dendrogram is unreadable as the labels are all on top of eachother (dendrogram image attached).  I was trying to find a way to space out the labels but unsuccessfully.. any ideas? It also might just be that proc cluster is not the best way to go (proc fastclus or proc varclus?) Again, I'm learning so might need to move to another procedure but still wondering if I can make it work to be able to adjust the y-axis to see what I have. I'm using SAS 9.4.  Thank you in advance!!   Proc cluster simple method=centroid rmsstd rsquare nonorm out=tree plots(maxpoints=1000); id condition;  var active_score;  run;  proc tree out=cluster nclusters=5 inc=10 ;  id condition;  copy active_score;    proc sort; by cluster;   proc print; by cluster;  var  condition active_score;  run;                  ... View more
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