Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (1.7 MB bytes)

Title: Programming Details for MDPLOT: A Program for Plotting Multi-Dimensional Data

Author: Nance, W.L.; Polmer, B.H.; Keith, G.C.;

Date: 1975

Source: Gen. Tech. Rep. SO-7. New Orleans, LA: U.S. Dept of Agriculture, Forest Service, Southern Forest Experiment Station. 26 p.

Publication Series: General Technical Report (GTR)

Description: The program is written in ASA FORTRAN IV and consists of the main program (MAIN) with 14 subroutines. Subroutines SETUP, PLOT, GRID, SCALE, and 01s are microfilm-dependent and therefore must be replaced with the equivalent routines written for the high resolution plotting device available at the user's installation. The calls to these subroutines are flagged by comment cards in the program listings to aid in this conversion. Users may implement the program with page plotting capability only (though this is not recommended) by simply deleting the microfilm dependent subroutines and the calls to the same. Subroutine CALC is available in two versions. The first version, listed on page 7, directly calculates the elements of the projection vector, at, for each observation vector xi--hence the projection vector is calculated anew for each observation vector. The second version, listed on page 6, uses the pre-calculated values of at, stored in the matrix Fstar (listed on pages 18-26). Either version of the subroutine may be used: the first version having the advantage of smaller core requirements, and the second version having the advantage of much faster execution times but larger core requirements (about 5000 36-bit words). The present version of the program allows up to 250 observation vectors, 50 variables, and computes 99 plotting points per observation vector. This version requires approximately 58K words using the second version of CALC. By reducing the number of observations allowed from 250 to 100, the core requirements are reduced to about 42K words. Note that these core requirements include the microfilm dependent coding, which is about 5K. Reduction of the program to a core requirement of 32K (ideal for many installations) could easily be achieved by reducing the number of observation vectors. to 100, using the first version of CALC, and eliminating the microfilm dependent coding.

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to pubrequest@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Nance, W.L.; Polmer, B.H.; Keith, G.C. 1975. Programming Details for MDPLOT: A Program for Plotting Multi-Dimensional Data. Gen. Tech. Rep. SO-7. New Orleans, LA: U.S. Dept of Agriculture, Forest Service, Southern Forest Experiment Station. 26 p.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.