• June 2007:
  • New version of GRASP for R available on CRAN
  • Refreshed website

• November 2005: WHAT’S NEW IN GRASP v.3.3 ?:
  • Correction in grasp.in function to reorder factor levels named with numbers higher than 10 that could be ordered in alphabetic order instead of numerical orders.
  • Introduction of an option to choose color graphical outputs instead of grey outputs (especially useful with prediction maps)
  • Addition of X axis label in contribution plot
  • Corrections of CROSS selection function to limit the number of iterations to twice the number of predictors
  • Corrections in MINCONTRIB selection function
  • Correction of multiplicative interaction function added manually with I(X1*X2)
  • Corrections in ROC validation plots
  • Addition of point observations (presence in YYY) on top of prediction maps

• April 2005: NEW GRASP EXTENSION FOR ARCVIEW 3.x ?:
  • This is a new Arcview 3.x extension to build predictions from lookup tables and to manage Grids and Shapefiles in an easier way. The main advantage of the new extension is that it allows to build predictions from predictors that might change their maximum and minimum values without recalculating the loolup table in Splus (e.g. climate change predictions).
  • This Lookup table interpretation works only with lookup tables built with GRASP-S v.3.2 and with GRASP-R v.2.5

• April 2005: WHAT’S NEW IN GRASP v.3.2 ?:
  • New Lookup tables with additional 2 rows to store information on minimum and maximum values used to create lookup tables
  • Correction in Contribution output where Alone and Model contribution were wrongly labeled
  • Updated version of GRASP ME user manual essentially to correct the fact that autocorrelative variables are tested and not forced into models.

• April: pre-release of NEW GRASP-R VERSION:
  • A new version of GRASP was ported into R for test. It corresponds more or less to GRASP-S v.2.5 and uses Hastie's gam library in R. A final version should be made available through CRAN server soon.

• March 2005: WHAT’S NEW IN GRASP v.3.1 ?:
  

GRASP v.3.1 is a major update with many changes and additional features:

New functions:

• Plotting histogram of response variables (RVs) distribution: grasp.exp.distry()

• Plotting predictors variables (PVs) as maps: grasp.exp.xpred()

• Selecting a full model that explains a RV by PVs: grasp.mod.full()

• Testing the inclusion of a spatial trend variable stored in YYYtrend: grasp.mod.trend()

• Testing the inclusion of an autocorrelation variable stored in YYYautocor: grasp.mod.autocor()

• Testing the autocorrelation variable on the residual of the initial gam model: grasp.mod.autores()

• Creating an integrative factor variable to summarize variable interactions: grasp.mod.interact()

• Forcing an multiplicative interaction term in the model: grasp.mod.mult.interact()

• Create an ANOVA table by removing each predictors from full model: grasp.mod.anova()

Changes in structures and objects:

• MODELCALLS stores model calls instead model objects and uses therefore less memory (replaces STEPMODEL).

• VALIDATION stores now the results from grasp.mod.validate()

• XXXlut stores the minimum and maximum values of GRIDS to create lookup tables for predictions (this was saved in XXXpred in v.2.5)

• YYYtrend and YYY autocor store the trend and local autocorrelation values for responses

• YYYlut stores the minimum and maximum values of GRIDS of trends and autocorrelations of responses to create lookup tables for predictions

• Automatic creation of ..\grasplut, ..\grasplog and ..\graspgif folders in your working directory to store the results of analyses

Modification of existing functions:

• Introduction of “bruto” as a new method of variable selection using library “mda”.

• Introduction minimum contributions selection to complement existing selections

• Saving graphs directly as GIF files on your hard drive

• Many small improvements in most functions

Changes in GUI:

• A new menu offers many new links to the different functions and additional resources on the web.

• A new GRASP GUI brings together the old GRASP GUI and GRASP OPTIONS in a single GUI.

• OLDER NEWS !!!:

• Launching the BUGS TRACKER system for GRASP-S and GRASP-R at SourceForge.net (Sept.03)
• Registration of the GRASP-S project at http://sourceforge.net/projects/grasper/ , together with GRASP-R. SourceForge is a platform for the development of OpenSource softwares where vesrions of both GRASP-S and GRASP-R will be made available !
• GRASP v.2.5 and GRASP_ME v.2.5 released in September 2003. This new release present five main changes: New calculation of MODEL variable contribution, Cross-validated stepwise selection, Automatic calculation of Weights of 0s si that it equals sum of 1s, Linearization of selected GAM models, and Improved GUI.
• August 2003. Creation of user list at http://groups.yahoo.com/group/grasp_users:
  - grasp_users@yahoogroups.com to send messages
  - grasp_users-subscribe@yahoogroups.com to suscribe
  - grasp_users-unsubscribe@yahoogroups.com to unsuscribe
• March 2003. Trial dataset made available in the download section of the website containing an example of the three dataframes YYY, XXX, XXXpred used to GRASP !
• GRASP_ME v.2.4 released in March 2003. This is an updated version of the User manual taking into accounts recent developments.
• GRASP v.2.4 released in March 2003. This version remove the use of DATAFILTER and WEIGHTS objects form the Option GUI which was causing problems by assigning these variables randomly to different existing data.frames available in the working directory ! WEIGHTS and DATAFILTER still exist but are reserved to advanced users.
• GRASP v.2.3 released in November 2002. This version corrects a few bugs to help GRASP works with both Splus 2000 and SPlus 6
• GRASP website officially opens in May 2002
• GRASP v.2.2 released in April 2002. This version was developped to work with both Splus 2000 and SPlus 6
• Special issues on GLM/GAM modeling for Biodiveristy and Conservation and Ecological Modelling in press !
• Workshop on GLM/GAM modeliing at Riederalp (Switzerland) in August 2001: http://leba.unige.ch/workshop