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5h
comment Error with gwr.mixed function in GWmodel r package
Please do not post the same question on multiple forums, it is generally bad etiquette. Wait until you are not receiving an answer before posting elsewhere. It looks like the package developer found the function error and posted a fix: comments.gmane.org/gmane.comp.lang.r.geo/22834
5h
comment Programs/ languages to process netcdf files “fast”
I have found that for zonal like functions it is best to actually mask your raster(s) to the polygon and then just pull the statistic out of the results by coercing to a vector or matrix. You will be surprised how much faster this is than extract. I have run some large problems (10,000 polygons with 0.97m raster). When you mask a stack it does all rasters at once so, there is no real performance ding.
5h
comment Programs/ languages to process netcdf files “fast”
Before jumping out to a completely different language perhaps you should explore ways to speed up your R code. However, since you do not provide any details on what you have tried in R we can give no insight as to ways to potentially speed up you code. As the saying goes "there is more than one way to skin a cat" which, especially applies to R.
1d
comment Error with gwr.mixed function in GWmodel r package
It very well could be a function error. Since there is no example in the help, the CRAN check has no way to evaluate if the function works. There were some syntax changes in R base functions at 3.2.1 that are causing some function fails in spatial class objects. If this was not caught during a package check, because of missing examples, the the developer would never know that there is an issue with a function.
1d
comment Error with gwr.mixed function in GWmodel r package
What did you do to create "Yield.spdf.sub"? It sounds like you broke the relationship between the row.names in the @data slot and the polygon ID's.
Aug
30
comment MCC-LiDAR error: version minor out of range
You should be able to force the application to run as 32 bit but, I do find that as a bit odd. The OS should not matter and MCC runs fine. It could be that the since 64-bit numbers cannot be interpreted in a 32-bit OS something is going on at the OS level that I am unaware of. Try changing the compatibility setting of the application by right clicking the icon, selecting properties and then the compatibility tab. If available, select Windows XP as the compatibility mode.
Aug
29
revised MCC-LiDAR error: version minor out of range
added 127 characters in body
Aug
29
answered MCC-LiDAR error: version minor out of range
Aug
27
comment Weighted averages: accounting for grid cell surface variation in proportion to the cosine of its latitude
How large is your study area? If it is not that large (eg, smaller than a US state) you could reproject your DEM into a projected coordinate system and recalculate TRI. I would imagine that bias would not be that large at smaller extents. Bias based on cell distortion is something that is of great concern when you start getting to continental or global geographical extents.
Aug
26
comment Why aren't there LiDAR records in some black and white parts of the scene?
Looks like the sensor's intensity trigger was not adjusted to compensate for the target material.
Aug
26
comment How to effectively read and analyze multiple dbf tables?
Here are the ESRI descriptions for their 3 primary database formats (webhelp.esri.com/arcgisserver/9.3/java/index.htm#geodatabases/…). None of them use dbf. A personal geodatabase uses MS Access, a file geodatabase is a propriety binary format and ArcSDE can sit on top of an external relational database (eg., Oracle, MS SQL, PostgreSQL). If possible take a quick look at your data in ArcGIS and see if there are any feature classes available. The directory should have a gbd extension. The dbf files were likely a result of a summary, query or relate.
Aug
25
comment How to effectively read and analyze multiple dbf tables?
If the dbf files are supose to be spatial data, it is likely that they are shapefiles and have other associated files (eg, "shp", "shx", ...). You can read shapefiles using the readOGR function in the rgdal library. To read standalone dbf files you can use the foreign library but, unless there are coordinates stored as columns they are somewhat useless in a GIS application. ESRI file geodatabases and personal geodatabases do not utilize the dbf format. It would be helpful if you provided more information.
Aug
12
awarded  Revival
Aug
11
revised Integer vs Non-Integer LiDAR
added 556 characters in body
Aug
11
answered Integer vs Non-Integer LiDAR
Aug
11
awarded  Necromancer
Aug
10
answered Exporting Matrix from ArcGIS (so readable in R)
Aug
7
comment How to create an autocovariate in ArcGIS for use in autologistic regression model
You would need to write Python code to implement the autoregressive term. Why are you trying to do this in ArcGIS? I have a function in my R spatialEco package "logistic.regression" that allows one to specify the model as autologistic and automatically derives the autologistic term. The model is fit using a penalized maximum likelihood. Per Dormann 2007, it would be quite easy to wrap this function in an MCMC to produce a stable estimate given different realizations of the autocovariance across the parameter space.
Aug
6
revised Saving results in automap R package for time series data
added 593 characters in body
Aug
6
answered Saving results in automap R package for time series data