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Hi all, ?I'm trying to iterate in a SpatialPolygonDataFrame thatcontains 110 features. I tried to use the following code? iterate.spdf =function(x){ for (i in 1:nrow(x)){ p = x[i, ]} return(p)} but with no success as...

Hi friends, I have a xyz vector file from a terrestrial laser scanner that contains a huge amount of points at a high resolution (approximately 15 mm). I need to reduce the amount of point in the file by selecting...

Hi all,I'm trying to build a SpatialLines object from a list that contains 124 river segments. Each segment in the list contains the x,y coordinates. I'm using the following code to create the SpatialLines object, but...

Hi, I'm trying to apply a conditional statement to three raster layers using the following function: Con = function (condition, trueValue, falseValue){ return(condition*trueValue + (!condition)*falseValue) } A priori I've generated an empty matrix (r4) that match the other...

Hi all, I have some concerns regarding the rasterize option in R and I would like to know if the fun=max in rasterize in R provides similar results to the one achieved by using "Polygon to Raster using maximum...

Hi all, I have some concerns regarding the rasterize option in R and I would like to know if the fun=max in rasterize in R provides similar results to the one achieved by using "Polygon to Raster using maximum...

Dear Robert,?Thanks a lot. This code really works in a nice and simple way.Ashraf, cheers El Martes 13 de octubre de 2015 19:53, Robert J. Hijmans <r.hijmans at gmail.com> escribi?: Ashraf, Here is an approach...

Hi Eric, Thanks for the help.But this will not solve the problem as it will generate a list and what I need is an object of class sp using SpatialLine function from sp package.So, I need to convert...

Thanks John, Sorry for the confusing, but yes r4 is an empty raster and not an empty matrix. Indeed yes, it works with the raster directly without moving the raster layers to a matrix format. My error was not assigning...