R raster package: memory shortage when using “getValuesFocal” function -

-

With 3 layers, I would like to calculate the focal length for raster (1300 cells by 1400 cells) and I use the data from all 3 layers.

. For example, one of the layers is a land cover map and I would like to use only in pixels calculation in the focal window, whose equal land cover type is in the form of central pixels of the window. I think this is not possible with the "focal" function in the raster package, so I tried to extract the data from the 3 layers for the limit of each moving window by "getValuesFocal" after doing this, after considering the result of "getValuesFocal" array The lines were of loop though the array is too large and is not fit in memory so I get an error message: 

  dataraster & lt; - Stack (classification, layer 2, layer 3) data & lt; - getValuesFocal (dataraster, ngb = 11, name = TRUE, padValue = NA, array = TRUE) Error: Can not allocate vector vectors 1.7 GB Additionally: Warning message: 1: `rownames & lt; (`* Tmp *`, value = 1: 1879200): Access to total allocation of 8008 MB: see help (memory facility)  Large datasets like FF and large memory are allowed but my dataset is allowed Can not initially be done. was made. I am using 64-bit R and 8 GB RAM. Is there a way to write the result of "getValuesFocal" in the file? I am grateful for any help for reading data using  line  and    
 
 
 Nrows  for example logic 
 
  library (raster) R & lt; - Raster (NR = 5, NC = 5, CRS = '+ ProZ = UTM + region = 12') R [] & lt; - 1: 25 as.matrix (r) getValuesFocal (r, line = 1, nrows = 2, ngb = 3, names = TRUE)

Comments

Post a Comment

Popular posts from this blog

winforms - C# Form - Property Change -

-
I have a form that has a property named car A class with many properties. The Properties is being displayed on the current car on the basis of some user actions that are being displayed. So I have to know whether the property has been allocated or set to zero. I'm aware of INotifyPropertyChanged , but in my case I'm not sure that since this change I have changed my car properties car do not want to monitor the property. Any idea how to accomplish this? In advance thank you If you have created a true asset in your class then You should be a great and setter, you can add the code directly to the form property in order to take action on the basis of "form": Public partial category Form 1: form {public form 1 () {InitializeComponent (); } // define car square public class car {public string name = string. Empty; } // private car to keep the value of the current car private variable _car = null; // Property of public form which you can ru...
Read more

javascript - amcharts makechart not working -

-
I am trying to create an amiratars serial chart on my Durandal single page application. This chart was working fine on Chrome browser but it is not working on IE. Can you please help me in this regard. Error while using Amcharts. The Macchart () method does not support the object in this object in IE.
Read more

java - Algorithm negotiation fail SSH in Jenkins -

-
I am trying to do SSH on the local server from Jenkins, but the following error has been thrown: [SSH] Exception: Algorithm negotiation fail com.jcraft.jsch.JSchException: algorithm talk com.jcraft.jsch.Session.receive_kexinit (Session.javaatar20) at com.jcraft.jsch.Session.connect (Sesson at com.jcraft.jsch.Session.connect (Session.java:150) at org.jvnet.hudson.plugins.SSHSite.createSession (SSHSite.java:141) on failed failed org.jvnet.hudson.plugins. java: 286) .SSHS on org.jvnet.hudson.plugins.SSHBuildWrapper.executePreBuildScript (SSHBuildWrapper.java:75) on Org.jvnet.hudson.plugins.SSHBuildWrapper.setUp (SSHBuildWrapper.java59) ite.executeCommand (SSHSite.java151) on hudson.model.Build $ BuildExecution.doRun hudson.model.AbstractBuild $ AbstractBuildExecution.run (AbstractBuild.java:533) to (Build.java:154) hudson.model.Run.execute ( Run.java:1754) in ended .model.FreeStyleBuild.run (FreeStyl hudson.model.ResourceController.execute (ResourceController.java:89) on hudson.mod...
Read more