Ricardo Alvarez

12 Questions 21 Answers 0 Followers

Questions related from Ricardo Alvarez

How add latitude layer as a variable in SDM?

Hi everyone, I'm trying to add latitude as a variable in my marine mammal modelling approach and I have a doubt. Someone has included this variable? could explain me if your include as categorical...

07 November 2016 2,555 3 View

What's the useful of use D and/or I overlap test?

Dear all, I'm running the D and I overlap test metrics adapted for Warren, 2008 - 2010 in the ENMTools. According to Warren, D have ecological significance, while I test shows the comparison as a...

02 June 2016 5,365 1 View

Which approach is better to assess Niche overlap or breadth in Species Distribution Models?

Hi everyone, I run different SDM with BIOMOD2 package and Maxent. I get my results about the best models performances, AUC values, etc. Now I'm interesting to evaluate the levels of niche overlap...

12 May 2016 6,222 6 View

How to assign values to a cell in a Raster with ArcMap?

Hey guys, I 've obtained SST information from netcd files in raster format. Some Temperatire values were lost due to the raster transformation and I'd like to use the value from nearby cells to...

03 May 2016 2,147 5 View

How to fix problem with file projection of a raster file with Raster Package in R?

Hi Guys! I guess that honestly I get serious problems with the raster package in R and their projections tools. I got information about SST from Nectdf files in area along south america. I need...

28 April 2016 7,186 6 View

Does anyone know how to manage CTD data in *.csv files (R software)?

I got CTD files in csv format. When I try to read the data in oce R package the file extension show an error (unknown type file). Any comment or advice about it? any other R package to work these...

21 March 2016 357 4 View

How can I compare differences between models obtained from MaxEnt?

Hi Everyone, First of all I wanna acknowledge their responses to my previous questions. they have been so useful. I have my models in MaxEnt and then probably I'll run the same analysis in...

13 July 2015 5,586 13 View

Any suggestions about the Bias File in MaxEnt?

HI Everyone, I again asking about Maxent. Now I wanna ask you about your experience using Bias File. I'm using in to model the distributionof species, but the results are less significant without...

01 May 2015 3,959 2 View

How will resolution affect my analysis and how can I estimate the resolution of my analysis (Using MaxEnt)?

Hi guys, I have a new doubt with MaxEnt and it is refered to resolution (size grid). How resolution affect my analysis and How I estimate the resolution of my analysis? for example a continental,...

10 April 2015 2,620 3 View

Is it possible to add temporal layer to my Species Distribution Model (SDM)?

Hi guys, for example. I'm interesting to add a temperature layer to my model and I think to add a layer of average Temperature of the period of my data. Is it correct? if not, How could I done?

07 April 2015 8,487 7 View

In ecological term what is the difference to use: bootstrap, crossvalidation or subsample in MAXENT?

I'm running some model of SDM, but I'm not clear if there is ecological difference in data sample or data mining structure to use any of these variations. Cheers!!

27 March 2015 1,383 4 View

Can somebody help me with the below Maxent model problem?

HI Guys, I'm trying to run a maxent model with two kind of datasource. two layers are shp converted to raster and then to ascii file. another one is on tiff file converted to grid and then to...

23 March 2015 5,955 9 View