The fish senses this difference from the usual current distribution, and infers the presence and location of the object. If an object is nearby which has different electrical conductivity from the surrounding water, the current distribution is disturbed on the skin of the fish. This fish senses its environment by producing a sinusoidal voltage difference between its body and tail sections, causing anĮlectric field and a current distribution in the surrounding 2012.We present a simulation of the electrosensory input of the weakly electric fish Apteronotus leptorhynchus. Values of input variables in the analysis of output from a computer code,Ĭhalom, A. A comparison of three methods for selecting Uses internal code originally published on package sensitivity, by Gilles Pujol, Bertrand Iooss, Alexandre Janon Modifies the object passed as argument as a side effect. NOTE: the tell method from sensitivity objects (like 'fast99') For help on the other methods, see the help Not used by the end-user for a simple R model, but rather for anĮxternal computational code. Simulations and sensitivity measures estimations in the package Tell and ask are S3 generic methods for decoupling The method tell allows to pass the simulation Hypercube samples, and allowing the user to run the simulation Model=NULL), it generates an incomplete object storing the Latin When the LHS function is called with no model (i.e., with argument Partial rank correlation coefficients are estimated using code based on the prcc Is set to more than one, the model will be run several times for each data point. The specified model is run with the data from the LHS. To the prescribed by the option COR (see the arguments for description). Huntington & Lyrintzis method for correcting the correlation matrix to be similar The following methods are currently supported for generating the LHS: random LHS and For "tell", an incomplete LHS object (created with model=NULL)Ī ame containing the model responsesĪ Latin Hypercube of size N is generated from the desired quantile distribution functions See the help on clusterExport on package parallel forĪn LHS/PLUE object. NOTE: You should manually export ALL objects required for the model to run, including the modelįunction itself. No load balancing is provided, so the model results are If a cluster is provided, the model will be run in parallel or distributed across See the vignette onĬluster generated with the “parallel” library. The number of model repetitions to be run for a single data point. Number of bootstrap replicates for calculating the PRCC. ‘maxIt’ The maximum number of iterations to be run for each factor. ‘eps’ The tolerance between the prescribed correlation and the actual correlation present in the Generate a zero-correlation Latin Hypercube. ‘COR’ The desired correlation matrix between the model variables. The method HL supports the following options: "HL" (the default) generates a random LH, and subsequently corrects the correlation matrixįurther options for the method used. "random" generates a simple LH, with no modifications. Optional: what are the names of the model results? (Used mainly for plotting)Ĭurrently, two methods are supported. If unsupplied,ĭefault values for the parameters are used. Specified by a named list, containing all of the arguments for the quantile distribution. If only one is provided, it will be used for all parameters.Ī list containing the arguments for the 'q' functions. The size of the hypercube, i.e., how many samples are generated. The names of the input variables (used for naming the 'data' ame and in plotting)Įither a vector of strings or a single number representing the number of factors If NULL, no function is run and the object generated is incomplete, see also the tell method. The function to be run, representing the model or simulation. ) # S3 method for class 'LHS' tell ( x, y, res.names = NULL, nboot = 0. LHS ( model = NULL, factors, N, q = NULL, q.arg = NULL, res.names = NULL, method = c ( "HL", "random" ), opts = list (), nboot = 0, repetitions = 1, cl = NULL ) # S3 method for class 'LHS' print ( x.
0 Comments
Leave a Reply. |