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function [result] = tsgEvaluate(lGrid, mX)
%
% [result] = tsgEvaluate(lGrid, points)
%
% evaluates the intepolant at the points of interest and returns the result
% this should be called after the grid has been created and after values
% have been loaded
%
% INPUT:
%
% lGrid: a grid list created by tsgMakeXXX(...)
%
% mX: an array of size [num_x, dimensions]
% specifies the points where the interpolant should be evaluated
% Note: do not confuse points here with the nodes of the grid
% here points are user specified points to evaluate the
% interpolant (or approximation)
%
% NOTE: if lGrid has a field gpuDevice and if Tasmanian is build with
% CUBLAS or CUDA options, then this will attempt to use the GPU
% for acceleration. The gpuDevice should be an integer corresponding
% to a valid Nvidia CUDA device, run tsgCoreTests() to see the
% device list visible to Tasmanian and the corresponding number
%
% OUTPUT:
%
% result: an array of size [num_x, iOut]
% the values of the interpolant at the corresponding points
%
[sFiles, sTasGrid] = tsgGetPaths();
[sFileG, sFileX, sFileV, sFileO, sFileW, sFileC] = tsgMakeFilenames(lGrid);
sCommand = [sTasGrid,' -evaluate'];
sCommand = [sCommand, ' -gridfile ', sFileG];
tsgWriteMatrix(sFileX, mX);
sCommand = [sCommand, ' -xf ', sFileX];
lClean.sFileX = 1;
sCommand = [sCommand, ' -of ', sFileO];
lClean.sFileO = 1;
if (isfield(lGrid, 'gpuDevice'))
sCommand = [sCommand, ' -gpuid ', num2str(lGrid.gpuDevice)];
end
[status, cmdout] = system(sCommand);
if (max(size(strfind(cmdout, 'ERROR'))) ~= 0)
disp(cmdout);
error('The tasgrid execurable returned an error, see above');
return;
else
if (~ isempty(cmdout))
fprintf(1, ['Warning: Command had non-empty output:\n']);
disp(cmdout);
end
[result] = tsgReadMatrix(sFileO);
end
tsgCleanTempFiles(lGrid, lClean);
end
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