Wrapper around GriddedInterpolant in Simulink

I need 4-D to 10-D LUTs in Simulink. The GriddedInterpolant object seems to be the right way to do it. Currently I do the following:

1. initialize the object:

F = griddedInterpolant({1:5,1:4,1:3,1:2},reshape((1:120),[5 4 3 2]),'linear','nearest');

2. use it inside an Intepreted MATLAB Fcn block by calling:

F(u(1),u(2),u(3),u(4))

I would like to wrap a masked subsystem around the Intepreted MATLAB Fcn so that it would simplify the configuration of such n-D LUT. Can anybody help with doing that?

Ideally, user would only specify the number of input signals, respective breakpoints, and the n-D surface. The subsystem would itself initialize the object, adjust number of its input ports and the F(..) command of the Interpreted MATLAB Fcn.

I do not insist on the Interpreted MATLAB Fcn block - I would be glad to learn an even faster way to do that.

Many thanks, Ondrej

Answer 1

[Sean de Wolski]

Any reason why you don't want to use the nd-lookup table block in Simulink?

http://www.mathworks.com/help/releases/R2013b/simulink/slref/ndlookuptable.html

[Ondrej Holub]

Oops, I was too shy to type in the pop-up of the N-D LUT block. According to the error message, it can handle up to 30 dimensions... Many thanks!