Lookup Table for Multi Variable Implicit Function or MATLAB Function
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In order to call the precalculated values of a multi-variable function can I use the Simulink n-D Lookup Table or is there a MATLAB function to do that? In part of my script I need to access an output of the function F(x,y,z)-unknown function- knowing the values for x,y,z. My cell arrays look like this:
x y z F
7 3 15 0.003
8 4 19 0.04
7 5 12 0.09
.
.
.
So I have the values for x,y,z and F columns independently. I know I can write an IF statement for x=x0,y=y0,z=z0 and find the row index and F but I am trying to use a faster way without having to go to through for/if loops. speed is an issue. Is there a MATLAB function for that? Thanks
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Sean de Wolski
2014-8-5
Sounds like a use for scattered or gridded interpolants:
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Sean de Wolski
2014-8-5
Oh. Then use ismember with the 'rows'__ option
x = [1 2; 3 4; 5 6]
idx = ismember(x,[3 4],'rows')
F(idx)
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