How to create a 2D lookUp table in matlab
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I want to create a 2D look Up table from 3 arrays
x1= 0:0.1:1 %axis values --> length is 11
x2= 25:2:35 %axis values --> length is 6
y= 0.01:0.001:0.06 % output data --> length is 51, rest of the 15 elements are zeros
I want to create an LUT which has 6 rows and 11 columns. Whenever I need to retrieve y, if exact query points of x1 and x2 is not present, then the function should give an interpolated value. I want to generate a .m script for this without using Simulink.
Anyone please help me with this.
Stephen23 on 2 Aug 2016
You could use interp2 or interpn:
>> x1 = 0:0.1:1;
>> x2 = 25:2:35;
>> y = 0.01:0.001:0.06;
>> vm = zeros(numel(x1),numel(x2));
>> vm(1:numel(y)) = y;
ans = 0.010000
Note that this allocates the values of y row-wise into mat. If you want them to be allocated column-wise then transpose mat before and after the allocation.