I want to use lookup table(LUT) with two entries i.e. m and error (with respect to m). Later, I want to fetch stored error from LUT by m values. Any one please suggest me ?

Two entries for lookup table are:

m = [0.01 0.1 0.2 0.5 1 2 5 10 100];

error = [0.1229 1.2106 2.3099 4.0651 0 -4.0651 -2.3099 -1.2106 -0.1229];

Later, i want to fetch error value with respect to m.

For example: for m=0.1, error(m)=1.2106.

Anyone please suggest me some idea??

Answer 1

[Seth Furman]

Consider dictionary.

https://www.mathworks.com/help/matlab/ref/dictionary.html

m = [0.01 0.1 0.2 0.5 1 2 5 10 100];
err = [0.1229 1.2106 2.3099 4.0651 0 -4.0651 -2.3099 -1.2106 -0.1229];
d = dictionary(m,err)

d = 
  dictionary (double ⟼ double) with 9 entries:

    0.0100 ⟼ 0.1229
    0.1000 ⟼ 1.2106
    0.2000 ⟼ 2.3099
    0.5000 ⟼ 4.0651
    1      ⟼ 0
    2      ⟼ -4.0651
    5      ⟼ -2.3099
    10     ⟼ -1.2106
    100    ⟼ -0.1229

d(.1)

ans = 1.2106