Mapping non-integer values of matrix to another matrix via mapping table

Dear all,

I would like to do a mapping operation as in this thread, only with real numbers and not integers. To illustrate, suppose I have the vector

v=[0.5 1.3 0.7 3 0.7 1.3];

as well as a mapping table

m=[0.5 4; 0.7 5; 1.3 6; 3 7]

m = 4×2

0.5000 4.0000 0.7000 5.0000 1.3000 6.0000 3.0000 7.0000

I would like to transform v via mapping m into

w=[4 6 5 7 5 6];

if possible without using a loop. Does anyone have an idea? Thanks a lot in advance for your time!

Answer 1

[KSSV]

v=[0.5 1.3 0.7 3 0.7 1.3];
m=[0.5 4; 0.7 5; 1.3 6; 3 7] ;
w=[4 6 5 7 5 6];

[c,ia] = ismember(v,m(:,1)) ;
iwant = m(ia,2)

[Walter Roberson]

I would suggest ismembertol for this purpose

[Distelfink]

Thanks to both of you for the helpful answers!