MATLAB: How to use switch case function to get decimal numbers

MATLABswitch case

M% Temperatur_C = [13,6169 14,5432 15,2356 17,2456 18,1887 19.9874 21,2765]
% Coeff            -30C   -20   -10   0    10     20   30    40    50 
% nT                1.8   1.8   1.4   1.1  1.1    1    0.9   0.9   0.8
             for A=1:(a-1)
             switch (Temperatur_C(1,A))
             case num2cell(-10.0:0)
             disp('nT=1.4')
             nT_NO(1,A) = 1.4;
             case num2cell(0.1:4.99)
             disp('nT=1.1')
             nT_NO(1,A) = 1.1;
             end
             
             
             If I use round command I get the answer but that's not right for me because I want to be able to get the specific temperature not rounded.For example if the temp is 18,1887 it gets it as 20.
             
             for A=1:(a-1)
             switch round(Temperatur_C(1,A))
             case num2cell(-10.0:0)
             disp('nT=1.4')
             nT_NO(1,A) = 1.4;
             case num2cell(0.1:4.99)
             disp('nT=1.1')
             nT_NO(1,A) = 1.1;
             end

Best Answer

I'm curious if you understand what that num2cell(-10.0:0) actually do in the case statement? If you don't and it's something you've been given by someone else don't use it.
It's not clear exactly what you're trying to do. I suspect it is this (minus the disps which are a bit pointless):
Breakpoints = [-Inf -30  -10  0    20  30   50 +Inf];
nT_Values =   [NaN  1.8  1.4  1.1  1   0.9  0.8];
whichcolumn = discretize(Temperatur_C, Breakpoints);
nT_NO = nT_Values(whichcolumn);
%and if you want the equivalent to disp:
%celldisp(compose('nT=%g', nT_NO));
You can't do what you were trying to do with switch statements, you could do it with if...elseif
for idx = 1:numel(Temperature_C)
    if Temperatur_C(idx) >= -30 & Temperatur_C(idx) < -10
        nT_NO(idx) = 1.4;
    elseif Temperatur_C(idx) >= -10 & Temperatur_C(idx) < 0
        nT_NO(idx) = 1.1;
    elseif ...etc
    end
end
As you can see, using discretize is much simpler.
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