Help on If loop

Hello, Im trying to evaluate and separete by categories a certain Variable (Acceleration) and dividing it by levels (0,1,2,3) depending on its value to therefor do a table with them, however my code isnt really working, only obtain 1 value, which 0, when im expecting to get a 621x1 array. Leve here my code, if anyone can help i would appreciate.

Thank you.

Acceleration_Value= abs(Acceleration);       % Obtaining absolute values for acceleration/deceleration
ds_mapping=[];
if 0.7 <= Acceleration_Value >= 2.79
    ds_mapping= 'Econimic (1)';
elseif 2.79 < Acceleration_Value >= 3.63
    ds_mapping= 'Normal (2)';
elseif 3.63 < Acceleration_Value >= 6.5
    ds_mapping= 'Agressive (3)';
else
    ds_mapping= 0
end
Table1= table(Acceleration_Value, ds_mapping)

Answer 1

[Walter Roberson]

In MATLAB,

if 0.7 <= Acceleration_Value >= 2.79

is considered to be

    if all((0.7 <= Acceleration_Value) >= 2.79)

The first part, (0.7 <= Acceleration_Value) returns 1 (true) for each element of Acceleration_Value that is greater than or equal to 0.7, and 0 for each element that is not. Then the 0 or 1 is compared to 2.79... and of course that will never be true.

Your use of table() suggests to me that your Acceleration is a vector rather than a scalar.

I would suggest you consider using discretize() with categorical

https://www.mathworks.com/help/matlab/ref/double.discretize.html#d122e315882

(and remember that table want column vectors not row vectors.)