MATLAB: Limiting Precision on MATLAB

precisionradians

I have a condition for a switch statement. For example:
% Program variables and input prompts
runProgram = 1;
i = 1;
prompt_massRatio = 'Enter m/M Ratio: ';
prompt_Us = 'Enter Static friction: ';
prompt_Uk = 'Enter kinetic friction: ';
prompt_theta = 'Enter block angle: ';
% Graph variables F vs. m/M
Fplot = [];
massFraction = [];
% Program start
while runProgram == 1
    % Calculation Variables
    m_M = input(prompt_massRatio);
    angle = input(prompt_theta);
    theta = angle*(pi/180);
    Us = input(prompt_Us);
    Uk = input(prompt_Uk);
    g = 9.81;
    T = m_M*g;
    W = g*sin(theta);
    Fs = cos(theta)*g*Us;
    Fk = cos(theta)*g*Uk;
      % Conditions
      forceSum = T - W;
      switch (true)
        case (forceSum < 0)
In this case, when forceSum is calculated for the conditions of m_M = 0.5, angle = 30, we get a value that is essentially zero but MATLAB does not read it as zero for the case statement. I.E. forceSum returns 8.8818e-016.
Any idea of making MATLAB read this value as 0?
Thanks for any help.

Best Answer

Could try forceSum=int32(T-W)
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