Pyth. theorem script. Complex numbers exclusion. For the Type==1 when real part is positive the exclusion does not work. Any ideas why? Any idea also for characters exclusion?

clc, clear all
Type = input("Give 1 for Hypotenuse or 2 for Vertical : "); % Asking user for Hypotenuse or Vertical

Unable to run the 'fevalJSON' function because it calls the 'input' function, which is not supported for this product offering.

if Type == 1 %User wants to find hypotenuse
sides = input("Give [side1 side2] = ");

    if sides(1,1)>0 && sides(1,2)>0
            Hyp = sqrt(sides(1,1)^2 + sides(1,2)^2) %Calculation of the hypotenuse if both sides are given positive
           
    elseif sides(1,1)<0 || sides(1,2)<0 || sides(1,1) == complex(sides(1,1)) || sides(1,2) == complex(sides(1,2))
            disp('Negative or complex values for lengths are not allowed!!') %Displays that the sides cannot be negative neither complex numbers
            
    elseif sides(1,1) == 0 && sides(1,2) == 0
            Hyp = sqrt(sides(1,1)^2 + sides(1,2)^2)
            disp('The triangle became a single point') %Displays what happens when both vertical sides are zero
     
    else
            Hyp = sqrt(sides(1,1)^2 + sides(1,2)^2)
            disp('The triangle became a straight line') %Displays what happens when only one vertical side is zero
    end
    
elseif Type == 2 %User wants to find a vertical side
    sides = input("Give [Hyp side] = ");
  
    if sides(1,1)<0 || sides(1,2)<0 || sides(1,1) == complex(sides(1,1)) || sides(1,2) == complex(sides(1,2))
            disp('WARNING! Negative or complex values for lengths are not allowed!!') %Displays that the sides cannot be negative neither complex numbers
    
    elseif sides(1,1) == 0 && sides(1,2) == 0
            Vert = sqrt(sides(1,1)^2 - sides(1,2)^2)
            disp('The triangle became a single point') %Displays what happens when both Hyp and vertical are zero
        
    elseif sides(1,1)>0 && sides(1,2)>0 && sides(1,1)>sides(1,2)
            Vert = sqrt(sides(1,1)^2 - sides(1,2)^2) %Calculation of the vertical side when the sides are both positive and the hypotenuse is greater than the vertical
    
    else
        disp('Hyp must be GREATER than the given side') %Displays what happens when Hyp is less than the vertical side
    end
else
    disp('Wrong Input') %Displays what happens when the user enters a number different than 1 or 2
    %pyth
end

Answer 1

[Walter Roberson]

When you use the < <= > >= then matlab only compares real parts.

You should first test if any(imag(sides)) then there is a complex component

[Left Terry]

That was helpful. Thank you very much, I solved the problem. I have to exclude also characters using ischar() but it seems that it doesn't work like any().