What is wrong with my code

The error message shown is :

Operands to the and && operators must be convertible to logical scalar values.

Error in MainCode>cal_for_tune (line 412)

    %----------FIXING THE MAX TIP HEIGHT-----------------------------------------------

My code near that line :

line 411 % ----------------------------------------------------------------------------------

line 412 % ----------FIXING THE MAX TIP HEIGHT-----------------------------------------------

           line 413     if((TH_max1 >= 0.4) && (TH_max2 >= 0.4) && (TH_max3 >= 0.4))
                    BM_Lvr1_max_adj = lim_up_down(10*abs(TH_max1-0.4),0,3);
                    BM_Lvr2_max_adj = lim_up_down(10*abs((TH_max2+TH_max3)/2-0.4),0,3);

[Rahul agarwal]

the conditions you are checking in the Line 413 is not able to give logical scalar values, check the class of TH_max1, TH_max2, TH_max3. it should be array, not cell.

Answer 1

[Walter Roberson]

One of your TH_max* variables is empty or is not a scalar. When you use && then the results of each individual test must be a scalar.

Answer 2

[Jan Orwat]

Are TH_max1:3 scalars, vectors or arrays? && and may be used only with scalars. Try:

if(all(TH_max1(:) >= 0.4) && all(TH_max2(:) >= 0.4) && all(TH_max3(:) >= 0.4))