Need help with Operands operators must be convertible to logical scalar values

Receving this error:

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

Error in DriverProgram (line 59)

if x2 >= 0 && x2 <= 8

{code}
if x2 >= 0 && x2 <= 8
   x2_double_prime = (w-d)/m;
else
   x2_double_prime= (w-d-b-r)/m;
end

Answer 1

[madhan ravi]

use & instead of &&

[Walter Roberson]

I think it is likely that you need to use logical indexing or a for loop.

[madhan ravi]

Thank you sir Walter completely agree with you

Answer 2

[Walter Roberson]

your x2 is not a scalar. You need to figure out whether it is an error in the code that permits the value to be empty or aa vector or array , or whatever you want the condition to trigger only if the condition is true for all of the values , or if you want the values to be examined individually .

If you want it to be true only if it is true for all values in x2 then change the && to & and consider using the all() function for clarity .

If you want the values to be examined individually then either use aa loop or else learn how to use logical indexing .