The given below i put 100%efforts but do not solve.so please help me. I prepocessed the three signals and added the nm2cm but do not pass the test cases.

Answer 1

[Image Analyst]

MATLAB is case sensitive. You created harp_Cm while it wanted harp_cm with a lower case c.

harp_cm = harp; % Duplicate harp and add lower case _cm to the name.

[CHEEPATI]

Thank you

Answer 2

[Walter Roberson]

You do not have a signal named harp_cm so it is not possible that you have plotted harp_cm