Undefined function or variable 'norm_relbow_motor1a'

I have been trying to use following functions but it comes up with error message.

duration =0.05; % 10ms for BAEP, 500ms for P300, 250ms for EEG, 50ms for SSEP 
samples = 640; %500  or 1000 samples (plus defined centrepoint) 
samplingInterval = duration/samples; 
bandwidth = 3e3;% 3kHz -BAEP & SSEP , 200Hz - EEG & P300, 

time = linspace (0, duration, samples); 
freq = linspace (-bandwidth, bandwidth, 640); 
% freq = linspace (-1.0e3, 1.0e3, 500);alternative baseline 
fourierSpace = fftshift(ifft(norm_relbow_motor1a)); 
plot (freq, abs(fourierSpace))

Undefined function or variable 'norm_relbow_motor1a'.

When I tried with F9 function Key it came up with following error message. Undefined function 'Undefined' for input arguments of type 'char'

Is anyone can who can help me in this regard? I will highly appreciate.

Regards

Kim

Answer 1

[Walter Roberson]

What are you expecting norm_relbow_motor1a to be? You do not define it, and it is not a Mathworks provided function, and it is not in the File Exchange, and in fact Google has never heard of it either.

Perhaps you assigned to a variable with that name in one part of your code but did not transfer the value to the other part of the code?

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

[Shah]

I am expecting to see my signal in frequency domain. The NCS (NERVE CONDUCTION STUDIES) signal was recorded in time domain. I was given those instructions to use in MATLAB.

[Walter Roberson]

We need to see your code.