undefined function 'a' in kmeans segmentation.How can i correct this?

while i run the code for kmeans segmentation,i am getting an erron in line 2 of one code and a function error in the other.How to correct this?

[KSSV]

Whic code shows error? What inputs you gave?

i am getting an erron in line 2 of one code : What is the error?

function error : what function error?

How do you expect us to help you with this vague information?

[Sri Vasudha Bankupalle]

for the first code kmns_seg_R.m when i run the code,its showing an error like 'undefined function a'

for the second code kmns_seg_W.m its showing an error like this

'undefined function or variable 'cen' and also an error in line 2

i have attached the files.Kindly refer

[Image Analyst]

How did you call it? What did you pass in for the badly-named a? For example did you call it like this:

[s1, n_RBC]=kmns_seg_R(73);  % Pass in 73 for a

or did you use a different value? You didn't just click the green run triangle without defining a did you?

[Sri Vasudha Bankupalle]

i guess there should be a main function to run this code..how to create it?