??? Undefined function or method 'isnan' for input arguments of type 'struct'.

I am trying to use downloaded code.(GGcall)

clear all
close all
colors={'r.' 'gx' 'b+' 'ys' 'md' 'cv' 'k.' 'r*' 'g*' 'b*' 'y*' 'm*' 'c*' 'k*' };

%the data
data.X=load('a.dat');

%normalization
data=clust_normalize(data,'range');

%parameters
param.c=8;
param.m=2;
param.e=1e-3;
param.val=1;
param.vis=0;

%Gath-Geva clustering
result = kmeans(data,param);
param.c=result.data.f;
result = GGclust(data,param);

%validation
result = validity(result,data,param);
plot(data.X(:,1),data.X(:,2),'b.',result.cluster.v(:,1),result.cluster.v(:,2),'ro');
hold on
plot(result.cluster.v(:,1),result.cluster.v(:,2),'ro');

%evaluation
new.X=data.X;
eval = clusteval(new,result,param);
result.validity

SO I got this: ??? Undefined function or method 'isnan' for input arguments of type 'struct'.

Error in ==> statremovenan at 29
     wasnan = wasnan | any(isnan(y),2);

Error in ==> kmeans at 125
[ignore,wasnan,X] = statremovenan(X);

Error in ==> GGcall at 19
result = kmeans(data,param);

But the problem is that I could not find these lines neither in GGcall neither in any other programs it calls. By the way kmeans has 82 lines!

Answer 1

[Vishal Rane]

The function stack is as follows:

GGcall > kmeans > statremovenan

The command

wasnan = wasnan | any(isnan(y),2);

at line 29 of the function statremovenan is causing the error.

The variable y is probably a structure type, causing the function isnan to fail since it does not operate on structs.