MATLAB: Inner matrix dimensions must agree

arrayfaqmatrixmatrix arrayvector

I wrote these codes, I splitted the dataset(colon attached) into two parts (data1 and data2) based on the last column(1 or else)and make the columns equal to each others.
clc;
clear;
close all;
tic
load colon.mat 
data=colon; 
[n,m]=size(data);
d=10;
l=1;
t=1;
data1=[];
data2=[];
for i=1:n
    if data(i,m)==1
        data1(l,:)=data(i,1:m-1);
        l=l+1;
    else
        data2(t,:)=data(i,1:m-1); 
        t=t+1;
    end
end
if t>l
    data1(l:t-1,1:m-1)=0;
else
    data2(t:l-1,1:m-1)=0;
end
 for i=1: m-1                      
    thisCol1=data1(:,i);      
    thisCol2=data2(:,i);
    a24(i)=fkumarjohnson(thisCol1,thisCol2);
     end
and then in for loop I computed the distance value between the data1 and data2 and for computation I defined a function fkumarjohnson (I attached the image of the formula)but I found the error.
function [ fkj ] = fkumarjohnson(p,q )
%UNTITLED Summary of this function goes here
%   Detailed explanation goes here
fkj=sum(((p*p-q*q).^2)/(2*(dot(p,q)).^(3/2)));
end
the error is:
Error using  * 
Inner matrix dimensions must agree.
Error in fkumarjohnson (line 4)
fkj=sum(((p*p-q*q).^2)/(2*(dot(p,q)).^(3/2)));
Error in myFSmethod (line 62)
  a24(i)=fkumarjohnson(thisCol1,thisCol2);
The matlab said the inner matrix dimensions of two sides of * must agree but I don't know how to make their dimensions equal.I'll be very gratefull to have your opinions. Thanks

Best Answer

fkj= sum(.5*((p.^2-q.^2).^2)./((p.*q).^1.5));
Note that .^ .* and ./ operators are used for element-wise operation (see also Stephen's comment).
Note also that dot can give apparently unexpected results for complex inputs (see dot help)
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