錯誤：運算符*：不符合標準的參數（OP1是RXC，OP2是RXC）

Question

我已實現了以下功能來估算Parzen Density of a matrix，

parzen.m

function [retval] = parzen (matrix, dataPoint, variance) 
    [r c] = size(matrix); 
    A = ones(r, c)*dataPoint; 
    sub = matrix - A; 
    up = sub.^2; 
    dw = 2 * variance; 
    firstPart = 1/(sqrt(2*pi*variance)); 
    retval = firstPart * exp((-1)*(up/dw)); 

錯誤

>> parzen(train, test, 0.25) 
error: parzen: operator *: nonconformant arguments (op1 is 1824x8, op2 is 1824x8 
) 
error: called from 
    parzen at line 3 column 4 
>> 

我該如何擺脫這個錯誤？

Answer 1

從@Benoit_11紀念解決了我的問題。

A = ones(r,c) .* dataPoint.