Error using horzcat Dimensions of matrices being concatenated are not consistent.

I want to parse another another value say hsv in featurestatistical fuction but this is showing the above error. Anyone who can help me to resolve this. I'll be thankfull.

Training code

 clc;
clear all;
close all;
% Taking an Image
[fname, path]=uigetfile('.png','Open an Image as input for training');
fname=strcat(path, fname);
im=imread(fname);
imshow(im);
title('Input Image');
imgray=rgb2gray(im);
imshow(imgray);
hsv=rgb2hsv(im);
imshow(hsv);
title('HSV Image');
c=input('Enter the Class(Number from 1-12)');





*Fuction code*


function [F]=FeatureStatistical(im)
% Summary of this function goes here
im=double(im);
m=mean(mean(im));
s=std(std(im));
hsv=rgb2hsv(im);
F=[m s hsv];
end

Answer 1

[Stephan]

Do the following (i did for an example image on my computer):

im = imread('*:\***\***\****.PNG');
im=double(im);
m=mean(mean(im));
s=std(std(im));
hsv=rgb2hsv(im);
imshow(hsv)
F=[m s];

Then this in command line:

>> whos m s hsv

results in something like:

  Name        Size                 Bytes  Class     Attributes

  hsv       561x597x3            8038008  double              
  m           1x1x3                   24  double              
  s           1x1x3                   24  double

Now:

>> F = [m s]

F(:,:,1) =

  245.0794   14.4569


F(:,:,2) =

  245.0877   14.4241


F(:,:,3) =

  242.5142   18.1642 

which means

>> whos F
  Name      Size             Bytes  Class     Attributes

  F         1x2x3               48  double 

You can not add hsv to this array, because its dimension are incompatible:

>> F = [F hsv]
Error using horzcat
Dimensions of arrays being concatenated are not consistent.
 
>> whos F hsv
  Name        Size                 Bytes  Class     Attributes

  F           1x2x3                   48  double              
  hsv       561x597x3            8038008  double