I cant solve this "Error using horzcat Dimensions of matrices being concatenated are not consistent." please help im new to MATLAB

Here is my code:

%This line of code will open a file dialog for image input%
clc;
close all;
[fname, path]= uigetfile ('.JPG','Open Image for training','Open Image file');
fname = strcat(path,fname);
im = imread(fname);
imshow(im);
title ('Input Image');
c = input ('Enter Class for this image(Enter number from 1 to 10)');
%%Feature Extraction
F = FeatureStatistical(im);

try
load db;
F = [F c];
db = [db;F];
save db.mat db 
catch
     db = [F c];  
   save db.mat db
end

If I try to run it I got this error:

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

Error in Module1_training (line 19)
     db = [F c];

I have 1x2x3 double for my F and 1 for c.

Please Help me.