Updated structure of lecture plan and file names (needs to be double checked)

exercises/02450Toolbox_Matlab/Scripts/ex3_1_6.m

-%% exercise 2.1.6
+%% exercise 3.1.6
 mfig('NanoNose: Attribute standard deviations'); clf; hold all; 
 bar(1:size(X,2), std(X));
 xticks(1:size(X,2))

exercises/02450Toolbox_Matlab/Scripts/ex3_2_1.m

-%% exercise 2.2.1
+%% exercise 3.2.1
 
 % Digit number to display
 i = 1; 

exercises/02450Toolbox_Matlab/Scripts/ex3_2_2.m

-%% exercise 2.2.2
+%% exercise 3.2.2
 
 % Digits to include in analysis (to include all, n = 1:10);
 n = [0,1];

exercises/02450Toolbox_Matlab/Scripts/ex3_3_1.m

-%% exercise 2.3.1
+%% exercise 3.3.1
 %% Load data
 cdir = fileparts(mfilename('fullpath')); 
 load(fullfile(cdir,'../Data/zipdata.mat'));