Load concatenated .mat files in a for loop

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Hello all.
I have this code. The problem is that, when I have 11 files, the for loop takes the file "spike 11.mat" before the file "spike 2.mat". In other word, the first file loaded is "spike 1.mat", then "spike 11.mat", and finally "spike 2.mat".
How can I tell the loop to take the first file, the second file, and so on?
Here is the for loop:
clear all, clc
% Specify the folder where the files live.
myFolder = 'C:\Users\usuario\Desktop\Lab\Amp_scripts\Spikes not analyzed\B2310\B2310\Exported_ROI_Second third_B2310.mat';
% Get a list of all files in the folder with the desired file name pattern.
filePattern = fullfile(myFolder, 'Spike No*.mat'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
for k = 1 : length(theFiles)
baseFileName = theFiles(k).name;
fullFileName = fullfile(myFolder, baseFileName);
fprintf(1, 'Now reading %s\n', baseFileName)
%Call the function Spike_analysis
Stephen23 on 20 Jan 2020
"The function dir usually returns the matches in alphanumerical order ..."
In fact no OS the MATLAB currently operates on takes into account the numeric values when returning the folder contents to DIR. On Windows the names are usually sorted into character (aka "asciibetical") order. Read these to know more:

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Accepted Answer

Jose Rego Terol
Jose Rego Terol on 19 Jan 2020
Hi Kevin,
"pad the filenames with 0's programatically and re-sort. "
I tried this option "Spike Nr_01, Spike Nr_02 ... Spike Nr_010" and the loop is stil taking the spike 11 before de second one.
Rename the files manually is just unacceptable. I have 60 spikes, so six times this error.
Can I change the order of function dir? I've checked the mathlab page and there is nothing about it.
woahs on 21 Jan 2020
Agreed. I just tend to protect for different fullpaths but in this case, I don't see it being a problem to omit the file path unless you need to sort a set of filenames stored in different folders.

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