Problem with reading text file and making changes

I have a file in a txt format with the following data

0  584547.75  4052042.76
1  584543.25  4052030.13
2  584542.06  4052009.10
3  584556.55  4052005.46
4  584565.18  4052000.66
5  584576.33  4051992.03
6  584594.05  4051981.91
7  584599.05  4051986.77
8  584609.27  4052003.61
9  584604.24  4052007.05
10  584603.98  4052020.41
11  584602.32  4052021.53
12  584605.89  4052029.20
13  584601.43  4052036.84
14  584597.00  4052041.34
15  584584.83  4052048.62
16  584576.23  4052056.49
17  584569.15  4052051.59
18  584555.92  4052047.8

I want to know through which commands, it can be openned, so as to abolish the first row and so as for a comma to be put between the second and the third column. I started with the following code:

fileID = fopen(C:\Users\GB\Desktop\topo);

c = textscan(fileID,'%f %f %f')

Answer 1

[GEORGIOS BEKAS]

I have found the answer:

M = dlmread('C:\Users\G\Desktop\topo.txt','  '); %replace path as appropriate 
M(:,1) = []
dlmwrite('C:\Users\G\Desktop\myfile.txt',M,',')

[Guillaume]

"I have found the answer"

... to a different question than you asked. The above will put a comma between all the columns not just "between the second and the third column" as you asked.

Answer 2

[Guillaume]

If I understood correctly:

filecontent = fileread('C:\somewhere\somefile.txt'); %replace path as appropriate
filecontent = regexprep(filecontent, '.*[\n\r]+', '', 'once', 'dotexceptnewline');   %remove first line
filecontent = regexprep(filecontent, '(\s+)([0-9.]+\r?)$', ',$2', 'lineanchors'); %replace whitespaces by , before last column
fid = fopen('C:\somewhere\newfile.txt', 'w');  %replace path as appropriate
assert(fid > 0, 'failed to open file for writing');
fwrite(fid, filecontent);
fclose(fid);