How to read in data from file using specific lines?

Hi! I have a project dealing with plotting bezier curves from a data file. The first value of the data file (data.m) is the number of curves that will be plotted on the graph which I already coded. Then each set of lines correspond to the x and y values. I am trying to read this data into my program by calling out the odd lines for the x's and even lines for the y's. However it is not working and I didn't take into account the spaces. How can I be able to read in this data file into my program in order to sucessfully run in? I can easily hard code it but unfortunately cannot do that as when my program will be tested, the numbers of the file will be different.

data.m (NOTE: comments are not actually on the file! Just adding them to describe the values)

3 %number of curves

0 0 0 0 %x values
0 3 3 6 %y values

0 4 4 0 %x values
6 6 3 3 %y values

0 1.5 1.5 3 %x values
3 1.5 1.5 0 %y values

Answer 1

[DGM]

I'll leave the matter of how you choose to plot the data up to you, but this is one way to get the file read:

% open file and grab everything
fid = fopen('data.m','r'); %open file
lines=textscan(fid,'%s','Delimiter','\n');
fclose(fid); %close file

% get rid of blank lines and reformat for more convenient indexing
lines=lines{:}(~cellfun(@isempty,lines{:}))

numcurves=str2double(lines{1});
for c=1:numcurves
	% grab the vectors from the cell array
	thisx=str2num(lines{2+(c-1)*2});
	thisy=str2num(lines{3+(c-1)*2});
	
	% do stuff with these vectors
        % plot them, etc...
end

Something like that should work.