read file with text and numericals

I have a file as follows

it contains 3 text lines at starting, data with 2 columns for every 3 lines which have 5 columns in each line.

How to read it in matlab?

example:

# this is line 1
# this is line 2
#this is line 3
10 25
1 14.34 25.98 576.6779 34.79080 
2 78.90 45.980 345.980 4534.809
3 70.39 234.32 34.456 456.00
20 25
1 31.6626 16.4479 6.9191 55.0296
2 149.629 105.448 231.137 486.214
3 0.000261389 44.6379 271.636 316.274
30 25
1 35.3791 12.0603 6.48611 53.9255
2 146.574 111.14 248.954 506.668
3 1.1585 64.3987 348.685 414.242

I need to separate line with 2 columns and lines with 5 columns

Answer 1

[Johannes Neumann]

Use textscan()

See e.g.:https://de.mathworks.com/matlabcentral/answers/160022-textscan-with-blocks-of-data-with-headers-to-individual-block

[Walter Roberson]

In particular, fopen() . fread() 3 lines and discard them. Then loop while ~feof()

cell2mat(textscan(fid, '%f%f', 1)) %to get the pair of numbers

cell2mat(textscan(fid, '%f%f%f%f%f', 3)) %to read the 5 columns

end of loop

each round storing the data somewhere appropriate

Though for your purposes, it might be easier to just loop using fscanf() as appropriate