MATLAB: Extract Text From Nastran f06 file

read texttext extraction

Hi all,
I am looking to extract specific data from a Nastran f06 file (it opens as a text file in Notepad++).
What I want to do:
1- Locate the title "MODAL PARTICIPATION FACTORS" (here in the example it is at lign 37, but will vary depending on the analysis… therefore why I want to locate the title).
2- Locate the end of the table. It ends with a blank entry followed by a "Total" header. (here in the example at lign 254)
3- Extract all the data into one matrix. It starts 5 entry lines after the "Participation Factors" title, this is a fixed feature in all .f06 analysis. So here it would be a 211×8 type of matrix. The columns being "Mode N°" "Frequency" "T1" .. to .."R3"
Would you guys have any idea how to do this? Thanks in advance. I attach the file to this post.
Nicolas

Best Answer

fid = fopen('NASTRAN_file.txt') ;
S = textscan(fid,'%s','delimiter','\n') ;
S = S{1} ; 
fclose(fid) ;
str1 = 'MODAL PARTICIPATION FACTORS' ; 
str2 = 'TOTAL' ;
idx1 = find(contains(S,str1)) 
idx2 = find(contains(S,str2))
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