how to extract a specific text from text file

I extract this line from my file : {'1;158.798;281.117;99.858;39.855;2182;'} and Next step is to extract the second , third , fourth and fifth numbers like this : [158.798,281.117,99.858,39.855]

Any help please ?

[Stephen23]

@sofa BY: your example also incudes the fifth number. Is this correct?

[safa BY]

yes

Answer 1

[Stephen23]

>> C = {'1;158.798;281.117;99.858;39.855;2182;'};
>> D = regexp(C,';','split');
>> D{1}(2:5)
ans =
  '158.798'    '281.117'    '99.858'    '39.855'
>> str2double(D{1}(2:5)) % convert to numeric
ans =
   158.798   281.117    99.858    39.855

[safa BY]

I need the fifth number also please ! I m sorry

[Stephen23]

@safa BY: Done. Check my edited answer. Surely you could have changed that 4 to a 5 yourself!

[safa BY]

D{1}(2:5) It works for me now thank you I have an other question

[~, str]=system('tail -n 1 CC999-CORA-B04-192Data.csv')%

how can I change filename with a variable not a static filename like this ' CC999-CORA-B04-192Data.csv'

[Stephen23]

Use sprintf, e.g.:

fnm = 'CC999-CORA-B04-192Data.csv';
sprintf('tail -n 1 %s',fnm)

[safa BY]

Thank you so much !!!!!!!!!!!!!

[safa BY]

Hello again Stephen, Can you help me please , ? I need to add a header to my textfile and this is my code :

for k=1:nbrRect
    Cellule{k}=get(rectangles(k), 'Position');
    tag=  CellTag(k);
    x1 = Cellule{k}(1)+Cellule{k}(3)/2;
    y1 = Cellule{k}(2)+Cellule{k}(4)/2;
    fprintf(fileID,'%d;%5.3f;%5.3f;%5.3f;%5.3f;%d;%5.3f;%5.3f;\n',tag,Cellule{k}(1),Cellule{k}(2),Cellule{k}(3),Cellule{k}(4),numf,x1,y1);
end

I added this line before fopen and the boucle for but there is no header in my file:

fprintf(fileID,'%d;%5.3f;%5.3f;%5.3f;%5.3f;%d;;%5.3f;%5.3f;\n','Person ID','pos1','pos2','Width','height','X centre','Y centre');

[Stephen23]

"I added this line before fopen and the boucle for but there is no header in my file"

That line will need to go after fopen and before the loop. You will also need to change the all of the format specifiers to %s.