hello, i have such a type of data per 30 days in one file.by using fgets,fsca​nf,str2num​,strcmp i need to plot temp vs height

[Dyuman Joshi]

Use readtable to read the data into a table and use indexing to access and thus plot the data using plot

[Mr Thadi]

Mr, joshi thank you. I was done by using this command thats appreciable but I need by using commands with fscanf, fgets, str2num, strcmp

[Dyuman Joshi]

Any particular reason why you are constrained you use those functions only, when there are better, robust functions available?

[Mr Thadi]

yes,but i need solution in this way only

[Dyuman Joshi]

@Mr Thadi, did you check the answer posted below?

Answer 1

[Voss]

The following uses fscanf, fgets, str2num, and strcmp:

filename = 'file.txt';

fid = fopen(filename,'r');

counter = 0;
while counter < 2
    str = fgets(fid);
    if ~ischar(str)
        break
    end
    if numel(str) > 1 && strcmp(str([1 2]),'--')
        counter = counter + 1;
    end
end

data = str2num(fscanf(fid,'%c'));

fclose(fid);

plot(data(:,2),data(:,3))