how can I read text file in matlab ?
in [Matlab]
|
From: dpb on 1 May 2010 15:05 roya olyazadeh wrote: > .... > I read your comments tnx. But I am not professional in MATLAB. I use > this : tline = fgetl(fid); > answer = findstr(tline,'END OF HEADER'); > if ~ischar(tline), break, end > to display my text after reading. I don't follow, but ok... > case A and D must be in separate array because I need to do computation > separately. But then you'll need some other place to store them besides the same array names used previously. > and after running I have d and a and c Are a and c and d matrix? Why > couldn't I use them like this?? degree=a(1,4) 'degree' is empty. > I tried to use textscan but where? D = textscan(d,'%d %d %f %f > %*[^\n]'); d is array from strvcat .... OK, this parses the two cases you gave answers for -- it's kinda' klunky because there isn't a convenient way to concatenate multiple arrays in a single statement and assuming the arrays aren't terribly huge and you don't have to do this a whole bunch of times I didn't preallocate arrays and index not having an a priori count of maximum size. x = []; a = x; b = x; d = x; % create some empty arrays while ~feof(fid) s=fgetl(fid); % get a line if isempty(s), continue, end % skip any empty lines switch upper(s(1)) % make it upper for single test case {'C'} x = [x; sscanf(s(2:end), '%*d%f%f)')']; case ('A') % don't have a rule for this case... case ('D') % read into temporary variable then concat into arrays... [r,s,t] = strread(s(2:end),'%d%d%f%*[^\n]') a = [a;r]; b = [b;s]; d = [d;t] otherwise disp(['Unknown case: ' s(1)]) end end I don't have a late enough version to debug us' anonymous functions version -- it'll undoubtedly be somewhat cleaner if you do. As for "being professional", it's "time in grade" -- if you're going to use Matlab, spend some time reading the "Getting Started" section. It will pay off in the longer run if your project is anything more than a day long effort... --
From: roya olyazadeh on 2 May 2010 09:47 > OK, this parses the two cases you gave answers for -- it's kinda' klunky > because there isn't a convenient way to concatenate multiple arrays in a > single statement and assuming the arrays aren't terribly huge and you > don't have to do this a whole bunch of times I didn't preallocate arrays > and index not having an a priori count of maximum size. > > x = []; a = x; b = x; d = x; % create some empty arrays > while ~feof(fid) > s=fgetl(fid); % get a line > if isempty(s), continue, end % skip any empty lines > switch upper(s(1)) % make it upper for single test > case {'C'} > x = [x; sscanf(s(2:end), '%*d%f%f)')']; > case ('A') > % don't have a rule for this case... > case ('D') > % read into temporary variable then concat into arrays... > [r,s,t] = strread(s(2:end),'%d%d%f%*[^\n]') > a = [a;r]; b = [b;s]; d = [d;t] > otherwise > disp(['Unknown case: ' s(1)]) > end > end > > I don't have a late enough version to debug us' anonymous functions > version -- it'll undoubtedly be somewhat cleaner if you do. > > As for "being professional", it's "time in grade" -- if you're going to > use Matlab, spend some time reading the "Getting Started" section. It > will pay off in the longer run if your project is anything more than a > day long effort... > > Now it works. Thank you very much . Now I am moving to next part of my project. tnx again clc filename=input('Input the filename:','s'); fid=fopen(filename); head_lines = 0; x = []; at = x; fr = x; tt = x; deg=x; min=x; sec=x; from=x; to=x; dist=x; var=x; var2=x; stn=x; y=x; fix1=x; fix2=x; i=0;j=0;h=0; while ~feof(fid) head_lines = head_lines+1; tline = fgetl(fid); answer = findstr(tline,'END OF HEADER'); if ~ischar(tline), break, end disp(tline) switch tline(1) case {'C' } [q,r,s,t,u] = strread(tline(2:end), '%d %f %f %s %s %*[^\n]'); stn=[stn;q]; x=[x;r]; y=[y,s]; fix1=[fix1;t]; fix2=[fix2;u]; i=i+1; case ('D') [m, n, o, p] = strread(tline(2:end),'%d %d %f %f %*[^\n]'); from = [from;m]; to = [to;n]; dist = [dist;o]; var = [var;p]; j=j+1; case ('A') [a, b, c,d,e,f,g] = strread(tline(2:end),'%d %d %d %f %f %f %f %*[^\n]'); at = [at;a]; fr = [fr;b]; tt = [tt;c]; deg = [deg;d]; min = [min;e];sec = [sec;f];var2 = [var2;g]; h=h+1; end end fclose(fid);
From: dpb on 2 May 2010 09:55 roya olyazadeh wrote: > >> OK, this parses the two cases you gave answers for -- .... >> Now it works. Thank you very much . > Now I am moving to next part of my project. tnx again .... > filename=input('Input the filename:','s'); .... doc uigetfile % and friends may be convenient here... --
From: roya olyazadeh on 3 May 2010 08:09 dpb <none(a)non.net> wrote in message <hrk0bn$qhp$1(a)news.eternal-september.org>... > roya olyazadeh wrote: > > > >> OK, this parses the two cases you gave answers for -- > ... > >> Now it works. Thank you very much . > > Now I am moving to next part of my project. tnx again > ... > > filename=input('Input the filename:','s'); > ... > > doc uigetfile % and friends may be convenient here... > > -- Hi I have another question.. Can you tell me how can I add string to a matrix. For this example I have this matrix : from=[1 ;2 ;4; 6; 7; 8 ] Now I want to add x to them so I have from=[x1;x2;x4;x6;x7;x8] tnx againt for your help.
From: us on 3 May 2010 08:26
"roya olyazadeh" > > This error occurred after running > > Too many inputs. > > Error in ==> secndcor at 13 > v=cellfun(@(x) sscanf(x,tmpl{i,3}),s(ix),'uni',false); > > and one thing , file size is changeable. sometimes maybe 100 lines . sometimes they > are not in order like this : > D 1 2 122.286 0.002 > A 1 2 5 35 17 32.00 3.0 > C 1 1000.000000 1000.000000 ! > D 1 3 190.522 0.002 > C 4 878.926000 1021.071000 ! ! > > What is the solution ? which ML version do you have(?)... can you upgrade(?)... note: the order of your character tags does not matter... us |