How can I add a set of 500 datas to workspace and plot them?

I have never used matlab. I have a set of 500 .ascii extensioned files. I open them in current folder. I click one of them and while holding it, I carry it to the workspace window. (this bring import wizard screen-I click next) I right click on the yellow colored ascii data on the workplace and plot it. then I need to save each of these plotted image in jpeg fomat. this needs to be done for each 500 items, I guess I need a script for this. but I dont know how to do it. Can someone help me please ?

Answer 1

[dpb]

Start with the FAQ at

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

I strongly recommend using the dir solution to process the files returned.

Something like the following should be a rough starting point...

d=dir('*.ascii');  % the directory list of files--salt wildcard/extension to suit
for i=1:length(d)
  data=textread(d.name(i));      % read a file
  plot(data(:,1),data(:,2));     % plot 2nd column vs first
  [~,name]=fileparts(d.name(i)); % get the root name of the file
  print -djpeg name              % write to name[.jpg]
  close 1                        % close that figure
end

[Ferda]

thanks a million :) with couple of changes it worked for me. I did it like this:

d=dir('*.ascii');  
for i=1:length(d)
  data=textread(d(i).name,'%d');    % read a file
  plot(data,'DisplayName','data','YDataSource','data');figure(gcf)
  [~,name]=fileparts(d(i).name);    % get the root name of the file
  print ('-djpeg', name)            % write to name[.jpg]
  close 1                           % close that figure
end

now I need to zoom in to the plotted images and save the zoomed file. how can I do this ?