linspace in trouble for axe modification

Hi!

I'm trying to pass values from a figure to another, in order to modify the scale of my axes. At the end, the aim of the program is to visualize EMG datas, with different option but no real data processing.

So the code is the following:

function Appel
  global y l c t d;
  name=0;
  f=figure('units', 'pixels',...
    'position', [300 300 300 300],...
    'MenuBar', 'none');
  ml=uimenu(f, 'Label', 'Load',...
    'Callback', {@meme});
  a=axes('units', 'pixels',...
    'position', [10 100 280 180],...
    'tag', 'axe');
  gogo=uicontrol('style', 'pushbutton',...
    'position', [10 10 50 30],...
    'String', 'set axe',...
    'callback',{@go});
  S.fh=figure('units', 'pixels',...
    'position', [100 100 200 150],...
    'MenuBar', 'none',...
    'visible', 'off');
  S.duree=uicontrol('style', 'edit',...
    'position', [10 90 50 30],....
    'String', 'Durée');
  S.valide=uicontrol('style', 'pushbutton',...
    'position', [10 30 50 30],...
    'String', 'Valide',...
    'callback', {@recup});

function[]=meme(varargin)
  [name path]=uigetfile('*.txt', 'open emg');
  while name ==0
    pause(0.1);
    disp('wait for it...');
  end
  disp(name);
  y=load(name);
  axes(a);
  plot(y);
  [l c]=size(y);
  set(S.fh, 'visible', 'on');
end

function[]=recup(varargin)
  d=get(S.duree, 'String');
  t=linspace(0,d,l);
end        

function[]=go(varargin)
  axes=a;
  plot(y, t);
end

First i'm loading a .txt file with the data. Then another figure appears, in order to give to the axes the X limit max. I want my axe graduate from 0 to an X value. But despite it seems to work when I'm doing it in command line, here I have the following error msg:

">> Appel
sample.txt
Error using  .* 
Matrix dimensions must agree.
Error in linspace (line 30)
  y = d1 + (0:n1).*(d2 - d1)/n1;

Error in Appel/recup (line 61)
      t=linspace(0,d,l);

Error while evaluating uicontrol Callback"

unfortunately, I can't send you the sample.txt file, it's 10Mo of :

   1.6484212e+01
   1.5100857e+01
   3.9246697e+01
   4.3396763e+01
   4.6414993e+01
   4.6289233e+01
   5.6853038e+01
   5.7859115e+01

Thank you by advance for your help!

Answer 1

[dpb]

...
d=get(S.duree, 'String');
t=linspace(0,d,l);

d is a character variable of length of however many characters it is; you likely mean

d=str2num(get(S.duree, 'String'));
t=linspace(0,d,l);