load a data

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Niki
Niki 2011-8-31
I know that we can load data with different format,
I would like to put in a loop for example if I==1; load .... end
something that if the data is saved in *.txt or *.xls or *.mat or anything which Matlab can read it
the name of the file let say saved as X.
therefore
if I==1 load X load X.txt numeric= xlsread('X'); if I==2 uiimport end end
but I would likein the first step if i==1 , then if the file was one those format, then be loaded by Matlab
  1 个评论
Niki
Niki 2011-8-31
maybe this ?
if I==1
load X
elseif
load X.txt
elseif
numeric= xlsread('X');
elseif I==2
uiimport
end
end

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回答（2 个）

Walter Roberson
Walter Roberson 2011-8-31
loadworked = false;
try
load(X)
loadworked = true;
end
if ~loadworked
try
uiimport(X);
loadworked = true;
end
end
if ~loadworked
error('Bleh, could not load or import the file!')
return
end
  1 个评论
Niki
Niki 2011-8-31
Thanks Walter but I would like to put 1 or 2
because i use of input ('Import data=> from file=1, from workspace=2 ? ');

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Fangjun Jiang
Fangjun Jiang 2011-8-31
importdata() automatically does that. What is your purpose? To learn if-else statement?
To check the file extension, use fileparts().
I=input('Import data=> from file=1, from workspace=2 ? ');
if I==1
[PathStr,File]=uigetfile;
[Trash,FileName,FileExt]=fileparts(File);
if strcmpi(FileExt,'.txt')
a=textread(File);
elseif strcmpi(FileExt,'.mat')
a=load(File);
elseif strcmpi(FileExt,'.xls')
a=xlsread(File);
else
error('Unrecognized File!');
end
elseif I==2
%do stuff
else
error('Invalid input');
end
  4 个评论
显示 2更早的评论
Niki
Niki 2011-9-1
you think I should not mention a while ? because if it is not 1 nor 2 , then the program will stop , No?
therefore it should be something that until I enter 1 or 2 , the program need the input
on the other hand, I would like to read the data from a file
then I use of >>uiimport
I would like the program stay until I load the data using uiimport and then continue and not when I load the data then it stop
Fangjun Jiang
Fangjun Jiang 2011-9-1
See edit. You can use uiimport() or importdata()

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