load a data

Question

Niki 2011-8-31

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/14884-load-a-data

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

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Niki 2011-8-31

maybe this ?

if I==1

load X

elseif

load X.txt

elseif

numeric= xlsread('X');

elseif I==2

uiimport

end

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Answer 1

Walter Roberson 2011-8-31

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https://ww2.mathworks.cn/matlabcentral/answers/14884-load-a-data#answer_20237

在 MATLAB Online 中打开

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

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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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Answer 2

Fangjun Jiang 2011-8-31

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/14884-load-a-data#answer_20238

在 MATLAB Online 中打开

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