Problem with importdata with filename obtained two different ways

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Naveen
Naveen 2012-12-11
Hello,
I am trying to open a data file which contains a number in the file name. As this number keeps changing, I want to come up with the file name using string concatenation. The string concatenation works fine and I get the file name. But, when I try to load the file (tried commands load and importdata) using the obtained file name, I get the error saying "??? Error using ==> importdata at 123 Unable to open file." If I explicitly give the file name then everything works fine. I compared the file name obtained using concatenation with that of actual file name and I get '1'. I am not sure what is going wrong. Here is the code
STR1 = {'TEMP'};
STR2 = {'200'};
STR3 = {'.DAT'};
filename1 = strcat(STR1,STR2,STR3);
filename2 = 'TEMP200.DAT';
%load filename;
A = importdata(filename2);
B = importdata(filename1);
Output is here
??? Error using ==> importdata at 123
Unable to open file.
Error in ==> Averaging at 16
B = importdata(filename2);
String comparison gives '1'
TF = strcmp(filename1,filename2)
TF =
1
Any idea what is going wrong.
Thank you

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回答（2 个）

Image Analyst
Image Analyst 2012-12-11
编辑：Image Analyst 2012-12-11
I wouldn't even mess with cell arrays, but if you really want to, use sprintf() and char():
STR1 = {'TEMP'};
STR2 = {'200'};
STR3 = {'.DAT'};
filename1 = sprintf('%s%s%s', char(STR1), char(STR2), char(STR3))
Naveen
Naveen 2012-12-11
Thank you for the answer. But, I can't understand how it solves my problem of opening and reading the the files TEMP200.DAT, TEMP201.DAT, TEMP202.DAT, ------, TEMP300.DAT in a for loop.

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