Conditional with string wildcard

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hendra kurnia febriawan
评论： hendra kurnia febriawan 2018-9-24
Hi all,
I want to use conditional statement to compare the string name using wild card.
image_folder = 'C:\Users';
filenames = dir(fullfile(image_folder, 'Flat.tif'));
total_images = numel(filenames);
full_name = filenames.name;
disp(full_name);
Text1 = 'Tree'*;
Text2 = 'Flat'*;
if strcmp(full_name,Text2)
disp('OK')
else
strcmp(full_name,Text1)
disp('Not OK')
end
But it always comes with the second text "Not OK"
Anyone can help me with that? Thank you in advance
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hendra kurnia febriawan
hendra kurnia febriawan 2018-9-24
Sorry my question is not clear, I have revised in the below answer
Stephen23
Stephen23 2018-9-24
hendra kurnia febriawan's "Answer" moved here:
Thanks for the comments. I have many image files in that folder with the name Tree1, Tree2,... and Flat1, Flat2,... and want to use loop that read each image and then using if 'the name Tree' then executing some codes else 'the name is Flat' then executing another code, that's why I am using *, so not detecting the exact file's name. The code should be
filenames = dir(fullfile(image_folder, '*.tif'));
total_images = numel(filenames);
full_name = filenames.name;

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采纳的回答

Steven Lord
Steven Lord 2018-9-24
Use startsWith to determine if the file name starts with "Tree" or "Flat".
  1 个评论
hendra kurnia febriawan
hendra kurnia febriawan 2018-9-24
Yeah that works Steven, thank you
if startsWith(full_name,'Tree')
disp('Tree')
else
disp('Flat')
end
Can it be modified to choose not only two parameters tree and flat but also third paramater?
if startsWith(full_name,'Tree')
disp('Tree')
elseif startsWith(full_name,'Tree')
disp('Flat')
else
disp('rock')
end
Like that?or must use other codes?

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更多回答（2 个）

ANKUR KUMAR
ANKUR KUMAR 2018-9-24
I have taken names as filename.
full_name='Tree'
Text2 = 'Tree'; %here is you mistake. Remove * from the last
Text1 = 'Flat'; %here is you mistake. Remove * from the last
if strcmp(full_name,Text2)
disp('OK')
else
strcmp(full_name,Text1)
disp('Not OK')
end
Dennis
Dennis 2018-9-24
You should get a warning that
Text1 ='Tree'*;
is no valid syntax (the * is a problem). If you want to use * as a wildcard try regexp. If the wildcard is always only the ending you could use strncmp:
image_folder = 'C:\Users';
filenames = dir(fullfile(image_folder, 'Flat.tif'));
total_images = numel(filenames);
full_name = filenames.name;
disp(full_name);
Text1 = 'Tree';
Text2 = 'Flat';
if strncmp(full_name,Text2,length(Text2))
disp('OK')
else
strncmp(full_name,Text1,length(Text1))
disp('Not OK')
end

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