how to match the first letter of the title of an image with the input query?

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I need to match a letter with the first letter of the name of the image from the database and display the image.
I have done the following code
load 'mydatabase.mat'
Symbol = input('Enter the symbol you want to test for (A,B,C,Five,Point,V)-','s');
for (i=1:length(files))
if(strcmpi(files(i).name(first),'Symbol')==1)
imshow(file);
disp('letter retrieved');
else
disp('Incorrect input');
end
end
The code is giving error on the fourth line since 'first' is not a correct keyword. Please enlighten me Thank you

Accepted Answer

Image Analyst
Image Analyst on 16 Mar 2014
Use 1 instead of first because indexes have to be numbers, or a variable that has a number in it. You never defined first at all so it doesn't know what it is.
  4 Comments
Image Analyst
Image Analyst on 16 Mar 2014
I can't run your code. You did not attach the mat file and did not show how you generated the "files" variable.
Zahra
Zahra on 19 Mar 2014
This is the code used to create the mat file. And i have the corresponding mat file attached as well. I now want to retrieve the image based on the title of the image. Cant figure out where the issue is!

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