MATLAB: How to search a word both uppercase and lowercase given a specified string

caselowercaseMATLAB and Simulink Student Suiteregexpsearchuppercase

MIM Maestro puts volume data inside the table variable names:
Rectum (4)(Volume: 57.77)  Bladder (5)(Volume: 139.40)
However, sometimes the name is lowercase, e.g. 'bladder'. If one wishes to pull the volume '139.40' from the CSV file, how can one search for both 'Bladder' and 'bladder' in a single query given an input string?
The following function only searches the entered string with regexp; if the input organ string is 'Bladder', doesn't regexp neglect 'bladder'?
function output = GetVolumesFromDVH(organ)
   [omitting code to loop through multiple files...]
   searchstring = [organ,'_'];
   [...]
       output(fileloop) = GetOrgVol(filepath,searchstring);
   [...]
end
function volume = GetOrgVol(filepath,searchstring)
 % get list of variable names
 opts = detectImportOptions(filepath, 'NumHeaderLines', 1);
 % we find the column containing the organ volume
 OrganSearching = regexp(opts.VariableNames,searchstring);
 for loop = 1:numel(opts.VariableNames)
     if OrganSearching{loop} == 1
         index = loop;
     end
 end
 % extract volume from said string
 volume = extractAfter(opts.VariableNames{index},'Volume_');
 volume = sscanf(strrep(volume,'_','.'),'%f');
end

Best Answer

The regexpi (link) function is the case-insensitive version of regexp.
Related Question