MATLAB: String indexing [A = str(str == ‘e’)] ?

arrayarrayscharchar arrayindexindexingstringstring index

str = 'somebody forgot to do the dishes';

A = str(str == 'e');

Why is the following code output as 'eee'. Shouldn't it be just 'ee'?

Thanks

Best Answer

There are e's in the words "somebody", "the", and "dishes".

Related Solutions

MATLAB: Str2double/str2num

Floating point variables do not have leading 0's physically stored in memory (not counting the denormalized numbers of course). So 0001 and 1 are stored exactly the same in memory. If you want to display the leading 0's then you need to use a format that specifies that on print out. E.g.,

>> day = '0001'
day =
0001
>> d = str2double(day)
d =
     1
>> fprintf('%04d\n',d)
0001

MATLAB: Num2str or str2num

Ryan, if you can read in from your input (say, with textscan) and stuff the name into a cell array and stuff the numbers into a double array, then you can sort the double array and sort the cell array the same way, like in this (untested) code:

% Create sample data:
names = {'Bob'; 'Joe'; 'Sally'}
grades = [97 87 88]
% Now sort by ascending grade number:
[sortedGrades sortOrder] = sort(grades, 'ascend');
% Sort the names the same way.
sortedNames = names(sortOrder);
% Now print out to the command window.
fprintf('Name      Grade\n');
for k = 1 : length(sortedGrades)
fprintf('%s   %d\n', sortedNames{k}, sortedGrades(k));
end

In the command window:

names = 
    'Bob'
    'Joe'
    'Sally'
grades =
    97    87    88
Name    Grade
Joe     87
Sally   88
Bob     97

Best Answer

Related Solutions

MATLAB: Str2double/str2num

MATLAB: Num2str or str2num

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