Matlab Sort Command Output
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I have an equation and the user enters certain numbers into this equation, then it gets x1 x2 x3 numbers but wants them in result with sort, I use the "sort" command for this, but "sort" writes the value of x1. I want the result to be in x1 x2 x3. For example, equation gives me
x1=3 x2=1 x3=2 a=[x1 x2 x3] sort (a) = 1 2 3
I want it to be x2 x3 x1. How can I do that?
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Answers (2)
Tommy
on 14 May 2020
How about this?
x1=3;
x2=1;
x3=2;
a=[x1 x2 x3];
varNames = {'x1','x2','x3'};
[~, idx] = sort(a);
fprintf('Output:\n%s\n', strip(sprintf('%s ', varNames{idx})))
Prints:
Output:
x2 x3 x1
Or if you don't want to have to type the variable names, I guess you could do this?
fprintf(mySort(x1, x2, x3));
function s = mySort(varargin)
[~, idx] = sort(cell2mat(varargin));
s = cell(numel(idx),1);
for i = 1:numel(idx)
s{i} = inputname(idx(i));
end
s = sprintf('Output:\n%s\n', strip(sprintf('%s ', s{:})));
end
Which prints the same thing.
Stephen23
on 14 May 2020
Edited: Stephen23
on 14 May 2020
Using separate variables makes this rather complex.
It would be much simpler if you stored the data in arrays, e.g. in one table:
>> names = {'x1';'x2';'x3'};
>> values = [3;1;2];
>> T = table(names,values)
T =
names values
_____ ______
'x1' 3
'x2' 1
'x3' 2
>> T = sortrows(T,'values') % this is all you need
T =
names values
_____ ______
'x2' 1
'x3' 2
'x1' 3
Better data design -> simpler, neater, more efficient code.
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