MATLAB: How to add commas to numbers using fprintf

commasnumbers

Hello,

How do I add commas to numbers using fprintf? My customer wants me to write out tables and have commas in the numbers to better read it. For instance, 123456789.0 would be written out as 123,456,789.0. Thanks.

Best regards,

Bill Rooker

Best Answer

fprintf cannot do that, but you will find several FEX submissions that can create a string with commas as thousands separators:

https://www.mathworks.com/matlabcentral/fileexchange/52832-num2sepstr

https://www.mathworks.com/matlabcentral/fileexchange/41520-insert-commas-into-numbers

If you read the comments to those submissions you will also find several improvements to consider.

Related Solutions

MATLAB: Equality between different number of variables problem

Where C is your cell array:

isequal(C{:})

Learn how this works by reading the isequal documentation, and these:

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists

MATLAB: Is there a format in MATLAB to display numbers such that commas are automatically inserted into the display

The ability to automatically format a number to display it with the commas inserted at the right places for easy reading is not available in MATLAB.

To work around this issue, the number needs to be converted to a string. Then, commas can be inserted between the string characters. The following function achieves this purpose:

function [str]=num2bank(num)
     str = arrayfun(@(x) num2bankScalar(x) , num, 'UniformOutput', false) 
end
function [str]=num2bankScalar(num)
     num=floor(num*100)/100
     str = num2str(num)
     k=find(str == '.', 1)
     if(isempty(k))
         str=[str,'.00']
     end
     FIN = min(length(str),find(str == '.')-1)
     for i = FIN-2:-3:2
     str(i+1:end+1) = str(i:end)
     str(i) = ','
     end
end

Best Answer

Related Solutions

MATLAB: Equality between different number of variables problem

MATLAB: Is there a format in MATLAB to display numbers such that commas are automatically inserted into the display

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