MATLAB: Rounding string to certain decimal places

roundstring

hello I have the following code
%This command generates a random number.  
%Do not overwrite the value of number in your own code.
number = 10*rand(1,1);
%Enter the commands for your script mfile here.  
formatSpec = "The number rounded to two decimal places is %d.";
A1 = round(number, 2)
rounded_to_2 = sprintf(formatSpec,A1)
formatSpec = "The number rounded to four decimal places is %d.";
A1 = round(number, 4)
rounded_to_4 = sprintf(formatSpec,A1)
but the rounded value is not what I want. For example I want the value to be 5.34 but it displays 5.340000e+00

Best Answer

When you include %d in your format specifier for sprintf you're telling sprintf that it should expect an integer value in that position. Your values, rounded to two decimal places, may not be integer values. Look at the description of the format specifier input on the documentation page for sprintf (doc sprintf) and see if there's an entry that looks more suitable for floating-point data that may not be integer values.
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