MATLAB: What is the difference between %d and %i

% d vs. %i

I am wondering what the difference is between %d and %i. For fprintf, they are the same. If there is no difference at all, then why do we have both of them?

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There appears to be no difference according to the help. My guess is they allowed both to make it easy for people coming from other programming languages where they might have used one or the other of those letters in that other language.

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MATLAB: Difference between %d and %f

Refer to the documentation.

%d represents signed integers (base 10).

sprintf('John is %d years old', 7)
% 'John is 7 years old'

%f represents floating point numbers.

sprintf('The first 8 dp of pi are %.8f', pi)
%  'The first 8 dp of pi are 3.14159265'

%f can also be used to represent integers by rounding floating point inputs. %d cannot be used in this way.

sprintf('Pi is rounded to %.0f', pi)
% 'Pi is rounded to 3'
sprintf('Pi is rounded to %.d', pi)
% 'Pi is rounded to 3e+00'

MATLAB: Difference

If I remember correctly, diff works across the first non-singleton dimension. So diff(A) works across columns and diff(A(1, :)) works across rows.

x = [1,2,3; 4,5,6];
diff(x, [], 1)
ans =
   3     3     3
diff(x, [], 2)
ans =
   1     1
   1     1

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MATLAB: Difference between %d and %f

MATLAB: Difference

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