MATLAB: What does this line of code mean in non-code speak

divfalseleap yeartrue

if (div4 & ~( xor(div100, div400)))

div4 div100 and div400 are given by:

div4 = ((year/4) == floor (year/4));
div100 = ((year/100) == floor (year/100));
div400 = ((year/400) == floor (year/400));

Best Answer

div4, div100, and div400 are all logical variables, 1 or 0.

 if (div4 & ~(xor(div100,div400)))

says "if div4 is true (1) and div100 and div400 are both false or both are true, do something"

~xor(div100,div400)

equals 1 (true) only if both div100 and div400 are false or both are true

Related Solutions

MATLAB: If else condition to determine if a year is a leap year

function Days = GetDays (Y)
if isLeapYear(Y)
   Days = 365 ;
else
   Days = 366 ;
end

Now your problem is to write second function IsLeapYear that returns true for leap years. (hint: see Nitin's answer)

MATLAB: MatLab multiple functions question

The instructions ask for: "The output argument should be a Boolean variable". Your function IsLeapYear does not reply anything yet. This can be done by:

function T = IsLeapYear(Year)
T = ~mod(Year, 4) & (mod(Year, 100) | ~mod(Year, 400))
end

In the 2nd function think twice if this is correct:

m = endYear - startYear;

If endYear equals startYear, m is 0, but it should be 1.

You create v already, but do not use it, but it is a good solution:

for c = 1:m
    b(c) = IsLeapYear(v(c));
end

Now b is a logical vector, which is TRUE for the leap years. You can use it directly to reply the leap years only:

outputArg1 = v(b);

Best Answer

Related Solutions

MATLAB: If else condition to determine if a year is a leap year

MATLAB: MatLab multiple functions question

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