day of the week in a month

Write a function dayName that consumes a parameter, day, containing the numerical value of a day in April 2012. Your function should return the name of that day as a string. For example: dayName(24) should return 'Tuesday'. Test your program on two cases: dayName(18) and dayName(27).

This is what the code that i ran on matlab it gave me an error i dont understand why

function results = dayName(x)
if (x= 2 9 16 23 30)

results = 'Monday' ;

elseif (x= 3 10 17 24)

results = 'Tuesday' ;

elseif (x= 4 11 18 25)

results = 'Wednesday' ;

elseif (x= 5 12 19 26)

results = 'Thursday' ;

elseif (x= 6 13 20 27)

results = 'Friday' ;

elseif (x=7 14 21 28)

      results = 'Saturday');

elseif (x= 1 8 15 22 29)

      results = 'Sunday');

end

else

end

Answer 1

[Honglei Chen]

You want to use

if any(x==[2 9 16 23 30])

and so on. Also at the bottom, you seem to have an extra else hanging around.

[sam]

i put this as my code but i still do not get the correct answer in the command window?

function disp = dayName(x)

if any(x== [2 9 16 23 30])

disp = 'Monday' ;

elseif (x== [3 10 17 24])

disp = 'Tuesday' ;

elseif (x== [4 11 18 25])

disp = 'Wednesday' ;

elseif (x== [5 12 19 26])

disp = 'Thursday' ;

elseif (x== [6 13 20 27])

disp = 'Friday' ;

elseif (x==[7 14 21 28])

disp = 'Saturday';

elseif (x== [1 8 15 22 29])

disp = 'Sunday';

end

end

[sam]

never mind i got the answer thank you soo much for the help

[Jan]

Do not forget the "any" in the IF expressions.

Answer 2

[Jan]

This is a homework question, therefore I give a hint for another solution only.

1. You can create the list of names statically:

Names = {'Monday', 'Tuesday', 'Wednesday', 'Thursday', ...
         'Friday', 'Saturday', 'Sunday'};

2. If x is 2, you want to get the 1st element of the cell string.

3. If x is 9, you want to get the same value as for 2. The mod and rem functions can be used to compute the remainder of a division.