Problem 1036. Cell Counting: How Many Draws?

Solution 1868534

Submitted on 8 Jul 2019

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SJ Won on 8 Jul 2019

Can someone help? I'm trying to learn how to use cellfun and I don't understand it completely.

Ned Gulley on 9 Jul 2019

Here's one way you can use cellfun to solve this problem. I made an anonymous function called isDraw.

isDraw = @(letter) letter=='D'
d = cellfun(isDraw,games)
draws = sum(d)

JM Lippmann on 22 Oct 2020

Use contains to check how many elements == 'D', then sum

draws = sum(contains(games,'D'))

Test	Status	Code Input and Output
1	Fail	games = {'D','D','A','H','D','H'}; draws = 3; assert(isequal(how_many_draws(games),draws)) Error in solution: Line: 4 Column: 18 Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.
2	Fail	games = {'D','D'}; draws = 2; assert(isequal(how_many_draws(games),draws)) Error in solution: Line: 4 Column: 18 Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.
3	Fail	games = {'H','H','A'}; draws = 0; assert(isequal(how_many_draws(games),draws)) Error in solution: Line: 4 Column: 18 Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.
4	Fail	games = {'D','H','H','A','D','H','H','A','D','H','H','A','D','D'}; draws = 5; assert(isequal(how_many_draws(games),draws)) Error in solution: Line: 4 Column: 18 Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.

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