Matlab Cody——Basics on Vectors题解

0. Matlab Cody 简介

Matlab Cody是一个类似Leetcode的oj网站，网址：https://ww2.mathworks.cn/matlabcentral/cody

1. Problem 3. Find the sum of all the numbers of the input vector

function y = vecsum(x)
   y = sum(x,'all')
end

2. Problem 6. Select every other element of a vector

function y = everyOther(x)
  y = x(1:2:end);
end

3. Problem 247. Arrange Vector in descending order

function y = desSort(x)
  y = sort(x,'descend');
end

4. Problem 135. Inner product of two vectors

function z = your_fcn_name(x,y)
  z = dot(x,y);
end

5. Problem 624. Get the length of a given vector

function y = VectorLength(x)
  y = length(x);
end

6. Problem 1107. Find max

function y = your_fcn_name(x)
  y = max(x,[],'all');
end

7. Problem 605. Whether the input is vector?

function y = checkvector(x)
  if isvector(x)
      y = 1;
  else
      y = 0;
  end
end

8. Problem 2631. Flip the vector from right to left

题目要求不能直接使用函数，所以自己写

function y = flip_vector(x)
  y = x(end:-1:1);
end

9. Problem 3076. Create a vector

function y = zeroToNby2(n)
  y = 0:2:n;
end

10. Problem 1024. Doubling elements in a vector

function B = your_fcn_name(A)
  B = zeros(1,2*length(A));
  B(1:2:end-1) = A;
  B(2:2:end) = A;
end

11. Problem 42651. Vector creation

function y = vector(x)
  y = 1:x;
end

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