Finding numChanges in array

Question

Olivia Gilliam 2021-2-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/747007-finding-numchanges-in-array

编辑： Daniel Pollard 2021-2-16

i'm trying to write a code that calculates the number of changes in V. There should be 6. (V = [1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1];) However, the code I wrote spits out 18.

This is what I have-

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Daniel Pollard 2021-2-16

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/747007-finding-numchanges-in-array#answer_624967

编辑：Daniel Pollard 2021-2-16

在 MATLAB Online 中打开

Replace

for i=1;length(V)

with

for ii = 1:length(V)

The semicolon -> colon is a typo I suspect, and i has a built in value so it's a bad idea to use it as a variable. Right now, your code runs for i=1, displays length(V) (which is 18) and does nothing else.

The line

numChanges + = 1

will fail when it reaches it. Replace it with

numChanges = numChanges + 1;

which won't fail.