Find does not work as in the help of Matlab2015a ?

Question

Maria 2015-8-11

0
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https://ww2.mathworks.cn/matlabcentral/answers/233219-find-does-not-work-as-in-the-help-of-matlab2015a

评论： Maria 2015-8-11

采纳的回答： Azzi Abdelmalek

在 MATLAB Online 中打开

Hi,

I took this example from Matlab help

Elements Equal to Specific Values
To find a specific integer value, use the == operator. For instance, find the element equal to 13 in a 1-by-10 vector of odd integers.
x = 
1:2:20
x =
 1     3     5     7     9    11    13    15    17    19
k = find(x==13)
k =
     7

Then I did it on the command window:

x = 1:2:20
x =
       1     3     5     7     9    11    13    15    17    19
>> k = find(x==13)
k =
       0

It should be k = 7. Am I missing something in the command window? I don't see the error, since it is exactly the copy and past from Matlab help, but in my case "find" does not work as described in the help.