hello every one please help me to fix this error

[Arif Hoq]

you have just shown the error which is not sufficient. it is difficult to find out the solution in this pattern. please upload/attach your Code.

[Walter Roberson]

@Arif Hoq

It turns out that enough information was given. The exact command was shown, which allowed me to find the title of the demonstration. The image shows that they are using R2018a, so then it was a matter of going backwards through the archive to figure out what the file name of the example was in R2018a.

Answer 1

[Walter Roberson]

In R2018a and R2018b, the command for that example was

openExample('matlab_featured/xfourier')