Why doesn't CloudDeploy work in my desktop

Question

I have difficulty in making CloudDeploy in my desktop. Does anyone know why ? Thanks

Here is what I see:

Here is the code if someone would like to test

CloudDeploy[
 Manipulate[
  f[x] = Sin[x];
  Plot[f[k x], {x, 0, 10}], {k, 1, 10}]

 ]

Mathematica 11.0

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What version of Mathematica are you using? The same code works for me without issues. What happens if you evaluate $CloudConnected? — ktm, Apr 28 '17 at 14:51
When I evaluate $CloudConnected, it just returns the same thing to me. — Joey, Apr 28 '17 at 15:04
$CloudConnected should return True. Read the documentation here. — rhermans, Apr 28 '17 at 15:08
It appears to me that the problem lies in the function definition. The form used in the question is something I wouldn't recommend. — Ailton Andrade de Oliveira, Apr 28 '17 at 15:16
@AiltonAndradedeOliveira why, can you reproduce the problem and is it fixed when you change definition? — Kuba, Apr 28 '17 at 20:26
@Joey try a fresh start: http://support.wolfram.com/kb/12464 and if this does not help try contacting WRI Support. Your code should work but noone else can reproduce the problem. — Kuba, Apr 28 '17 at 20:28

Ailton Andrade de Oliveira · Answer 1 · 2017-04-29T22:41:52.963

1

Try to change the function definition.

CloudDeploy[
 Manipulate[
  f[x_] := Sin[x];
  Plot[f[k x], {x, 0, 10}], {k, 1, 10}]
 ]

Note that I am changing f[x]=Sin[x] to f[x_]:=Sin[x]. The key points here are:

x to x_ (the use of a Pattern, the main change here)
= to := (the use of SetDelayed, optional but I would suggest as a good habit for Mathematica newcomers).

I welcome more experienced users to clarify here, but I like to think Mathematica as a kind of term rewriting system. When I say f[x]=Sin[x] all that is said to Mathematica is "if you find literally f[x] change it to Sin[x] (it is creating a kind of DownValues - a good question regarding related concepts is here). Normally, a newcomer do not want this. You would expect to create something that would allow f[3] to be understood as Sin[3]. This is where Patterns come to rescue."

edited Apr 29 '17 at 22:41

answered Apr 29 '17 at 02:55

Ailton Andrade de Oliveira

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That's all true but how does this answer the problem about CloudDeploy? I can use OP's code and deploy it, sure it won't work correctly but that is not the point here. – Kuba Apr 30 '17 at 08:45
@Kuba, I think the main problem is a corrupted session (I +1'ed your comment suggesting a fresh start). I was only able to reproduce the problem by clearing CloudDeploy. However, the syntax used could fail if a Symbol x was already present in the session. Because of this I decided to point to more robust ways of defining functions and related concepts. – Ailton Andrade de Oliveira Apr 30 '17 at 12:26

Why doesn't CloudDeploy work in my desktop

1 Answers1