I want to use a list of integers in something like this:
Manipulate[
Sum[i, {i, l}],
{l}
]
Whithout having to use the brackets in the input field, i’d like to use 1,2,3 instead of {1,2,3}.
Is that possible?
Hi Francesco,
Can you please clarify your question. There is no {1, 2, 3} in the posted code so it is not clear what exactly you are trying to replace.
I’m taking a guess that you want to pass separate scalars to a function instead of putting those scalars into a list.
The Wolfram has the concept of sequences which can help. And fortunately, it is easy to switch between sequences and lists. For example, if I define a function as:
f[x : ___] := List[x];
f[x_List] := x;
Then, I can call this function with either:
f[1, 2, 3];
f[{1, 2, 3}];
And get the same result: {1, 2, 3}
If this isn’t what you are talking about, please provide some more info.
THANKS
Thanks Mike,
That’s more or less what i’d like to do, but this behavior does not seem to transpose well into Manipulate expressions.. Or at least i did not manage to make it work.
Let’s say we want to use a sequence in this Manipulate object, and use 1,2,3 as an input instead of {1,2,3}. How could we do it?
I suggest letting your input be a string. Then you can use Evaluate as follows:
input = "1, 2, 3";
Evaluate["{" <> input <> "}"]
This returns the list:
{1, 2, 3}