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Math Forum » Discussions » Software » comp.soft-sys.math.mathematica

Topic: Assigning part of indexed object
Replies: 12   Last Post: Jun 30, 2011 8:00 PM

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magma

Posts: 206
Registered: 7/5/07
Re: Assigning part of indexed object
Posted: Jun 23, 2011 7:26 AM
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On Jun 22, 1:29 pm, "Fabrice P. Laussy" <fabrice.lau...@n0spam-
gmail.com> wrote:
> How do you set the part of an indexed object, say:
>
> m[1] = Range[5];
>
> is my indexed object (I could have m[2], etc.). Now I
> want to do something like:
>
> m[1][[1]] = 10;
>
> with effect of having m[1] read:
>
> {10, 2, 3, 4, 5}
>
> but of course the line above evaluates to 1 = 10.
>
> This could be achieved by having a non-indexed object get
> in the way, e.g., m1=m[1], assign m1 and then return to
> m[1]=m1, but I believe there should a more elegant way.

Use

ReplacePart[m[1], 1 -> 10]

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