MathGroup Archive 2010

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Assign value to variable

  • To: mathgroup at
  • Subject: [mg111244] Re: Assign value to variable
  • From: magma <maderri2 at>
  • Date: Sun, 25 Jul 2010 01:57:11 -0400 (EDT)
  • References: <i2eagg$q5b$>

On Jul 24, 11:07 am, miguelwon <miguel... at> wrote:
> Hello.
> I'm working with some expressions that are dependent of several
> variables co1, co2, ... , con. I would like to know how can I assign
> values iteratively to some of these variables. I tried:
> For[i=1,i<=100,i++,
> Symbol["co"<>ToString[i]]=0;
> ];
> but it doesn't work. For each iteration it says coi is Protected.
> Can someone help me?
> Thanks

I would rather use:
Table[co[i] = 0, {i, 100}]

and would advise you NOT to use co1, co2, etc for indexed variables.
Things like co1 and co5 are difficult to manage (for ex. make a list),
while things like co[1] and co[5] are very flexible, as you see from
my simple Table above.
Also: one must be careful what one puts on the LHS of "=". Not
everything is accepted.
In this case you were trying to  give a value to Symbol, which is not
Even using Upvalues does not help.
Last , but not least,why use For, when you can use Table?

  • Prev by Date: Re: trading
  • Next by Date: Re: Assign value to variable
  • Previous by thread: Re: Assign value to variable
  • Next by thread: Re: Assign value to variable