[MUG] Variables in an array

[MUG] Re: Variables in an array
Author: Maple Group    Posted: 31/03/2000 15:10:42 GDT
>> From: Maple Group On Tue, 28 Mar 2000, Jonathan Dentch wrote: |> I need to create an array of values. However, Maple |> won't store the values when I use the variable q[]. |> C:=array(1..11,1..1,[[500.],[q[1]],[q[2]],[q[3]],[q[4]],[q[5]],[q[6]],[q[7]],[q[ 8]],[q[9]],[123.23]]); |> > q:=seq(100./(360*i*0.25),i=1..9); |> I wish C to be all numerics, not variables. Please |> advise. -=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=- Date: Wed, 29 Mar 2000 14:34:18 -0500 (EST) From: Edwin Clark To: Jonathan Dentch Subject: Variables in an array Try this, which, by the way, is an easier way to set up the matrix: restart: > with(linalg):Warning, new definition for norm Warning, new definition for trace > C:=transpose(matrix([[500.,seq(q[i],i=1..9),123.23]])); Now you want to substitute certain values for the variables q[i]. This can be done thusly: qvalues:=seq(100./(360*i*0.25),i=1..9); > subs(seq(q[i]=qvalues[i],i=1..9){},eval(C)); ------------------------------------------------------ W. Edwin Clark Department of Mathematics, University of South Florida, 4202 East Fowler Avenue, PHY 114, Tampa, FL 33620-5700 http://www.math.usf.edu/~eclark/ ------------------------------------------------------ -=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=- Date: Wed, 29 Mar 2000 14:55:06 -0800 (PST) From: Robert Israel To: Maple Users Group Subject: Variables in an array Try this (after assigning C and q as above): > C:= map(eval,C); Robert Israel Department of Mathematics http://www.math.ubc.ca/~israel University of British Columbia Vancouver, BC, Canada V6T 1Z2 -=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=- Date: Thu, 30 Mar 2000 10:54:40 +0200 From: Preben Alsholm To: Subject: Variables in an array The following should do it: C1:=map(eval,C); Preben Alsholm Technical University of Denmark -=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=- Date: Thu, 30 Mar 2000 12:04:45 +0200 From: Barsuhn Subject: Variables in an array To: Dear Jonathan, assignments outside an array, table or matrix do not directly cause alterations inside these data structures. By redefining your array C via C:=map(eval,C); your values of the q[i] have entered C, as you may see by the statements print(C); or eval(C); All the best Jurgen -- ------------------- Prof. Dr. Jurgen Barsuhn Fachhochschule Bielefeld University of Applied Sciences Fachbereich Elektrotechnik und Informationstechnik D-33511 Bielefeld ----------- -=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=- Date: Thu, 30 Mar 2000 13:26:01 +0200 From: Adri van der Meer To: Subject: Variables in an array This is an instance of the "last name evaluation" in arrays and tables. You can force the evaluation of the elements of C to values by: > C := map(eval,C): -- A. van der Meer Dept. Applied Mathematics University of Twente Phone +31 (53) 4893427 P.O. Box 217 Fax +31 (53) 4894824 7500 AE Enschede -=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=- Date: Thu, 30 Mar 2000 09:58:02 -0500 From: Gyrya Pavel To: Subject: Variables in an array Use > q:=[seq(100./(360*i*0.25),i=1..9)];

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