MaplePrimes - Questions and Posts tagged with hours

Differentiating a function and then evaluating it

dennis995 — Wed, 13 Apr 2011 23:56:15 Z

Ive tried this for hours and can't get it to work. Any help would be greatly appreciated. I need to

find a 10 significant figure approximation to the 10^th derivative of

evaluated at x = -2.

Ive tried using this maple command:

evalf(subs(x=-2,diff((sin((x^2...

Massive Matrix, Faster Computing Wanted

tennisman03110 — Mon, 04 Apr 2011 02:34:49 Z

I am using finite element analysis and have 47008 nodes, so require a 47008 by 47008 matrix. I wish to create the matrix using a procedure and using if statements to fill in the matrix with the equations (mostly repeating and every element in each row is 0 excpet for 4 or 5). Anyway, I have tested my solution method on a much smalller matrix and know it works. My question is if there is a way to create such a large matrix without getting a memory error, and...

How can i reduce the runtime

dilumfernando — Fri, 13 Aug 2010 08:41:47 Z

I just started using Maple few weeks ago, so i am very new to Maple. I tried to write a program to:

1. read data from excel

2. process the data obtained from different excel sheets to find different possible combinations and calculate costs

3. then to find the minimum cost option

program i wrote is

> with(ExcelTools);
> SHEET1 := Import("analysis.xls", "su1", "A4");
`output redirected...`> print(); # input placeholder

Immediate posts are listed as posted 4 hours ago

Christopher2222 — Thu, 03 Jun 2010 20:02:58 Z

I just finished a post and it said it was posted 4 hours ago?