MaplePrimes - answers and comments on Question, indexing a matrix

unapply

Carl Love — Tue, 26 Feb 2013 03:14:22 Z

Here's an example. Here I use 2x2 matrices to save space. I'm sure that you'll be capable to generalize this. The essence is the use of unapply to turn one matrix with a parameter into a constructor for other matrices. (The ?unapply command is much more general than just being used for matrices.)

Download Matrix_function.mw

Many Thanks

jmw193 — Wed, 27 Feb 2013 23:53:02 Z

Carl,

I really appreciate your detailed answer. It couldn't have been more helpful and it's working just fine!

Thanks again,

Justin

Hit another problem

jmw193 — Thu, 28 Feb 2013 01:14:18 Z

Hi Carl,

I used unapply to calculate the transformation matrices, and it worked great. But when I tried to take the next steps in the calculations I ran into another problem when I tried to calculate another matrix using the transformations matrices. I've uploaded my file. If you get a chance, would you mind taking a look at it? If you're busy, I understand, but I'd appreciate any advice you could give me on automating the calculations.

Thanks again,

Justin

Download problem_1.mw

Please post this as a separate question

Carl Love — Thu, 28 Feb 2013 03:58:38 Z

@jmw193 Please post this as a separate question, i.e. in a new thread, and I will gladly answer it then.

@Carl Love I posted my problem

jmw193 — Thu, 28 Feb 2013 05:56:09 Z

@Carl Love

I posted my problem as a new question under the title "Automating matrix calculations". Again, thank you for all the help! The unapply commmand was a great tool to learn about. I should say, I've been using MathCAD for most of my school career, but I've very much enjoyed leaning about Maple after a friend introduced me to it (so much so that I'm doing all assignments this semester in Maple 16!).

Have a great one,

Justin