Assemble a matrix

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Assemble a matrix

Pepep (guest) 09 Dec 2014 23:12

Hi I wonder if there are any program to assemble matrices …?
Or if you could give each element of an array variable coordinate ..?
Hola quisiera saber si ya hay algun programa para poder ensamblar matrices…?
O si se podria dar a cada elemento de una matriz una coordenada variable..?

Re: Assemble a matrix

Michael2_3B 10 Dec 2014 04:09

Could you explain your question a bit more? I'm not sure I understand what you mean. Do u mean assemble using something like Asm( or do you mean like putting 2 matrices together into 1 matrix or what? And for your second question do you mean like how to figure out the coordinates of a number inside a matrix or what?

Pepep (guest) 11 Dec 2014 02:19

Hello, aver I explain in more detail I have a matrix of (2x2) of each row and column has a number you want to put this matrix into another higher dimension (9x9) while maintaining the posion row and column I of the item in the first matrix.
Nose whether as heard the term assembly matrices is used to solve structures to be more accurate on the issue of Method stiffness.
We would appreciate if you can help.

Michael2_3B 11 Dec 2014 02:46

Well, I'm still not completely sure what you're wanting (your english is pretty bad(not to be rude), but I think I can understand why, since you also posted in spanish). However, I think I might still be able to explain something to you, but it may not be what you want…

I think this is what you're asking:
To change the dimension from a 2x2 to a 9x9, you can do

{9,9}→dim([A])

The dim( command can be found in [2ND] [MATRX] [MATH] and then the 3rd option, and make sure you put in [A] by selecting [2ND] [MATRX] and then the 1st option. (DON'T actually type the brackets and the A in manually)

When you use this command, the position of all the numbers in the matrix will stay at the same location, so don't worry about that.

Silver Phantom 11 Dec 2014 02:57

unfortunately this is an nspire he is using, so what michael just said wouldnt work.

Open the Expression templates.

Highlight the Variable Size Matrix template (see the first screen).

Press [ENTER] to open the Create a Matrix dialog box, as shown in the second screen. Use the keys to set the number of rows and columns.

Press [ENTER] to paste a blank matrix with the specified dimensions

You can also do variable name :=[row 1element 1, row 1 element 2…; row 2 element 1…..]

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The Silver Phantom welcomes you

Michael2_3B 11 Dec 2014 03:21

Oh sorry, I didn't realize that this was under Nspire programming :) It might help if it said what forum a post was under other than only above the summary box.

Pepep (guest) 11 Dec 2014 03:35

Michael2_3B
Like Thanks and if my English is bad is because I am using a translator, but seriously thanks for the intention

Pepep (guest) 11 Dec 2014 03:37

Hi Might be more specific …

Pepep (guest) 11 Dec 2014 03:39

Hi SILVER Might be more specific …