04-29-2015, 01:01 PM

Hi, I'm programming something where I need to create a 6x6 matrix, I have all the 36 values that I must fill the matrix with. Which is the best command for this?.

Thank you.

Thank you.

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04-29-2015, 01:01 PM

Hi, I'm programming something where I need to create a 6x6 matrix, I have all the 36 values that I must fill the matrix with. Which is the best command for this?.

Thank you.

Thank you.

04-29-2015, 01:49 PM

(04-29-2015 01:01 PM)Cancuino Wrote: [ -> ]Hi, I'm programming something where I need to create a 6x6 matrix, I have all the 36 values that I must fill the matrix with. Which is the best command for this?.Depends on your starting point.

Thank you.

Starting from values

If you enter $$\begin{pmatrix} 11 & 12 \\ 21 & 22 \end{pmatrix}$$ and then call OBJ→ you'll see that the stack contains

11

12

21

22

{2 2}

So you can just push all items in this specific order in the stack call

If you now call →ARRY matrix is back.

Starting from vectors

Push all vectors in the stack and then the # of vectors

[11 21]

[12 22]

2

call COL→

Here we go...

04-29-2015, 01:59 PM

Thank you Tugdual, I'll try that.

I'm making my program with the PUTI command but just testing right now.

I'm making my program with the PUTI command but just testing right now.

04-29-2015, 02:26 PM

(04-29-2015 01:01 PM)Cancuino Wrote: [ -> ]Hi, I'm programming something where I need to create a 6x6 matrix, I have all the 36 values that I must fill the matrix with. Which is the best command for this?.

Thank you.

Hi there many ways for this. in addition of Tuagal post :

1/ If you know the elements of the matrix, just enter it in your program :

[[ 11 21 ] [ 12 22]]

2/ Create a 6x6 identity matrix :

6 IDN

3/ If each element is a function of I J (Line, Column)

6 6 « 10 * + » LCXM @ Create a 6x6 matrix [[ 11 21 31 ...] [12 22 32 ...] ... ]

4/ If your matrice is a variable, for example M you can use this syntax

99 'M(3,5)' STO

`M(I,J)` returns immediatly the value of I columns J row of M

Slower but more readable in many cases than the PUT and GET command

Etc.

04-29-2015, 05:00 PM

The elements of the matrix are variables, and the matrix should be created with them.

04-29-2015, 05:47 PM

Here's another one.

The program that creates the matrix is done, let's name it "MATRIX".

Now I have a FOR loop, for example from 1 to 3, so that it calls MATRIX three times and creates three matrixes. I want to store every matrix according to the FOR index, the first iteration would store the K1 matrix, the second K2 and the third K3.

How can I do this?.

Thank you.

The program that creates the matrix is done, let's name it "MATRIX".

Now I have a FOR loop, for example from 1 to 3, so that it calls MATRIX three times and creates three matrixes. I want to store every matrix according to the FOR index, the first iteration would store the K1 matrix, the second K2 and the third K3.

How can I do this?.

Thank you.

04-29-2015, 06:29 PM

(04-29-2015 05:47 PM)Cancuino Wrote: [ -> ]Here's another one.Two solutions:

The program that creates the matrix is done, let's name it "MATRIX".

Now I have a FOR loop, for example from 1 to 3, so that it calls MATRIX three times and creates three matrixes. I want to store every matrix according to the FOR index, the first iteration would store the K1 matrix, the second K2 and the third K3.

How can I do this?.

Thank you.

- you push them in stack one after the other and then call 3 consecutive STO

- you push them into a list named K which I think is the preferred approach with RPL

04-29-2015, 07:09 PM

What I don't know how to do is the number besides K, for example K2, I don't know how to set a counter that automatically names the variable Ki, being i=1, 2, 3, ...

04-29-2015, 08:07 PM

(04-29-2015 07:09 PM)Cancuino Wrote: [ -> ]What I don't know how to do is the number besides K, for example K2, I don't know how to set a counter that automatically names the variable Ki, being i=1, 2, 3, ...Do you need to?

Try this:

Create a matrix

Press enter twice to have 2 additional copies

Enter 3

Now choose →LIST

See? The 3 matrices are now in a list! Pretty cool isn't it?

Matrices are objects and you can store anything in lists then using GET with any index, you can retrieve a value.

04-29-2015, 08:34 PM

That's a great way to store them. Thank you Tugdual.

I'm trying to make everything automated, so that I end up with the three matrixes stored in three different variables.

I know how to decompose the list and store the matrixes but I can't figure out how to sort them.

Edit: I've finally found the way to do it. "K" i + creates "Ki" then I use ->OBJ and I have 'Ki', where I can store the matrix.

I'm trying to make everything automated, so that I end up with the three matrixes stored in three different variables.

I know how to decompose the list and store the matrixes but I can't figure out how to sort them.

Edit: I've finally found the way to do it. "K" i + creates "Ki" then I use ->OBJ and I have 'Ki', where I can store the matrix.

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