texas-instruments


Storing values to a list stored in a string


I would like to store a column of a matrix to a list, whose name is stored in a string. How can one do this?
What I am primarily attempting to do is use a loop to create various lists in which columns of a matrix can be stored. To do this, I am using a for loop and concatenating the "list prefix" with the number, which is then stored in a string. However, when I try to use the Matrlist() command, it does not accept the string as a legitimate list name. Is there a way to override this?
χ²-Test([A],[B])
[B]-[A]→[C]
dim([A])→MD1
⌊MD1(2)→K
For(A,1,K,1)
{0,1}→L₁
{0,A}→L₂
LinReg(ax+b) Y₁
EquString(Y₁,Str1)
sub(Str1,1,length(Str1)-3)→Str)
"EO"+Str1→Str1
Matrlist([C],A,Str1)
End
For(A,1,K,1)
{0,1}→L₁
{0,A}→L₂
LinReg(ax+b) Y₁
EquString(Y₁,Str1))
sub(Str1,1,length(Str1)-3)→Str1
"E"+Str1→Str1
Matrlist([B],A,Str1)
End
Listmatr(⌊EO1²/⌊E1,⌊EO2²/⌊E2,⌊EO3²/⌊E3,[D])
"⌊EO4²/⌊E4,⌊EO5²/⌊E5,⌊EO6²/⌊E6,⌊EO7²/⌊E7,⌊EO8²/⌊E8,⌊EO9²/⌊E9)
SetUpEditor
Disp [D]
You can't create a reference to a list from a string.
In general, there is no way to store anything to a dynamically selected variable. The expr( command can evaluate a list whose name is in a string, but cannot return an lvalue.
In your case, the problem of doing element-wise division on two matrices can be solved by augmenting a new column vector onto matrix [D] in a loop: something like
χ²-Test([A],[B])
[B]-[A]→[C]
dim([A])→MD1
⌊MD1(2)→K
Matr►list([B],1,L1
Matr►list([C],1,L2
List►matr(L1/L2,[D] //first column
For(A,2,K)
Matr►list([B],A,L1
Matr►list([C],A,L2
List►matr(L1/L2,[E]
augment([E],[D]→[D] //other columns
End
SetUpEditor
Disp [D]
The separate code for the first column is required since empty matrices cannot be created.

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