15 replies to this topic

[Colombia]

how can i write this on Lua :

On basic:

[[1,2][3,4]] => Mat_A
6 => Mat_A[1,1]
PrintNatural Mat_A



Thanks!!!!!!!!!!!!!!!

[girdeux]

how can i write this on Lua :

On basic:

[[1,2][3,4]] => Mat_A
6 => Mat_A[1,1]
PrintNatural Mat_A
Thanks!!!!!!!!!!!!!!!

A={{1,2},{3,4}}
A[1][1]=6

for i=1,#A do
print(unpack(A[i]))
end

That's all..

[The_AFX_Master]

Colombia... i have a library that makes easy the matrix/list manipulation.. even easier than Basic.. I'm so busy at now because the Formula SAE tune up.. ( Competition is in 34 days!).. so, i'll upload it soon.. at least less than a week

[Colombia]

why this doesn`t work


require("cas")
Mat_A={}
d=input("Dimension of the Matrix:")

for i=1,d do
for j=1,d do
n=input("element "..i..","..j..":")
Mat_A[i][j]=n
end
end

[The_AFX_Master]

Colombia, don't use the CAS package with LUA to manipulate matrices. ,is weird. Lua tables are powerful enough to handle matrices. see your email today. i'll send you a package for matrix manipulation that make these tasks far easy.

[Orwell]

Anyway, this will actually work:

require("cas")
Mat_A={}
d=input("Dimension of the Matrix:")

for i=1,d do
Mat_A[i] = {} -- initialise each row as a table before inserting new elements!
for j=1,d do
n=input("element "..i..","..j..":")
Mat_A[i][j]=n
end
end

[PAP]

*Sigh* Matrix manipulation in CPLua is primitive, just as in C/C++; we had a looong discussion about that in the past, and the conclusion was that matrix manipulation will remain primitive, because the short-lived "mat" package was unavoidably slow.

Anyway, don't use the CAS within CPLua, unless you need it disparately. In this case, you don't have any reason to do so: using the CAS will only make your program slower. Use CPLua's "tables" instead; they are weird, but at least the job can be done.

[Colombia]

Why CpLua doesn't have a horizontal scroll???
When i uses this code

A={{1,2},{3,4}}
A[1][1]=6

for i=1,#A do
print(unpack(A[i]))
end

with a matrix 6 x 6 complex it show a desaster. The element of the same row continuo on the next line, it is confuse.

Thanks

[Orwell]

There is indeed no horizontal scrollbar in the Console window (that you see when you use the "print()" function")...

I would suggest you to try the UI package, there is a nice "mathedit" component that you might use to display mathematical expressions like matrices and CAS formulas

[Colombia]

I would suggest you to try the UI package, there is a nice "mathedit" component that you might use to display mathematical expressions like matrices and CAS formulas

Orwell, I read the "uifunction.txt" but I could not find the function than make this possible.
I learned how to create a window (ui.windows{...}) and included some text editable or not (ui.textedit{..}) and other things, but what is the function that allow me to call the matrix?

Thanks!!!

[Orwell]

Orwell, I read the "uifunction.txt" but I could not find the function than make this possible.
I learned how to create a window (ui.windows{...}) and included some text editable or not (ui.textedit{..}) and other things, but what is the function that allow me to call the matrix?

Thanks!!!

You can try something like this to display a matrix (or any other CAS expression):

require "ui" "cas"
local win, me

win = ui.window({name="Test", x=3, y=3, width=154, height=180})

me = ui.mathedit({x=0, y=0, width=152, parent=win})

me:setexpr(cas("[[1,2][3,4]]"))

ui.button({text="Quit", x=122,y=79, parent=win, 
  _clicked = function(self) ui.stop() end})

win:show(true)
ui.start()

[Colombia]

I copy to the CPLua on my PC and works but on my ClassPad doesn`t.

attempt to call field "mathedit" (a nil value)

[Orwell]

Are you sure you have the last version (0.9E)?

[Colombia]

ohhhhhhhh, I have the 0.9D.

Thanks

[sadjad]

how can i work with matrix on lua??
i mean i wanna run a program and i need to know how can i write some matrix?
for example 3*3 such as :
3 3 3
2 7 9
1 3 11

[MicroPro]

Hello sadjad and welcome to UCF! You should introduce yourself.

There are already answers in the previous posts. It would look like M = { {3, 3, 3} , {2, 7, 9} , {1, 3, 11} } but I doubt you want to do that because matrix multiplication, etc need additional code. However LNA (download link) has some Matrix functions.

Alternatively you can use CP's native matrix handling like Orwell showed in post #11 in this topic.