Does anyone know if it is possible to define a variable which will determine the size of a matrix. From where on the created matrix is again an input and not an output.

For exaple:

n:=1 (number of rows)
m:=3 (number of koloms)

creates a matrix of 1 kolom and 3 rows as below

y:= [* * *]

where the '*' are emty and can be spicified by the user.

Beste regards,
Rens Servais

Check out this example.

Matrix.sm (7 KiB) downloaded 67 time(s).

Wrote

Does anyone know if it is possible to define a variable which will determine the size of a matrix.

Both ways: empty and '0'

Other solution




Best Regards

Carlos

Wrote

Wrote

Does anyone know if it is possible to define a variable which will determine the size of a matrix.

Both ways: empty and '0'

Thanks Jean Giraud,

Your solution suits the best for me, but I can not reproduce it. See below. What do I do wrong?

Beste regards,
Rens

Matrix.sm (31 KiB) downloaded 41 time(s).

Wrote

I can not reproduce it

Do one of the following:

• press CTRL+M
  
• write mat(
  
• write mat and press the tabulation key
  
• on the right side of the windows, click on the first element of the Matrices toolbox
  
  
• use the function dialog (press CTRL+E or choose the Insert > Function menu item or click on the fx symbol from the toolbar) choose the Matrix and vector group and search mat (click on whatever item and press m), then double click it or click on the insert button
  File not found. File not found.
  
  

Wrote

Your solution suits the best for me, but I can not reproduce it

That will work for you. At this point, you can address any element.
The empty matrix has almost no use.

Plenty of matrix manipulation in there.
There are more and more, that should help.

Utilities Matrix Treasury_2 Copy.sm (109 KiB) downloaded 67 time(s).
Utilities Matrix Treasury_0 Copy.sm (376 KiB) downloaded 65 time(s).
Utilities Matrix Treasury_1 Copy.sm (372 KiB) downloaded 59 time(s).