Halcyon Calc
Halcyon Calc Lite
Poll
What feature do you want in Halcyon Calc v4.1
Stats plotting
15%
Implement the FORM operation
31%
Built-in catalog of operations
8%
Built-in catalog of units
8%
Printing support
0%
iCloud support for user variables
23%
Other (add a comment)
15%
Total votes: 13
IDN
Argument Types:
Real
Symbol
Array
Result Type(s):
None
Array
Invertible:
No
Valid In Expression:
No
Stack Diagram:
| Real1 | → | Array2 |
| Array1 | → | Array2 |
| Symbol1 | → |
This operation returns an identity matrix. An identity matrix has values zero in all positions except along the diagonal from the top left to the bottom right whose values are all one. An identity matrix is always a square matrix.
If the argument is a real value, then the result is an identity matrix with that many rows and that many columns. If the argument is an array, it must be a square matrix. An error will be returned if it is a vector or non-square matrix. The result will be an identity matrix with the same dimensions.
Finally, if the argument is a symbol, then the value of that symbol must be a square matrix. An identity matrix of the same dimensions will then be stored at that symbol.