imat_fn/minus

Purpose

Subtract ordinates (f1-f2).

Syntax

f1+f2
f-x
x-f

Description

The following subtraction operations are possible with imat_fn objects:

• Subtracting two imat_fn objects causes their ordinate values to be subtracted. If one of the operands is a single function (1x1), then its ordinate will be used with all elements in the other operand. If both operands are function arrays, they must have the same dimensions. The data attributes of the result of a subtraction operation will be taken from the left operand. No checking is performed to assure that the ordinate attributes of the two operands are consistent.

• Subtracting a numeric array or scalar from an imat_fn causes the numeric values to be subtracted from the ordinate values of the imat_fn.

• Subtracting an imat_fn from a numeric array or scalar causes the ordinate values of the imat_fn to be subtracted from the numeric values.

Examples

>> f=imat_fn(3,'ordinate',reshape(1:15,5,3))

f =
3x1 IMAT Function with the following attributes:
Record Name          FunctionType     OrdNumDataType   NumberElements
-------------------- ---------------- ---------------- ----------------
1_(1X+,1X+)          Time Response    Unknown          5
2_(1X+,1X+)          Time Response    Unknown          5
3_(1X+,1X+)          Time Response    Unknown          5

>> f.ordinate

ans =
     1     6    11
     2     7    12
     3     8    13
     4     9    14
     5    10    15

>> g=f-3; g.ordinate

ans =
    -2     3     8
    -1     4     9
     0     5    10
     1     6    11
     2     7    12

>> g=g-[-1 0 3]; g.ordinate

ans =
    -1     3     5
     0     4     6
     1     5     7
     2     6     8
     3     7     9

>>

See Also

imat_fn/plus