Table 17.1: POST26 Operations shows the operations that can be performed on the time-history data stored by POST26. (Input quantities FACTA, FACTB, FACTC, and table IC are omitted from Table 17.1: POST26 Operations for clarity of the fundamental operations.) All operations are performed in complex variables. The operations create new tables which are also complex numbers.
Table 17.1: POST26 Operations
| Description | POST26 Command | Real Operation and Result | Complex Operation | Complex Result |
|---|---|---|---|---|
| Addition | ADD | a + c | (a + ib) + (c + id) | (a + c) + i(b + d) |
| Multiplication | PROD | a x c | (a + ib) x (c + id) | (ac - bd) + i(ad + bc) |
| Division | QUOT | a/c |
|
|
| Absolute Value | ABS | |a| | |a + ib| |
|
| Arc Tangent | ATAN | 0 | atan (a + ib) | atan (b / a) |
| Square Root | SQRT |
|
|
|
| Largest Variable | LARGE | Maximum of a and c | ||
| Smallest Variable | SMALL | Minimum of a and c | ||
| Derivative | DERIV | da/dc | d(a + ib)/dc | da/dc + i db/dc |
| Integration | INT1 |
|
|
|
| Common Logarithm | CLOG | log10a | log10(a + ib) |
|
| Natural Logarithm | NLOG |
 n a |
 n (a + ib) |
|
| Exponential | EXP | ea | e(a + ib) | ea(cosb + i sinb) |
| Complex Conjugate | CONJUG | a | conj (a + ib) | a - ib |
| Real Part | REALVAR | a | real (a + ib) | a |
| Imaginary Part | IMAGIN | 0 | imag (a + ib) | b |
| Read Data into Table | DATA | - | - | - |
| Fill Table with Data | FILL | - | - | - |
| See Response Spectrum Generator Description (POST26 - Response Spectrum Generator (RESP)) | ||||
NOTES:
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