Tutorial: Producing Lookup Table Data (Fixed-Point Blockset)

Fixed-Point Blockset

Comparing the Examples

The following table summarizes the results for the examples. Note that when you specify errmax, even spacing requires more data points than unrestricted, and power of two spacing requires more points than even spacing.

Example
Options
Spacing
Worst Case Error
Number of Points in Table

1
errmax=2^-10
'unrestricted'
2^-10
16

2
nptsmax=21
'unrestricted'
2^-10.933
21

3
errmax=2^-10
'even'
2^-10.0844
20

4
nptsmax=21
'even'
2^-10.2209
21

5
errmax=2^-10
'pow2'
2^-11.3921
33

6
nptsmax=21
'pow2'
2^-9.627
17

Example	Options	Spacing	Worst Case Error	Number of Points in Table
1	`errmax=2^-10`	`'unrestricted'`	`2^-10`	16
2	`nptsmax=21`	`'unrestricted'`	`2^-10.933`	21
3	`errmax=2^-10`	`'even'`	`2^-10.0844`	20
4	`nptsmax=21`	`'even'`	`2^-10.2209`	21
5	`errmax=2^-10`	`'pow2'`	`2^-11.3921`	33
6	`nptsmax=21`	`'pow2'`	`2^-9.627`	17

Specifying Both errmax and nptsmax Summary: Using the Lookup Table Functions