| ??? 03/19/04 01:15 Read: times |
#67014 - RE: Lookup table Responding to: ???'s previous message |
I use Excel to generate my fixed point conversion factors too. I have a spreadsheet set up to implement the fractional equivalence equation where I can select a multiplier and divisor that will give me the factor that I'm looking for, to the accuracy I want...and keeping in mind the data types I'm using (int, unsigned int, long, etc.).
For instance, the cosine of 30 degrees is pretty close to 181/209; 989/1142 is closer, 1170/1351 is yet closer. I convert miles to kilometers by multiplying by 140 and dividing by 87. See http://mathforum.org/dr.math/f...tions.html for details on the fractional equivalence equation. Dennis |
| Topic | Author | Date |
| can\'t use sin(x) in math.h from µvision | 01/01/70 00:00 | |
| RE: can\'t use sin(x) in math.h from µvision | 01/01/70 00:00 | |
| RE: can\'t use sin(x) in math.h from µvision | 01/01/70 00:00 | |
| RE: can\'t use sin(x) in math.h from µvision | 01/01/70 00:00 | |
| Lookup table | 01/01/70 00:00 | |
| RE: Lookup table | 01/01/70 00:00 | |
| Taylor series | 01/01/70 00:00 | |
| RE: can\'t use sin(x) in math.h from µvision | 01/01/70 00:00 | |
| Very nice links! | 01/01/70 00:00 | |
| RE: can\'t use sin(x) in math.h from µv | 01/01/70 00:00 | |
RE: can\'t use sin(x) in math.h from µv | 01/01/70 00:00 |