I'm a beginner. I need to create a very basic C program. Basically the program has to perform least square analysis on 8 sets of data. The program needs to read the values (magnitude and velocity) from the keyboard. Magnitude is the x value and logvelocity is the y value. The program does work but its not giving me the correct results. Some help will be much appreciate. I have attached my attempt. Please keep it as simple as possible.
Thanks a lot.
I don't see any structure or mechanical errors with the code. Must be a formula issue.
Mainframe assembler programmer by trade. C coder when I can.
I don't see any formula issues compared to Linear least squares - Wikipedia, the free encyclopedia either at first glance. First thing I would check, you're using "log", which computes ln. If you want to compute log, you need to use "log10".
You are not using the array logv[], but are assigning the logarithm of v[] into y[]...
So maybe it has something to do with that. Formula/correct variable issue.
These are the formulae. For some reason the program is not doing that:
Last edited by kd001; 11-03-2009 at 04:37 PM.
'tabstop' may be onto something. I should calculate log10velocity so when I get the chance I will try changing it to log10.
That's a strange definition of "works."Originally Posted by kd001
Code://try //{ if (a) do { f( b); } while(1); else do { f(!b); } while(1); //}
By works I just meant it compiles and runs.
Anyway changing from log to log10 solved the problem. Thanks to all those who gave their advice.
