| T O P I C R E V I E W |
| ovince |
Posted - 11/26/2006 : 06:24:51 AM
hi,
Could someboby help me to complete this statistical task.
I have a worksheet with X , Y data. I would like to fit polynoms (1 oreder, 2 order ...) to the data and to calculate the corresponding R-squared.
I have something like this:
void test()
{
...
//calculate R-square
string strB1 = "Data1_B"
LT_set_str("%P", strB1);
string LTcmdB1;
LTcmdB1 = "stat.data$=%P;"
"stat.lr();";
LT_execute(LTcmdB1);
double adrsqCB1;
LT_get_var("stat.adrsq", &adrsqCB1);
.....
}
how to 'tell' the program to calculate R-squared for 3 order polynom for example? Or for 2 order?
Thanks
oliver |
| 1 L A T E S T R E P L I E S (Newest First) |
| Mike Buess |
Posted - 11/26/2006 : 2:44:44 PM
Hi Oliver,
R^2 is given by stat.cod but polynomial fit is stat.pr(), not stat.lr() (linear regression).
using stat = LabTalk.stat;
stat.reset();
stat.data$ = "Data1_B";
stat.pr.order = 1; // 1st order
stat.pr();
out_double("1st order: R^2=",stat.cod);
stat.pr.order = 2; // 2nd order
stat.pr();
out_double("2nd order: R^2=",stat.cod);
Mike Buess
Origin WebRing Member
Edited by - Mike Buess on 11/26/2006 2:46:01 PM |
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