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jonni
United Kingdom
58 Posts |
 Posted - 02/09/2004 : 10:15:35 AM
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trying to fit data with the following macro:
%C=Data1_c; // selecting data to fit
nlsf.xBegin=0.015;// setting the range
nlsf.xEnd=0.0175; // of fitting
run.section(fit,Fit1Peak,Gauss); //fitting
problem is that xBegin and xEnd do no change the fitting range, and whole curve is fitted.
how to specify fitting range??
many thanks
Evgeniy
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greg
USA
1379 Posts |
Posted - 02/09/2004 : 10:46:32 AM
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Easiest may be to use row index to set the range (this is the way the Data Selector tool works):
mks1=4;mks2=16; // Set fitting range to use from row 4 to 16 in plot
run.section(fit,Fit1Peak,Gauss);
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jonni
United Kingdom
58 Posts |
Posted - 02/09/2004 : 11:15:04 AM
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Hi greg,
is it right that you suggested to do the following:
mks1=xindex(0.015,%C);
mks2=xindex(0.0174,%C);
???
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jonni
United Kingdom
58 Posts |
Posted - 02/09/2004 : 11:18:52 AM
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what is very strange after when i change mks1,mks2 values the following: data1_a=data1_a-0.1 changes values of the data1_a ONLY for the values between mks1 and mks2.
how doing data1_a=data1_a-0.1 change whole rows in data1, but not just between markers...
i tried mks1=-1, it didn't help
:(
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greg
USA
1379 Posts |
Posted - 02/09/2004 : 12:58:20 PM
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Setting the markers will limit all math, analysis and fitting to the marker range. Setting the MKS1 value to -1 will restore a plot to full range.
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jonni
United Kingdom
58 Posts |
Posted - 02/09/2004 : 1:51:05 PM
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unfortunatelly mks1=-1 doesn't help,
even after mks1=-1; data1_a=data1_a+0.1 modifies only the region between previously defined markers
:(
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Topic |
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fitting range