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mej
Albania
Posts |
 Posted - 01/21/2004 : 12:15:28 PM
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Hello
I want to fit 33 datasets with the same x values and i use this script
loop(n,1,33){
StartRange=0.5;
EndRange=0.9;
mks1=xindex(StartRange,data_a); // data_a is the x value
mks2=xindex(EndRange,data_a);
doc -uw;
lr data_int$(n); // data_int$(n) is the y values
};
But the result is not correct |
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Mike Buess
USA
3037 Posts |
Posted - 01/21/2004 : 3:36:09 PM
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1. mks1 and mks2 are usually reserved for use with the data selector tool. When using lr in a loop it's probably better to specify the range on the command line as shown below.
2. xindex uses a Y dataset as the argument, not the X dataset. Since the X values are shared by all Y datasets you only need to get the start and stop indices once.
StartRange=0.5;
EndRange=0.9;
i1=xindex(StartRange,data_int1);
i2=xindex(EndRange,data_int1);
loop (n,1,33) {
lr data_int$(n) -b i1 -e i2;
type $(n): $(lr.a), $(lr.b); // dataset #: intercept, slope
};
Mike Buess
Origin WebRing Member
Edited by - Mike Buess on 01/21/2004 6:32:53 PM |
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mej
Albania
Posts |
Posted - 01/22/2004 : 11:07:35 AM
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It is OK but the linear fit does not appear in the graphs previously ploted in each graph
Thanks |
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linear fit with a loop