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cubic spline fitting [message #89684]

Thu, 13 November 2014 18:18

iansmith@bigpond.net. is currently offline

iansmith@bigpond.net.
Messages: 4
Registered: October 2014

Junior Member

I am trying to use the IDL routines

spl_init and spl_interp

to do a cubic spline fit to variables that are vectors with 45 elements.
ie y is not a function of x.

I am getting 2 compilation errors where it seems to be objecting to using a vector for y instead of y being a function of x.

IDL> .compile -v 'C:\Ian_Plots\complines 27102014 FYZ Clumps SiO 2-1 and 5-4 Peak Tbs dV30.pro'
% Compiled module: LOAD_MOLDATA.

spl_init,(x_nH_5,y_Tb13N_5,double)
^
% Syntax error.
At: C:\Ian_Plots\complines 27102014 FYZ Clumps SiO 2-1 and 5-4 Peak Tbs dV30.pro, Line 476

spl_interp,(x_nH_5,y_Tb13N_5,x2_nH_5,y2_13N_5,double)
^
% Syntax error.
At: C:\Ian_Plots\complines 27102014 FYZ Clumps SiO 2-1 and 5-4 Peak Tbs dV30.pro, Line 481
% 2 Compilation error(s) in module $MAIN$.

Is my diagnosis correct?

Is there a way around this problem ?

I would appreciate some help.

Regards

Ian Smith

Dept of Science and Engineering
Macquarie University

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[Message index]

		cubic spline fitting By: iansmith@bigpond.net. on Thu, 13 November 2014 18:18
		Re: cubic spline fitting By: wlandsman on Thu, 13 November 2014 18:50
		Re: cubic spline fitting By: iansmith@bigpond.net. on Tue, 18 November 2014 20:22

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