Using csaps Cubic Smoothing spline
in [Matlab]
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From: Jonathan on 23 Feb 2010 06:52 Hello, I wish to use 'csaps' to fit a cubic smoothing spline to my data. My x and y data are stored in the workspace as 801 x 1 doubles. When I try to use csaps as follows: pp = csaps(x,y,p); where p is the fitting parameter I get the error message: ??? Undefined function or method 'csaps' for input arguments of type 'double'. I've tried storing the x and y data as e.g. int64 but I get the same error message except with 'int64' instead of 'double'. I have also tried copying & pasting the examples from the help for the csaps function, but I get the same problem. I've literally only started using Matlab in the last week or so, so no doubt I'm doing some basic thing wrong or I don't have something installed that I need - so apologies if this a ridiculously elementary question! Thanks in advance for your help.
From: us on 23 Feb 2010 07:05 "Jonathan " > ??? Undefined function or method 'csaps' for input arguments of type > 'double'. a hint: - make sure you own the spline tbx... - eg, ver % -or- ver splines us
From: Wayne King on 23 Feb 2010 07:13 "Jonathan " <jonathan.mckendry(a)strath.ac.uk> wrote in message <hm0fh4$4sp$1(a)fred.mathworks.com>... > Hello, > > I wish to use 'csaps' to fit a cubic smoothing spline to my data. My x and y data are stored in the workspace as 801 x 1 doubles. When I try to use csaps as follows: > > pp = csaps(x,y,p); > > where p is the fitting parameter I get the error message: > > ??? Undefined function or method 'csaps' for input arguments of type > 'double'. > > I've tried storing the x and y data as e.g. int64 but I get the same error message except with 'int64' instead of 'double'. > > I have also tried copying & pasting the examples from the help for the csaps function, but I get the same problem. I've literally only started using Matlab in the last week or so, so no doubt I'm doing some basic thing wrong or I don't have something installed that I need - so apologies if this a ridiculously elementary question! > > Thanks in advance for your help. Hi Jonathan, do you have the Curve Fitting Toolbox installed? If you enter >>ver at the command line, you should see an entry for Curve Fitting Toolbox I suspect that either you don't have it installed, or something went wrong with the installation. Also, entering >> which csaps should return something ending in: toolbox\curvefit\splines\csaps.m Wayne
From: Jonathan on 23 Feb 2010 08:15
> Hi Jonathan, do you have the Curve Fitting Toolbox installed? > > If you enter > > >>ver > > at the command line, you should see an entry for > > Curve Fitting Toolbox > > I suspect that either you don't have it installed, or something went wrong with the installation. > > Also, entering > > >> which csaps > > should return something ending in: > > toolbox\curvefit\splines\csaps.m > > Wayne ---- Thanks for your replies, When I type >>ver I do see an entry for Curve Fitting Toolbox and Spline Toolbox, However, when I type >> which csaps I get C:\Program Files\MATLAB\R2009b\toolbox\splines\csaps.m % Has no license available I guess this means that it is installed but the license hasn't activated or something like that. I'll speak to our IT officer and see if he can help - I'll report back! Cheers, Jonathan |