Thank Rolf,
I am aware of the extrapolation possibilities within the interpolation
packages within akima but this interpolation often leads to unrealistic
results for my sedimentary units. Therefore I would like to be able to just
apply the interpolation to the thickness measurements within the
Hi Rolf,
Thanks for the feedback, I am indeed using the 'spatstat' package and now
have the info I need.
Thanks again,
Sam
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Hi there,
I have been using the Tps function (within the Fields package) for a while
now to interpolate different sedimentary units. Due to the method of
formation of the units I know that at some edges the thickness of the unit
decreases to zero. I was wondering if there was someway to specify
Hi there,
I have two data sets, one of locations at different elevations (x,y,z) and
the other of points that make up topographic contours (also x,y,z). I have
used:
result-apply(distppll(data2,cbind(topocon[-nrow(topocon),],topocon[-1,])),1,min)
where 'data2' are my measurement coordinates (x,
Hello everyone,
I have been trying to figure out away to integrate under a spline produced
by the package tps(fields). As the package does not output functions I am
trying to do something similar to the trapezium rule. My data are 3D (x, y
z). I have extracted from the surface output by Tps the
Hello there,
I am using the Tps function to fit a spline to my data which is measurements
of a sedimentary layer on an xy plane to see how the thickness of the layer
changes. I was wondering if it was possible to change the Tps code so that
no minus values are calculated by the spline as these
Hi there,
After many attempts at trying different methods I have used the Tps package
to interpolate between a number of measurements of field data, in this case
thickness of a sedimentary deposit. My input values are Longitude, Latitude
and Thickness and I have produced a valid contour map
Thank you for the helpful direction to the smoothing splines function, it was
very helpful and is exactly what i am trying to do. My data however is 3-D,
i.e. i have x and y values which are coordinates for different field sites
and z values which are really what I am interested in analysing with
Does anyone know if R has a function for splines under tension. I know there
are numerous packages for spline interpolation within R i just can't find
one that lets you determine the tension factor.
Any help would be much appreciated!
Sam
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